Robert Wendell Heath
Also known as: R. W. Heath, Jr.; R. W. Heath Jr.; R. W. Heath
Dr. Robert W. Heath Jr. is a Professor in the Department of Electrical and Computer Engineering at the University of California, San Diego. He received the B.S. and M.S. degrees from the University of Virginia, Charlottesville, VA, in 1996 and 1997 respectively, and the Ph.D. from Stanford University, Stanford, CA, in 2002, all in electrical engineering. From 1998 to 2001, he was a Senior Member of the Technical Staff then a Senior Consultant at Iospan Wireless Inc, San Jose, CA where he worked on the design and implementation of the physical and link layers of the first commercial MIMO-OFDM communication system. From 2002 to 2020, he was with The University of Texas at Austin where he was a Cockrell Family Regents Chair in Engineering and founded the Situation Aware Vehicular Systems initiative. From 2020 to 2023, he was with North Carolina State University where he was the Lampe Distinguished Professor. He is also President and CEO of MIMO Wireless Inc. His research interests include several aspects of wireless communication, signal processing, and sensing: MIMO, limited feedback techniques, multi-hop networking, manifold signal processing, millimeter wave communication techniques, and vehicular communication systems. He authored ``Introduction to Wireless Digital Communication'' (Prentice Hall, 2017) and ``Digital Wireless Communication: Physical Layer Exploration Lab Using the NI USRP'' (National Technology and Science Press, 2012), and co-authored ``Millimeter Wave Wireless Communications'' (Prentice Hall, 2014) and ``Foundations of MIMO Communication'' (Cambridge University Press, 2019). Dr. Heath was an elected member of the Board of Governors for the IEEE Signal Processing Society (2016-2018) and the IEEE Communications Society (2018-2020). He was the Editor in Chief of the IEEE Signal Processing Magazine (2018-2020). He has been an Editor for the IEEE Transactions on Communication, an Associate Editor for the IEEE Transactions on Vehicular Technology, and lead guest editor for special issues in the IEEE Journal on Selected Areas in Communications, the IEEE Journal on Selected Topics in Signal Processing and the IEEE Signal Processing Magazine. He was on the steering committee for the IEEE Transactions on Wireless Communications (2011-2014). He was a member of the Signal Processing for Communications Technical Committee in the IEEE Signal Processing Society and is a former Chair of the IEEE COMSOC Communications Technical Theory Committee. He was a technical co-chair for the 2007 Fall Vehicular Technology Conference, general chair of the 2008 Communication Theory Workshop, general co-chair, technical co-chair and co-organizer of the 2009 IEEE Signal Processing for Wireless Communications Workshop, local co-organizer for the 2009 IEEE CAMSAP Conference, technical co-chair for the 2010 IEEE International Symposium on Information Theory, the technical chair for the 2011 Asilomar Conference on Signals, Systems, and Computers, general chair for the 2013 Asilomar Conference on Signals, Systems, and Computers, founding general co-chair for the 2013 IEEE GlobalSIP conference, and was technical co-chair for the 2014 IEEE GLOBECOM conference. He has co-organized a number of Workshops at IEEE ICC and IEEE GLOBECOM. Dr. Heath co-authored a number of award winning conference and journal papers including the 2016 IEEE Communications Society Fred W. Ellersick Prize, and the 2016 IEEE Communications and Information Theory Societies Joint Paper Award, the 2017 Marconi Prize Paper Award, the 2019 IEEE Communications Society Stephen O. Rice Prize, the 2020 IEEE Signal Processing Society Donald G. Fink Overview Paper Award, the 2020 North Carolina State University Innovator of the Year Award, the 2021 IEEE Vehicular Technology Society James Evans Avant Garde Award, and the 2022 IEEE Vehicular Technology Society Best Vehicular Electronics Paper Award. He received the 2017 EURASIP Technical Achievement award and is co-recipient of the 2019 IEEE Kiyo Tomiyasu Award. He was a distinguished lecturer in the IEEE Signal Processing Society and is a Highly Cited Researcher. He is a licensed Amateur Radio Operator, a registered Professional Engineer in Texas, a Fellow of the National Academy of Inventors, and a Fellow of the IEEE.
Works (811)
Updated: March 29th, 2024 05:02
2023 journal article
A Wideband Generalization of the Near-Field Region for Extremely Large Phased-Arrays
IEEE WIRELESS COMMUNICATIONS LETTERS, 12(3), 515–519.
author keywords: Near-field; wideband; phased-array; frequency-selective; beamforming gain
arxiv.org (repository)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: April 24, 2023
2023 article
ADMM-based Solution for mm Wave UL Channel Estimation with One-bit ADCs via Sparsity Enforcing and Toeplitz Matrix Reconstruction
ICC 2023 - IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, pp. 1338–1343.
author keywords: Multi-user MIMO; uplink channel estimation; one-bit ADC; angular domain; Toeplitz matrix reconstruction; l(1) regularized logistic regression
TL;DR:
This work reformulates the UL channel estimation problem, and combines the idea of regularized logistic regression classification and Toeplitz matrix reconstruction in a properly designed optimization problem to develop a computationally efficient alternating direction method of multi-pliers (ADMM)-based implementation for the L1-RLR-TMR method.
(via Semantic Scholar)
Source: Web Of Science
Added: March 4, 2024
2023 journal article
Achievable Rate of Near-Field Communications Based on Physically Consistent Models
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 22(2), 1266–1280.
author keywords: Antennas; Noise measurement; Antenna theory; Integrated circuit modeling; Wireless communication; SISO communication; Mathematical models; Circuit theory for communications; NFC; SISO; mutual coupling; induced EMF method; CMS antennas; Chu's limit; compact antennas
Sources: Web Of Science, NC State University Libraries
Added: April 11, 2023
2023 article
Bandwidth Gain: the Missing Gain of Massive MIMO
ICC 2023 - IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, pp. 5997–6003.
author keywords: MIMO; circuit theory for communication; far-field wireless communication; mutual coupling; Chu's limit; canonical minimum scattering antennas; compact antennas; super-wideband antenna arrays
TL;DR:
The results reveal new insights into the design of tightly-coupled massive antenna arrays as opposed to the widely-adopted “disconnected” designs that disregard MC by putting faith in the half-wavelength spacing rule.
(via Semantic Scholar)
Source: Web Of Science
Added: March 4, 2024
2023 journal article
Circulant Shift-Based Beamforming for Secure Communication With Low-Resolution Phased Arrays
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 22(4), 2295–2310.
author keywords: Symbols; Antenna arrays; Phased arrays; Millimeter wave communication; Eavesdropping; Array signal processing; Phase shifters; Millimeter wave (mmWave) communication; physical layer security; low-resolution phased arrays; directional modulation
TL;DR:
This work shows that the use of random circulant shifts together with appropriate phase adjustment induces (APN) in the directions different from that of the target receiver, and achieves better defense than the antenna subset modulation.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: May 22, 2023
2023 journal article
Dynamic Network-Assisted D2D-Aided Coded Distributed Learning
IEEE TRANSACTIONS ON COMMUNICATIONS, 71(6), 3352–3367.
author keywords: Computational modeling; Device-to-device communication; Training; Data models; Collaboration; Distance learning; Computer aided instruction; Online distributed learning; device-to-device communications; Index Terms; coded computing; data compression; load balancing
TL;DR:
This work designs a novel D2D-aided coded distributed learning method named D 2D-CDL for efficient load balancing across devices and derives an optimal compression rate, which minimizes the processing time.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: July 31, 2023
2023 article
End-to-end Full-Stack Drone Measurements: A Case Study Using AERPAW
2023 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS WORKSHOPS, ICC WORKSHOPS, pp. 1422–1427.
author keywords: AERPAW; UAV; SDR; LTE
TL;DR:
This paper uses AERPAW for the end-to-end evaluation of the performance of an emulated Uplink traffic between an Unmanned Aerial Vehicle (UAV) and a Fixed Node (FN), connected through an open source LTE network software (srsRAN).
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: March 11, 2024
2023 journal article
Green Joint Communications and Sensing Employing Analog Multi-Beam Antenna Arrays
IEEE COMMUNICATIONS MAGAZINE, 61(7), 172–178.
author keywords: Discrete Fourier transforms; Radio frequency; Array signal processing; Sensors; Antennas; Phased arrays; Lenses; Power demand; Phase shifters; Butler matrices; 6G mobile communication; Hybrid power systems; Energy efficiency; Telecommunication services
TL;DR:
The energy-efficient and easy-to-design multi-beam antenna arrays (MBAAs) for JCAS, using pre-designed and fixed analog devices, can simultaneously steer multiple beams yet with negligible power consumption compared with other techniques are introduced.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: September 11, 2023
2023 journal article
Joint Relay Selection and Beam Management Based on Deep Reinforcement Learning for Millimeter Wave Vehicular Communication
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 72(10), 13067–13080.
author keywords: mmWave MIMO; 3GPP NR V2X; relay selection; deep reinforcement learning
TL;DR:
A joint relay selection and beam management policy based on deep reinforcement learning (DRL) using the Markov property of beam indices and beam measurements is proposed, which learns time-varying thresholds that adapt to the dynamic channel conditions and traffic patterns.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: January 2, 2024
2023 article
Multi-Armed Bandit for Link Configuration in Millimeter-Wave Networks: An Approach for Solving Sequential Decision-Making Problems
Zhang, Y., & Heath Jr, R. W. (2023, February 7). IEEE VEHICULAR TECHNOLOGY MAGAZINE, Vol. 2.
author keywords: Decision making; Antenna arrays; Training; Throughput; Optimization; Wireless communication; Roads
TL;DR:
This article motivates the use of the multi-armed bandit (MAB) framework to intelligently search out the optimal configuration when establishing the mm-wave links by showing that within the MAB framework, the optimal beam sweeping period, beamwidth, and beam directions could be dynamically learned with sample-computational-efficient bandit algorithms.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: March 6, 2023
2023 journal article
Multi-User Downlink Beamforming Using Uplink Downlink Duality With CEQs for Frequency Selective Channels
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 22(12), 9688–9702.
author keywords: OFDM; Precoding; Quantization (signal); Radio frequency; Antennas; Optimization; Downlink; CEQ ADC; CEQ DAC; optimized dithering; uplink downlink duality
TL;DR:
This paper presents a solution to the multi-user multi-carrier beamforming and power allocation problem that maximizes the minimum SQINR over all users and sub-carriers and establishes uplink downlink duality for the system with CEQ hardware constraints and OFDM-based transmission considered.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Web Of Science
Added: March 18, 2024
2023 article
Multi-node joint communication and radar using synchronization signals in 5G
2023 IEEE 9TH INTERNATIONAL WORKSHOP ON COMPUTATIONAL ADVANCES IN MULTI-SENSOR ADAPTIVE PROCESSING, CAMSAP, pp. 161–165.
author keywords: Joint communication and radar; 5G; multi radar; quantization
TL;DR:
This work proposes a JCR system with multiple nodes that leverages the 5G communication waveform for range estimation and proposes a linear minimum mean squared error (LMMSE) based estimate that combines the information from all nodes.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Web Of Science
Added: March 25, 2024
2023 article
Online variable-length source coding for minimum bitrate LQG control
2023 62ND IEEE CONFERENCE ON DECISION AND CONTROL, CDC, pp. 3917–3924.
TL;DR:
This work proposes an adaptive coding approach to achieve linear-Quadratic-Gaussian (LQG) control with near-minimum bitrate prefix-free feedback, and develops a practical, zero-delay, fixed precision source code for the quantizer outputs.
(via Semantic Scholar)
Source: Web Of Science
Added: March 25, 2024
2023 journal article
Physical Layer Security at a Point-to-Point MIMO System With 1-Bit DACs and ADCs
IEEE WIRELESS COMMUNICATIONS LETTERS, 12(8), 1439–1443.
author keywords: Quantization (signal); MIMO communication; Covariance matrices; Resource management; Transmitters; Signal to noise ratio; Security; Multiple-input multiple-output communication; 1-bit digital-to-analog and analog-to-digital converters; discrete and Gaussian signaling; channel state information
TL;DR:
This letter evaluates the secrecy rate for the extreme case of 1-bit single-user multiple-input multiple-output systems following two signaling approaches and proposes an algorithm that provides near-optimal results for low signal-to-noise ratios (SNRs).
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 28, 2023
2023 journal article
Reinforcement Learning-Based Joint User Scheduling and Link Configuration in Millimeter-Wave Networks
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 22(5), 3038–3054.
author keywords: Millimeter wave communication; Relays; Training; Delays; Optimization; Dynamic scheduling; Wireless communication; Millimeter wave; mobility; user scheduling; relay selection; codebook selection; beam tracking; deep reinforcement learning; proximal policy optimization; multi-armed bandit; Thompson sampling
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: July 3, 2023
2023 journal article
Super-Wideband Massive MIMO
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 41(8), 2414–2430.
author keywords: MIMO; circuit theory for communication; far-field wireless communication; mutual coupling; Chu's limit; canonical minimum scattering antennas; compact antennas; super-wideband antenna arrays
TL;DR:
The results reveal new insights into the design of tightly-coupled massive antenna arrays as opposed to the widely-adopted “disconnected” designs that disregard MC by putting faith in the half-wavelength spacing rule.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 28, 2023
2023 journal article
Twenty-Five Years of Advances in Beamforming: From convex and nonconvex optimization to learning techniques
IEEE SIGNAL PROCESSING MAGAZINE, 40(4), 118–131.
author keywords: Array signal processing; Shape; Sonar applications; Seismology; Signal processing algorithms; Optimization methods; Machine learning
TL;DR:
This article captures the evolution of beamforming in the last 25 years from convex to nonconvex optimization and optimization to learning approaches and provides a glimpse into these important signal processing algorithms for a variety of transmit–receive architectures, propagation zones, propagation paths, and multidisciplinary applications.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: July 19, 2023
2022 journal article
A Lower-Bound for Variable-Length Source Coding in Linear-Quadratic-Gaussian Control With Shared Randomness
IEEE CONTROL SYSTEMS LETTERS, 6, 2918–2923.
author keywords: Decoding; Bit rate; Quantization (signal); Costs; Rate-distortion; Data processing; Random variables; Information theory and control; control over communications
TL;DR:
This letter considers a Linear Quadratic Gaussian control system where feedback occurs over a noiseless binary channel and derives lower bounds on the minimum communication cost (quantified via the channel bitrate) required to attain a given control performance.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: June 27, 2022
2022 journal article
Achievable Rate With Antenna Size Constraint: Shannon Meets Chu and Bode
IEEE TRANSACTIONS ON COMMUNICATIONS, 70(3), 2010–2024.
author keywords: Broadband antennas; Antenna theory; Integrated circuit modeling; Antennas; Receiving antennas; Wireless communication; Broadband communication; Achievable rate; Chu's limit; size-limited antennas; broadband impedance matching
TL;DR:
The maximum achievable rate over the single-input single-output wireless communication channels under a restriction on the antenna size at the receiver is characterized and the effective signal-to-noise ratio (SNR) is determined which shows that impedance matching is essential in both narrowband and broadband scenarios.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: April 4, 2022
2022 article
Achievable Rate of Near-Field Communications Based on Physically Consistent Models
IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC 2022), pp. 938–943.
author keywords: Circuit theory for communications; near-field wireless communications; SISO; mutual coupling; induced EMF method; canonical minimum scattering antennas
TL;DR:
A novel information-theoretic approach for studying the effects of mutual coupling, between the transmit and receive antennas, on the overall performance of single-input-single-output (SISO) near-field communications by incorporating the finite antenna size constraint using Chu’s theory and under the assumption of canonical-minimum scattering.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: December 12, 2022
2022 article
An Inverted L-Shaped Multi-Layer Reconfigurable Intelligent Surface for THz Communications
2022 56TH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS, AND COMPUTERS, pp. 1060–1063.
author keywords: Reflective Intelligent Surfaces; Reconfigurable Intelligent Surfaces; Meta-materials; 6G; THz; Beamforming; Beam-steering; Frequency selective surface; MIMO
UN Sustainable Development Goal Categories
3. Good Health and Well-being
(Web of Science)
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: June 5, 2023
2022 journal article
Artificial Intelligence for Physical-Layer Design of MIMO Communications with One-Bit ADCs
IEEE COMMUNICATIONS MAGAZINE, 60(7), 76–81.
TL;DR:
Recent progress in incorporating AI into the design of classical PHY techniques and emerging studies on establishing AI-inspired frameworks that fundamentally replace classical model-driven techniques with data-driven AI techniques are covered.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 1, 2022
2022 article
Attention Neural Network for Downlink Cell-Free Massive MIMO Power Control
2022 56TH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS, AND COMPUTERS, pp. 738–743.
TL;DR:
A computationally efficient deep-learning algorithm to solve the max-min power control optimization problem subject to power constraints by presenting an attention neural network composed using the masked multi-head attention network modules, which are building blocks of the popular transformer neural network.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: June 5, 2023
2022 journal article
Coverage and Capacity of Terahertz Cellular Networks With Joint Transmission
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 21(11), 9865–9878.
author keywords: Terahertz (THz) cellular networks; joint transmission (JT); stochastic geometry; coverage probability; beam misalignment
TL;DR:
Overall, the analysis indicates that joint transmission from a few base stations improves coverage and capacity by mitigating the impact of beam misalignment and in certain settings, NC-JT is a more efficient usage a network access points compared to the non-cooperative case, and reduces the sensitivity of Coverage probability and capacity to the choice of user beamwidth.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: November 28, 2022
2022 journal article
Deep Reinforcement Learning-Based Scheduling for Multiband Massive MIMO
IEEE ACCESS, 10, 125509–125525.
author keywords: Multiband scheduling; MIMO; DRL-based scheduling; mmWave
TL;DR:
This paper considers a massive MIMO system where channels are dynamically allocated in different frequency bands and proposes deep reinforcement learning (DRL) agents to perform user scheduling and shows that the DRL models outperformed baselines obtaining a 20% higher network sum rate and an 84% smaller packet loss rate.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: January 3, 2023
2022 journal article
Extending Uplink Coverage of mmWave and Terahertz Systems Through Joint Phase-Time Arrays
IEEE ACCESS, 10, 88872–88884.
author keywords: True time delay; 5G; 6G; millimeter wave; terahertz; sub-terahertz
TL;DR:
This work proposes a novel use case of JPTA where the BS exploits the frequency-dependent beams to serve multiple users’ equipment (UEs) at different directions simultaneously with the full array gain and with no inter-UE interference.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: September 12, 2022
2022 journal article
InFocus: A Spatial Coding Technique to Mitigate Misfocus in Near-Field LoS Beamforming
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 21(4), 2193–2209.
author keywords: Phased arrays; Array signal processing; Antenna arrays; Bandwidth; Arrays; Wireless communication; Standards; Near-field communication; mm-wave; terahertz; misfocus; beam squint; spatial FMCW
TL;DR:
The misfocus effect is investigated and InFocus, a low complexity technique to construct beams that are well suited for massive wideband phased arrays is proposed, which mitigates beam misfocus and beam squint when applied to near-field and far-field systems.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: April 25, 2022
2022 journal article
Integration of Radar Sensing into Communications with Asynchronous Transceivers
IEEE COMMUNICATIONS MAGAZINE, 60(11), 106–112.
TL;DR:
This article provides a systematic overview of existing and potential new techniques for tackling clock asynchronism in radar sensing, including using a finetuned global reference clock, and single-node-based and network-based techniques.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: December 5, 2022
2022 article
Joint Beam Management and Relay Selection Using Deep Reinforcement Learning for MmWave UAV Relay Networks
2022 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM).
TL;DR:
This paper uses deep reinforcement learning (DRL) to jointly select unblocked UAV relays and to perform beam management and shows with numerical evaluation that the proposed method outperforms baselines without prior channel knowledge.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: May 15, 2023
2022 article
Massive MIMO Beam Management in Sub-6 GHz 5G NR
2022 IEEE 95TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2022-SPRING).
TL;DR:
It is shown that machine learning can be used to train site-specific codebooks for initial access and approaches the optimal performance (perfect CSI and singular value decomposition (SVD)-based beamforming), using only a few bits of feedback.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: October 31, 2022
2022 journal article
Massive MIMO Precoding and Spectral Shaping With Low Resolution Phase-Only DACs and Active Constellation Extension
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 21(7), 5265–5278.
author keywords: Precoding; Receivers; Message passing; Approximation algorithms; Optimization; Wireless communication; Transmitting antennas; Massive MIMO; millimeter-wave; precoding; spectral shaping; low resolution DACs
TL;DR:
Simulation and analytical results demonstrate that the proposed combined pulse shaping and precoding approach compared to standard linear methods yields the same performance as the SER based formulation in terms of uncoded SER.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 29, 2022
2022 journal article
Multi-User Downlink Beamforming Using Uplink Downlink Duality With 1-Bit Converters for Flat Fading Channels
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 71(12), 12885–12900.
author keywords: 1-bit ADC; DAC; multi-user beamforming and power allocation; uplink downlink duality; optimized dithering
TL;DR:
This paper presents a linear solution to the multi-user downlink beamforming problem based on the uplink downlink duality principle, and significantly reduces the performance gap from non-linear solutions in terms of the uncoded bit error rate at a fraction of the computational complexity.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: February 6, 2023
2022 article
Nonuniform true time delay precoding in wideband MISO systems
2022 56TH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS, AND COMPUTERS, pp. 1233–1237.
author keywords: true time delay beamforming; wideband; multi-path; sparse eigenvalue problem; minorization-maximization
TL;DR:
This work reformulates the TTD constraint by including a sparsity regularizer penalty term in the objective and proposes a procedure to compute the delays using the precoder response obtained after solving a sparse eigenvalue problem for maximizing the total energy.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being
(Web of Science)
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: June 5, 2023
2022 article
Optimizing the Deployment of Reconfigurable Intelligent Surfaces in MmWave Vehicular Systems
2022 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM 2022), pp. 5261–5266.
author keywords: Reconfigurable intelligent surfaces; millimeter wave; blockages; deployment; vehicular systems
TL;DR:
This paper finds the optimal location, height and downtilt of RIS working in a realistic vehicular scenario and finds that the optimized RIS improves the area-averaged rate fifty percent over the case without a RIS, as well as further improvements in the coverage ratio.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: May 1, 2023
2022 journal article
Optimizing the Mutual Information of Frequency-Selective Multi-Port Antenna Arrays in the Presence of Mutual Coupling
IEEE TRANSACTIONS ON COMMUNICATIONS, 70(3), 2072–2084.
author keywords: Antenna arrays; Antennas; Broadband antennas; MISO communication; Wideband; Mathematical models; Correlation; Mutual coupling; multi-band; wideband communication; Shannon; MISO; SIMO; optimization; wideband antenna array; beamforming; matching
TL;DR:
A system model that incorporates the effects of mutual coupling (MC) of wideband physically realizable single-input multiple-output (SIMO) and multiple-input single- output (MISO) antenna systems is presented and a new single-port matching technique for wideband antenna arrays is developed.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: April 4, 2022
2022 article
Physical Layer Defense against Eavesdropping Attacks on Low-Resolution Phased Arrays
IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC 2022), pp. 492–497.
TL;DR:
A directional modulation (DM)-based defense against eavesdropping attacks on low-resolution phased arrays by applies random circulant shifts to the beamformer for every symbol transmission and theoretically analyzes the secrecy mutual information (SMI) achieved by the proposed defense mechanism.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: December 12, 2022
2022 journal article
Radar Imaging Based on IEEE 802.11ad Waveform in V2I Communications
IEEE TRANSACTIONS ON SIGNAL PROCESSING, 70, 4981–4996.
author keywords: Radar imaging; Radar; Imaging; Doppler shift; OFDM; Millimeter wave communication; Doppler radar; IEEE 802; 11ad; ISAR imaging; joint radar and communication system; vehicular environments
TL;DR:
Simulation results verify that the proposed ISAR imaging technique is able to form high-resolution ISAR images from point scatterer models of realistic vehicular settings with different viewpoints.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: November 28, 2022
2022 article
SPARSITY ENFORCING WITH TOEPLITZ MATRIX RECONSTRUCTION METHOD FOR MMWAVE UL CHANNEL ESTIMATION WITH ONE-BIT ADCS
2022 IEEE 12TH SENSOR ARRAY AND MULTICHANNEL SIGNAL PROCESSING WORKSHOP (SAM), pp. 141–145.
author keywords: Multi-user MIMO; uplink channel estimation; one-bit analog-to-digital converter; angular domain; Toeplitz matrix reconstruction
TL;DR:
This work reformulates the UL channel estimation prob-lem as a multiplication of two specific matrices, and then leverages Toeplitz matrix reconstruction in conjunction with the angular domain sparsity of the UL channels to recover UL channel via solving a properly designed optimization Prob-lem.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: February 27, 2023
2022 journal article
SignalNet: A Low Resolution Sinusoid Decomposition and Estimation Network
IEEE TRANSACTIONS ON SIGNAL PROCESSING, 70, 4454–4467.
author keywords: Signal processing algorithms; Estimation; Quantization (signal); Signal resolution; Task analysis; Neural networks; Data models; Sinusoid decomposition; estimation; deep-learning; low-resolution; detection
TL;DR:
This work proposes SignalNet, a neural network architecture that detects the number of sinusoids and estimates their parameters from quantized in-phase and quadrature samples that incorporates signal reconstruction internally as domain knowledge within the network to enhance learning and surpass traditional algorithms in mean squared error and Chamfer error.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: October 3, 2022
2022 journal article
Single Channel Equivalent Point Processes of Poisson Networks With Multiple Channel Laws
IEEE COMMUNICATIONS LETTERS, 26(3), 711–715.
author keywords: Fading channels; Transmitters; Cellular networks; Transforms; Random variables; Loss measurement; Heating systems; Stochastic geometry; point processes; wireless network analysis; mmWave and THz networks
TL;DR:
The construction and characterization of novel single channel equivalent representations of a Poisson Point Process (PPP) whose points follow multiple channel laws with respect to the origin are presented.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: March 28, 2022
2021 article
A Novel Antenna Matching Technique for Joint Wireless Communication and Energy Harvesting
2021 IEEE-APS TOPICAL CONFERENCE ON ANTENNAS AND PROPAGATION IN WIRELESS COMMUNICATIONS (APWC), pp. 36–36.
TL;DR:
The enhanced antenna matching process integrates the information theoretic capacity equation and Maxwell's equations and substantially improves the trade-off between the harvested power and spectral efficiency based on the joint optimization approach.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: December 20, 2021
2021 journal article
Adaptive and Fast Combined Waveform-Beamforming Design for MMWave Automotive Joint Communication-Radar
IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING, 15(4), 996–1012.
author keywords: Radar; Radar antennas; Automotive engineering; Sensors; Channel estimation; Array signal processing; Radar applications; Automotive radar; millimeter-wave vehicular communication; joint communication-radar; partial Fourier compressed sensing; adaptive waveform and beamforming design
TL;DR:
Numerical results demonstrate that the proposed JCR design enables the estimation of short- and medium-range radar channels in the Doppler-angle domain with a low normalized MSE, at the expense of a small degradation in the communication distortion MSE.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: June 28, 2021
2021 journal article
An Overview of Signal Processing Techniques for Joint Communication and Radar Sensing
IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING, 15(6), 1295–1315.
author keywords: Radar; Sensors; Signal processing; Radar cross-sections; Optimization; Radar signal processing; Receivers; Dual-function radar-communications (DFRC); RadCom; joint radar-communications (JRC); joint communica-tions-radar (JCR); joint communication and radio; radar sensing (JCAS); integrated sensing and communications (ISAC)
TL;DR:
This paper provides a comprehensive overview of the state-of-the-art on JCR systems from the signal processing perspective, and a balanced coverage on both transmitter and receiver is provided for three types of J CR systems, namely, communication-centric, radar-centric and joint design and optimization.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: December 13, 2021
2021 journal article
Challenges and Opportunities of Future Rural Wireless Communications
IEEE COMMUNICATIONS MAGAZINE, 59(12), 16–22.
author keywords: Wireless communication; Costs; Sociology; Transportation; Broadband communication; Reliability; Statistics
TL;DR:
The motivations and challenges of providing broadband access over vast rural regions are examined, with an emphasis on the wireless aspect in view of its irreplaceable role in closing the digital gap.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: January 24, 2022
2021 article
Coverage in Terahertz Cellular Networks with Imperfect Beam Alignment
2021 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM).
author keywords: THz networks; stochastic geometry; beam misalignment; coverage probability
TL;DR:
A novel stochastic geometry framework is developed to quantify the SINR coverage probability of a Terahertz (THz) cellular network, introducing a novel approach of characterizing non line-of-sight (NLOS) links as equivalent LoS links using a non-homogeneous Poisson Point Process.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: May 23, 2022
2021 article
DEEP LEARNING BASED RANGE AND DOA ESTIMATION USING LOWRESOLUTION FMCW RADARS
2021 IEEE STATISTICAL SIGNAL PROCESSING WORKSHOP (SSP), pp. 366–370.
TL;DR:
A deep learning model is presented for simultaneous range and direction of arrival estimation of frequency modulated continuous waveform radars using 1-bit analog-to-digital converters and can accurately detect the position of a vehicle within the field of view.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: December 20, 2021
2021 journal article
DeepWiPHY: Deep Learning-Based Receiver Design and Dataset for IEEE 802.11ax Systems
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 20(3), 1596–1611.
author keywords: Receivers; Wireless communication; Channel estimation; OFDM; Training; IEEE 802; 11ax Standard; Deep learning; IEEE 802; 11ax; Wi-Fi 6; OFDM; channel estimation; hardware impairment compensation; dataset generation; experimental evaluation
TL;DR:
The comprehensive evaluation of Deep WiPHY with synthetic and real-world datasets confirms that, even without fine-tuning the neural network’s architecture parameters, DeepWiPHY achieves comparable performance to or outperforms the conventional WLAN receivers, under a wide range of channel models, signal-to-noise (SNR) levels, and modulation schemes.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: April 19, 2021
2021 journal article
Improved CRB for Millimeter-Wave Radar With 1-Bit ADCs
IEEE OPEN JOURNAL OF SIGNAL PROCESSING, 2, 318–335.
author keywords: Radio frequency; Parameter estimation; System performance; Computer architecture; Millimeter wave radar; Hardware; Sensors; 1-bit ADC; analog preprocessing; bussgang decomposition; Cramer-Rao bound; Fisher information; radar
TL;DR:
The potential of the proposed architecture to meet the requirements of high-resolution sensing through analytical derivation and numerical computation of an improved CRB is demonstrated and its achievability is shown through a correlation-based estimator.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: July 12, 2021
2021 journal article
JCR70: A Low-Complexity Millimeter-Wave Proof-of-Concept Platform for a Fully-Digital SIMO Joint Communication-Radar
IEEE OPEN JOURNAL OF VEHICULAR TECHNOLOGY, 2, 218–234.
author keywords: Radar; Radar antennas; Millimeter wave communication; Channel estimation; Wideband; Hardware; Antenna arrays; Antenna arrays; fully-digital radio implementation; low -resolution ADCs; millimeter-wave communication; millimeter-wave radar; sparse estimation
TL;DR:
This paper presents a joint communication-radar proof-of-concept platform, named JCR70, to evaluate and demonstrate the performance of these JCR systems using real channel measurements in the 71–76 GHz band, and compares this platform with the INRAS Radarbook.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: July 6, 2021
2021 journal article
Leveraging Waveform Structure to Develop a Power Scalable AoA Estimation
IEEE OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY, 2, 2739–2759.
author keywords: Estimation; Receivers; Power demand; Linear antenna arrays; Wireless communication; Signal to noise ratio; Computer architecture; Sub-Nyquist AoA estimation; mmWave; digital receiver; pilot design; waveform structure
TL;DR:
This paper provides a power scalable solution for AoA estimation with structured waveforms in a narrowband channel named ADELA, and designs a set of pilot sequences that maintain orthogonality in sub-Nyquist sampling domains.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: January 18, 2022
2021 journal article
Line-of-Sight Probability for mmWave-Based UAV Communications in 3D Urban Grid Deployments
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 20(10), 6566–6579.
author keywords: Buildings; 3GPP; Mathematical model; Analytical models; Urban areas; Unmanned aerial vehicles; Three-dimensional displays; 3D LoS probability; urban grid deployment; mmWave radio; UAV communication; 5G NR technology
TL;DR:
A LoS probability model in UAV communication setups over regular urban grid deployments, which is based on a Manhattan Poisson line process, is proposed and it is established that the latter provide an overly optimistic approximation for various deployments.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: November 1, 2021
2021 article
Optimization of a Millimeter-Wave UAV-to-Ground Network in Urban Deployments
2021 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2021).
TL;DR:
An urban tactical wireless network is considered wherein the base stations are situated on unmanned aerial vehicles (UAVs) that provide connectivity to ground assets such as vehicles located on city streets that characterizes the performance by a connectivity distribution, and identifies the optimal altitude for the UAVs.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(Web of Science)
11. Sustainable Cities and Communities
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: July 18, 2022
2021 article
Optimizing Coverage and Capacity in Cellular Networks using Machine Learning
2021 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP 2021), pp. 8138–8142.
author keywords: coverage and capacity optimization; Bayesian optimization; machine learning; reinforcement learning
TL;DR:
This paper develops and compares two approaches for maximizing coverage and minimizing interference by jointly optimizing the transmit power and downtilt (elevation tilt) settings across sectors and suggests that data-driven techniques can effectively self-optimize coverage and capacity in cellular networks.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: November 29, 2021
2021 journal article
Perceptive Mobile Networks: Cellular Networks With Radio Vision via Joint Communication and Radar Sensing
IEEE VEHICULAR TECHNOLOGY MAGAZINE, 16(2), 20–30.
author keywords: Sensors; Downlink; Uplink; Hardware; OFDM; Mobile commuincation; Radio transmitters; Cellular networks; Pattern recognition; Mutual information; Network architecture; Parameter estimation
TL;DR:
A system architecture that unifies three types of sensing is presented, the required modifications to existing mobile networks are investigated, and the signals applicable to sensing are exemplified.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: June 14, 2021
2021 journal article
Power Scalable Angle of Arrival Estimation Using Pilot Design With Orthogonal Subsequences
IEEE OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY, 2, 1690–1709.
author keywords: AoA estimation; digital receiver; mmWave; pilot design; scalable power
TL;DR:
This paper presents a variable rate sub-Nyquist decoupling solution that leverages pilot design and indicates some other benefits of the decoupled, including reduced complexity algorithm implementation and improved performance estimation for the non maximum likelihood estimators.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 2, 2021
2021 journal article
Quantum Codes in Classical Communication: A Space-Time Block Code From Quantum Error Correction
IEEE OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY, 2, 2383–2412.
author keywords: Codes; Quantum mechanics; Quantum computing; Error correction codes; Block codes; Encoding; MIMO communication; Wireless communications; space-time coding; MIMO; quantum error correction
TL;DR:
A general framework for noncoherent communication using techniques from the field of quantum error correction (QEC) is proposed and a family of space-time block codes for non-coherent multiple-input multiple-output (MIMO) communication is developed.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: November 15, 2021
2021 journal article
Scheduling Observers Over a Shared Channel With Hard Delivery Deadlines
IEEE TRANSACTIONS ON COMMUNICATIONS, 69(1), 133–148.
author keywords: Ultra-reliability; low-latency; infrastructure wireless networks; hard deadlines; decision making; sensor scheduling; sensor selection; branch-and-bound; IoT; 5G; URLLC; mMTC
TL;DR:
This work develops a novel framework to formulate the Observer Selection problem through which the executive schedules a sequence of observations that maximize its knowledge about the current state of the system it controls, and devise a branch-and-bound algorithm that systematically prunes the search space.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
16. Peace, Justice and Strong Institutions
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: February 15, 2021
2021 article
Signal Conditioning and Prototyping for Selective OFDM Systems with Simultaneous Wireless Information and Power Transfer
2021 IEEE-APS TOPICAL CONFERENCE ON ANTENNAS AND PROPAGATION IN WIRELESS COMMUNICATIONS (APWC), pp. 61–61.
TL;DR:
A selective OFDM system is introduced which leverages the OFDM signal structure for energy harvesting and incorporates co-receiver implementations into receiver architectures.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: December 20, 2021
2021 journal article
Signal Conditioning for Selective OFDM SWIPT Systems
IEEE OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY, 2, 1886–1900.
author keywords: Wireless communication; Monte Carlo methods; Transmitters; OFDM; System performance; Rectifiers; Prototypes; Conversion efficiency; orthogonal frequency-division multiplexing; Schottky diode; selective transmission; self-sustainability; signal conditioning; simultaneous wireless information and power transfer
TL;DR:
An enhanced transmitter architecture designed to condition the transmit signal for improved conversion efficiency is introduced and increased energy gains and full self-sustainability with the introduction of signal conditioning.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 30, 2021
2021 journal article
Towards mmWave V2X in 5G and Beyond to Support Automated Driving
IEICE TRANSACTIONS ON COMMUNICATIONS, E104B(6), 587–603.
author keywords: automated driving; cooperative perception; V2X; V2V; IEEE802.11p; LTE-V2X; millimeter-wave; 5G; IEEE802.11ad/bd; NR-V2X
TL;DR:
The explanations provide detailed rate calculations for this use case and show that millimeter wave is the only technology able to achieve the requirements, including cover-age enhancement and beam alignment.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: June 21, 2021
2021 journal article
Waveform Design and Accurate Channel Estimation for Frequency-Hopping MIMO Radar-Based Communications
IEEE TRANSACTIONS ON COMMUNICATIONS, 69(2), 1244–1258.
author keywords: Radar; Channel estimation; Radar antennas; Timing; Phase shift keying; Frequency estimation; Estimation; Joint communication and sensing (JCAS); dual-function radar communication (DFRC); frequency hopping (FH) MIMO radar; timing offset; channel estimation and AoD
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: March 29, 2021
2020 journal article
Adaptive Virtual Waveform Design for Millimeter-Wave Joint Communication-Radar
IEEE Transactions on Signal Processing, 68, 715–730.
Contributors: P. Kumari *, S. Vorobyov * & *
author keywords: Millimeter wave radar; millimeter wave communication; joint communication-radar; automotive applications; adaptive waveform design; velocity estimation
TL;DR:
Simulations show that an optimal virtual (non-uniform) waveform achieves a significant performance improvement as compared to a uniform waveform, and develops three different MMSE-based optimization problems for the adaptive JCR waveform design.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2020 article
Beamforming optimization of wideband MISO systems in the presence of mutual coupling
2020 54TH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS, AND COMPUTERS, pp. 1338–1341.
author keywords: Mutual Coupling; Multi-band; Beamforming; MISO; Optimization; Wideband Antenna Array
TL;DR:
A mutual information based optimization for a two-port multiple-input single-output (MISO) antenna system is introduced and a complete circuit-level analysis of a compact MISO system in the wideband regime is developed.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: September 7, 2021
2020 journal article
Double-Sequence Frequency Synchronization for Wideband Millimeter-Wave Systems with Few-Bit ADCs
IEEE Transactions on Wireless Communications, 19(2), 1357–1372.
Contributors: D. Zhu *, R. Bendlin*, S. Akoum*, A. Ghosh * & *
author keywords: Synchronization; Frequency synchronization; Estimation; OFDM; Quantization (signal); Distortion; 3GPP; Low-resolution analog-to-digital converter (ADC); millimeter-wave (mmWave); frequency synchronization; 5G; sequence design
TL;DR:
Numerical results reveal that the proposed algorithm can provide a flexible means to estimate CFO in a variety of low-resolution settings and is robust to the quantization distortion.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2020 article
Frequency Synchronization for Low Resolution Millimeter-Wave
2020 54TH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS, AND COMPUTERS, pp. 314–318.
author keywords: Carrier frequency offset; millimeter wave; deep learning; one-bit receivers
TL;DR:
A jointly optimized neural architecture for frequency synchronization from configurable sequences and estimators that can improve estimation performance at low signal to noise ratio (SNR) by up to 8dB at little cost compared to the same estimator without the sequence generator.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: September 7, 2021
2020 journal article
Leveraging Sensing at the Infrastructure for mmWave Communication
IEEE COMMUNICATIONS MAGAZINE, 58(7), 84–89.
Contributors: A. Ali *, N. Gonzalez-Prelcic n, * & A. Ghosh
author keywords: Intelligent sensors; Radar; Radar antennas; Roads; Millimeter wave communication; Antenna arrays
TL;DR:
The use of infrastructure mounted sensors (which will be part of future smart cities) are motivated to aid establishing and maintaining mmWave vehicular communication links to demonstrate that information from these infrastructure sensors reduces the mmWave array configuration overhead.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(Web of Science; OpenAlex)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 24, 2020
2020 article
Linear CE and 1-bit Quantized Precoding With Optimized Dithering
IEEE OPEN JOURNAL OF SIGNAL PROCESSING, Vol. 1, pp. 310–325.
author keywords: 1-bit quantized transmission; massive MIMO; downlink precoding; constant envelope transmission; 1-bit DACs; Bussgang decomposition
TL;DR:
This paper analyzes downlink transmission for low complexity linear precoding and proposes the addition of correlated Gaussian dither to the precoded signal before quantization and subsequent transmission to improve performance for smaller numbers of downlink users.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
9. Industry, Innovation and Infrastructure
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: December 13, 2021
2020 journal article
Revisiting Research on Signal Processing for Communications in a Pandemic [From the Editor]
IEEE Signal Processing Magazine, 37(3), 3–5.
UN Sustainable Development Goal Categories
3. Good Health and Well-being
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2020 journal article
Spatial Channel Covariance Estimation for Hybrid Architectures Based on Tensor Decompositions
IEEE Transactions on Wireless Communications, 19(2), 1084–1097.
Contributors: S. Park *, A. Ali *, N. Gonzalez-Prelcic * & *
author keywords: Tensor decomposition; spatial channel covariance; hybrid precoding; covariance estimation; millimeter wave
TL;DR:
Numerical results and theoretical analysis show that the proposed tensor-based approach achieves higher estimation accuracy in comparison with prior compressive-sensing-based approaches or conventional angle-of-arrival estimation approaches.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2020 journal article
Submitting Columns and Forums to SPM [From the Editor]
IEEE Signal Processing Magazine, 37(1), 3–4.
TL;DR:
Reports on the process of submitting columns and forums to the publication and explains the content that is included therein.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2020 journal article
What Does an Editor-in-Chief of IEEE Signal Processing Magazine Do, Anyway? [From the Editor]
IEEE Signal Processing Magazine, 37(2), 3–4.
TL;DR:
Reports on the role and responsibilities of the Editor-in-Chief of the IEEE Signaling Processing Magazine are reported on.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
A Combined Waveform-Beamforming Design for Millimeter-Wave Joint Communication-Radar
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2019-November, 1422–1426.
Contributors: P. Kumari *, N. Myers *, S. Vorobyov * & *
TL;DR:
Numerical results demonstrate that the JCR design enables the angle-of-arrival/departure estimation of short- range radar targets with a high successful recovery rate and a wide FoV at the expense of a slight loss in the communication rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
A Geometry-aided Message Passing Method for AoA-Based Short Range MIMO Channel Estimation
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2019-July.
Contributors: J. Kaleva*, N. Myers *, A. Tölli * & *
TL;DR:
A geometry-aided message passing algorithm that exploits structure in short range line-of-sight (LoS) channels for spatial sub-Nyquist channel estimation and shows that the LoS MIMO channel can be reconstructed using the derived local AoA estimates and the known transceiver geometry.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
A Noncoherent Space-Time Code from Quantum Error Correction
2019 53rd Annual Conference on Information Sciences and Systems, CISS 2019.
Contributors: S. Lanham *, T. Cuvelier *, C. Ostrove*, B. La Cour *, G. Ott* & *
TL;DR:
This work decomposes the multiple-input multiple-output (MIMO) channel into operators from quantum mechanics, and design a non-coherent space time code using the quantum stabilizer formalism, derive an optimal decoder, and analyze the former through a quantum mechanical lens.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Achievable rates of hybrid architectures with few-bit ADC receivers
WSA 2016 - 20th International ITG Workshop on Smart Antennas, 194–201. http://www.scopus.com/inward/record.url?eid=2-s2.0-85073566890&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2019 conference paper
Analysis of intelligent vehicular relaying in urban 5G+ millimeter-wave cellular deployments
2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings.
Contributors: V. Petrov *, D. Moltchanov *, S. Andreev * & *
TL;DR:
This paper develops a mathematical framework for the performance evaluation of mmWave vehicular relaying in a typical street deployment and analyzes and compares alternative connectivity strategies by quantifying the performance gains made available to smart devices in the presence of mm Wave relays.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Asymptotic Performance of Downlink Massive MIMO with 1-bit Quantized Zero-Forcing Precoding
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2019-July.
Contributors: A. Saxena*, A. Mezghani *, R. Bendlin*, S. Nammi*, * , J. Andrews *, A. Chopra *
TL;DR:
The use of 1-bit DACs for downlink massive MIMO system can significantly reduce base station energy consumption and hardware complexity with the tradeoff being the introduction of nonlinear impairments in the transmitted signal.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Capacity Based Optimization of Compact Wideband Antennas
Proceedings of the 2019 9th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, APWC 2019, 322–325.
Contributors: S. Saab *, A. Mezghani * & *
TL;DR:
A new single port Gamma matching network is presented that enhances the system's spectral efficiency apart from satisfying the antenna’s figures of merit and an in-depth analysis of the designed antenna is provided by using a circuit theoretic approach.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Capacity based analysis of a wideband SIMO system in the presence of mutual coupling
2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings.
Contributors: S. Saab *, A. Mezghani * & *
TL;DR:
This paper introduces a system model that incorporates antenna mutual coupling in the wideband regime, and extracts the noise correlation matrices from two different antenna configurations (parallel and co-linear) to optimize the spacing in each scenario while maximizing the Shannon capacity under transmit power constraint.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Channel Estimation for Orthogonal Time Frequency Space (OTFS) Massive MIMO
IEEE International Conference on Communications, 2019-May.
Contributors: W. Shen *, L. Dai *, S. Han *, I. Chih-Lin * & *
TL;DR:
A 3D structured orthogonal matching pursuit (3D-SOMP) algorithm based channel estimation technique for downlink channel estimation for OTFS massive MIMO.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 journal article
Channel Estimation for Orthogonal Time Frequency Space (OTFS) Massive MIMO
IEEE Transactions on Signal Processing, 67(16), 4204–4217.
author keywords: OTFS; massive MIMO; channel estimation; high-mobility; sparsity
Source: ORCID
Added: September 11, 2020
2019 journal article
Connectivity and Blockage Effects in Millimeter-Wave Air-To-Everything Networks
IEEE Wireless Communications Letters, 8(2), 388–391.
Contributors: K. Han *, K. Huang * & *
author keywords: A2X communications; mmWave networks; blockage effects; network connectivity; stochastic geometry; random shape theory
TL;DR:
This letter proposes an analytical framework to define and characterise the connectivity for an aerial access point (AAP) by jointly using stochastic geometry and random shape theory, and yields guidelines on practical mmWave A2X networks deployment.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Deep Learning Propagation Models over Irregular Terrain
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2019-May, 4519–4523.
Contributors: M. Ribero *, * , H. Vikalo *, D. Chizhik * & R. Valenzuela *
TL;DR:
This work proposes to use machine learning to learn path gain based on terrain elevation as features, and implements different neural network architectures with dense and convolutional layers that could include effects difficult to describe with traditional models.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Detection and Channel Equalization with Deep Learning for Low Resolution MIMO Systems
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2018-October, 1836–1840.
Contributors: A. Klautau*, N. Gonzalez-Prelcic *, A. Mezghani * & *
TL;DR:
An exploration of DL as applied to design the physical layer for MIMO systems with low resolution analog-to-digital converters finds that DL still has potential but more efficient architectures are required, given the convergence problems associated with time-varying channels and 1-bit quantization.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 journal article
Directional Frame Timing Synchronization in Wideband Millimeter-Wave Systems with Low-Resolution ADCs
IEEE Transactions on Wireless Communications, 18(11), 5350–5366.
Contributors: D. Zhu *, R. Bendlin*, S. Akoum*, A. Ghosh * & *
author keywords: Synchronization; Array signal processing; Quantization (signal); Correlation; OFDM; Antenna arrays; Millimeter-wave beamforming; timing synchronization; low-resolution ADC; synchronization SQNR; multi-beam probing
TL;DR:
Numerical results reveal that for wideband mmWave systems with low-resolution ADCs, the timing synchronization performance of the proposed method outperforms the existing approaches due to the improvement in the received synchronization SQNR.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Extremely Large Aperture Massive MIMO: Low Complexity Receiver Architectures
2018 IEEE Globecom Workshops, GC Wkshps 2018 - Proceedings.
Contributors: A. Amiri *, M. Angjelichinoski*, E. De Carvalho * & *
TL;DR:
Drawing inspiration from coded random access, one of the main contributions of the paper is the design of low complexity scheme that exploits the non-stationary nature of xMaMIMO systems and where the data processing is decentralized.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 journal article
FALP: Fast Beam Alignment in mmWave Systems with Low-Resolution Phase Shifters
IEEE Transactions on Communications, 67(12), 8739–8753.
Contributors: N. Myers *, A. Mezghani * & *
author keywords: Perfect arrays; 2D sparse recovery; one-bit phase shifters; magnetic resonance imaging; mm-Wave
TL;DR:
A framework called FALP for Fast beam Alignment with Low-resolution Phase shifters, which uses an efficient set of antenna weight vectors to acquire channel measurements, and allows faster beam alignment when compared to exhaustive scan is presented.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 journal article
Feedback from the IEEE Signal Processing Magazine Board Meeting in 2019
IEEE Signal Processing Magazine, 36(4), 3–4.
TL;DR:
This column summarizes some of the items that were discussed at the ICASSP 2019 editorial board meeting and provides a general overview of the state of the magazine.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Geometric Tracking of Vehicular mmWave Channels to Enable Machine Learning of Onboard Sensors
2018 IEEE Globecom Workshops, GC Wkshps 2018 - Proceedings.
TL;DR:
This work reformulates recent work on geometric-polar tracking into an efficient recursive version and proposes to track the MPCs geometrically, based on algorithms known as Doppler-bearing tracking.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 journal article
TL;DR:
The expected goals that 5G has and has not achieved and what might be coming in 6G cellular networks are discussed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 journal article
Guest Editorial Ultra-Reliable Low-Latency Communications in Wireless Networks
IEEE Journal on Selected Areas in Communications, 37(4), 701–704.
Contributors: M. Kountouris *, P. Popovski *, I. Hou *, S. Buzzi *, A. Müller *, S. Sesia*, *
TL;DR:
Next generation wireless systems, mainly 5G and beyond, are designed to provide wireless connectivity for massive machine-type communications (mMTC) and to support ultra-reliable, low latency communication (URLLC) for mission-critical services.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 journal article
IEEE Signal Processing Magazine and University Rankings [From the Editor]
IEEE Signal Processing Magazine, 36(2), 3–4.
Source: ORCID
Added: September 11, 2020
2019 journal article
Joint Channel-Estimation/Decoding With Frequency-Selective Channels and Few-Bit ADCs
IEEE Transactions on Signal Processing, 67(4), 899–914.
Contributors: P. Sun *, Z. Wang *, * & P. Schniter *
author keywords: Low resolution analog-to-digital converter; millimeter wave; joint channel estimation and equalization; turbo equalization; approximate message passage
TL;DR:
This paper proposes a fast and near-optimal approach to joint channel-estimation, equalization, and decoding of coded single-carrier transmissions over frequency-selective channels with few-bit analog-to-digital converters (ADCs).
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 journal article
LIDAR Data for Deep Learning-Based mmWave Beam-Selection
IEEE Wireless Communications Letters, 8(3), 909–912.
Contributors: A. Klautau*, N. González-Prelcic * & *
author keywords: LIDAR; mmWave; machine learning; deep learning; convolutional networks
TL;DR:
This letter shows how LIDAR data can be used for line-of-sight detection and to reduce the overhead in mmWave beam-selection in the proposed distributed architecture.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 journal article
Linear Receivers in Non-Stationary Massive MIMO Channels with Visibility Regions
IEEE Wireless Communications Letters, 8(3), 885–888.
Contributors: A. Ali *, E. De Carvalho * & *
author keywords: Non-stationary channel analysis; linear precoders; massive MIMO
TL;DR:
A channel model based on VRs is relied on, which provides expressions of the signal-to-interference-plus-noise ratio (SINR) of conjugate beamforming and zero-forcing precoders and an approximate deterministic equivalent of the SINR of ZF precoder.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Linear Transmit Precoding with Optimized Dithering
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2019-November, 838–842.
Contributors: A. Saxena*, A. Mezghani *, * & J. Andrews *
TL;DR:
This paper improves performance and reduce correlation among quantization noise components by adding colored dither to the signal before DAC and estimates the closed form asymptotic expression for per-user signal to quantization, interference and noise ratio (SQINR) of the received signal as a function of the dither power.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Localized Random Sampling for Robust Compressive Beam Alignment
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2019-May, 4644–4648.
Contributors: N. Myers * & *
TL;DR:
This paper shows that restricting the randomness in compressive sampling to local sets can achieve robustness to structured errors due to CFO and requires fewer channel measurements than comparable algorithms and has the same complexity as standard CS.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Low Resolution Millimeter Wave Radar: Bounds and Performance
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2018-October, 554–558.
Contributors: K. Mazher *, A. Mezghani * & *
TL;DR:
An analog preprocessing unit is designed to introduce correlated noise in the system and it is shown that the performance can be improved beyond the 2 dB limit and the potential of the proposed architecture to meet the requirements of high resolution sensing is demonstrated.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 conference paper
MIMO Channel Estimation with Non-Ideal ADCS: Deep Learning Versus GAMP
IEEE International Workshop on Machine Learning for Signal Processing, MLSP, 2019-October.
Contributors: M. Takeda*, A. Klautau*, A. Mezghani * & *
TL;DR:
DL applied to channel estimation of MIMO systems with low resolution analog-to-digital converters (ADCs) indicates that a single neural network trained in a range of practical conditions is more robust to ADC impairments than a GAMP variant.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
MIMO beampattern and waveform design with low resolution DACs
2019 IEEE Radar Conference, RadarConf 2019.
Contributors: A. Mezghani * & *
TL;DR:
A sum of squared residuals (SSR) formulation for the beampattern and spectral shaping problem is solved based on the Generalized Approximate Message Passing (GAMP) algorithm and numerical results demonstrate good performance in terms of spectral shaping as well as cross-correlation properties of the different probing waveforms even with just 2-bit resolution per antenna.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 journal article
Making a Good Feature Article Submission [From the Editor]
IEEE Signal Processing Magazine, 36(5), 3–4.
Source: ORCID
Added: September 11, 2020
2019 journal article
Message Passing-Based Joint CFO and Channel Estimation in mmWave Systems with One-Bit ADCs
IEEE Transactions on Wireless Communications, 18(6), 3064–3077.
Contributors: N. Myers * & *
author keywords: Wideband channel estimation; carrier frequency offset; compressed sensing; message passing; one-bit receivers; mm-Wave
TL;DR:
This paper develops a joint carrier frequency offset and wideband channel estimation algorithm that is scalable across different hardware architectures and exploits the sparse nature of mmWave channels in the angle-delay domain, in addition to the compressibility of the phase error vector.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Millimeter wave V2X communications: Use cases and design considerations of beam management
Asia-Pacific Microwave Conference Proceedings, APMC, 2018-November, 183–185.
Contributors: T. Shimizu *, V. Va *, G. Bansal* & *
TL;DR:
Millimeter wave (mmWave) communication has the potential to meet the high data rate demand thanks to its wide bandwidth and this paper introduces potential use cases and elaborate on how to utilize low-frequency communication, onboard sensors mounted at vehicles and infrastructures, and DSRC messages to facilitate mmWave V2X beam management.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 journal article
MmWave Vehicular Beam Selection with Situational Awareness Using Machine Learning
IEEE Access, 7, 87479–87493.
Contributors: Y. Wang *, A. Klautau, M. Ribero *, A. Soong* & *
author keywords: MmWave; beam alignment; situational awareness; machine learning
TL;DR:
The numerical results show that situational awareness-assisted beam selection using machine learning is able to provide beam prediction, with accuracy that increases with more complete knowledge of the environment.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
MmWave Vehicular Beam Training with Situational Awareness by Machine Learning
2018 IEEE Globecom Workshops, GC Wkshps 2018 - Proceedings.
Contributors: Y. Wang *, A. Klautau*, M. Ribero *, M. Narasimha* & *
TL;DR:
This paper proposes to learn the optimal beam pair index by exploiting the locations and sizes of the receiver and its neighboring vehicles, leveraging machine learning tools with the past beam training records.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 journal article
Modeling and Analysis of MmWave V2X Networks with Vehicular Platoon Systems
IEEE Journal on Selected Areas in Communications, 37(12), 2851–2866.
Contributors: W. Yi *, Y. Liu *, Y. Deng *, A. Nallanathan * & *
author keywords: Vehicle-to-everything; Probability density function; Millimeter wave communication; Numerical models; Stochastic processes; Matern hard-core process; millimeter wave; stochastic geometry; user association techniques; vehicular platoon systems; vehicle-to-everything networks
TL;DR:
An effective spatial framework for mmWave vehicle-to-everything (V2X) networks with VPSs is proposed by utilizing stochastic geometry approaches and the numerical results illustrate that platoons outperform individual vehicles in terms of road spectral efficiency and the considered system is LOS interference-limited.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 journal article
Multibeam for joint communication and radar sensing using steerable analog antenna arrays
IEEE Transactions on Vehicular Technology, 68(1), 671–685.
Contributors: J. Zhang *, X. Huang *, Y. Guo, J. Yuan * & *
author keywords: Joint communication and radar sensing; beamforming; multibeam; compressive sensing
TL;DR:
A novel multibeam framework using steerable analog antenna arrays, which allows seamless integration of communication and sensing and develops sensing parameter estimation algorithms using conventional digital Fourier transform and one-dimensional compressive sensing techniques, matching well with the proposed framework.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
On the Violation of Hard Deadlines in Networked Control Systems
IEEE International Conference on Communications, 2019-May.
Contributors: R. Jurdi *, J. Andrews * & *
TL;DR:
A closed-form expression is calculated for the probability of hard-deadline violation when there are two agents and upper and lower bounds on this probability are found when there is more agents, which reflects the reliability of the system.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 journal article
Online Learning for Position-Aided Millimeter Wave Beam Training
IEEE Access, 7, 30507–30526.
Contributors: V. Va *, T. Shimizu *, G. Bansal* & *
author keywords: Millimeter wave; beam alignment; beam refinement; position-aided; online learning; multi-armed bandit; risk-aware learning
TL;DR:
This paper uses a multi-armed bandit framework to develop the online learning algorithms for beam pair selection and refinement, which uses the upper confidence bound with a newly proposed risk-aware feature, while the beam refinement uses a modified optimistic optimization algorithm.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 journal article
Optimal Frequency-Flat Precoding for Frequency-Selective Millimeter Wave Channels
IEEE Transactions on Wireless Communications, 18(11), 5098–5112.
Contributors: K. Venugopal *, N. Gonzalez-Prelcic * & *
author keywords: Antenna arrays; MIMO communication; OFDM; Frequency estimation; Estimation; Receiving antennas; Transmitting antennas; Millimeter wave communications; hybrid architecture; compressive subspace estimation; antenna beam-squint; frequency-selective systems; optimal precoders
TL;DR:
This paper evaluates the conditions and practical settings under which the dominant subspaces of the frequency-domain channel matrices are similar and shows that under some assumptions, semi-unitary frequency-flat precoding and combining are sufficient for low-scattering millimeter wave channels.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 journal article
Organizing a Special Issue of IEEE SPM [From the Editor]
IEEE Signal Processing Magazine, 36(6), 3–4.
TL;DR:
The process of organizing a special issue (SI) for IEEE Signal Processing Magazine (SPM) is discussed and more information is provided about the decision-making process so that authors understand how to have an article accepted.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 journal article
Outage of Periodic Downlink Wireless Networks with Hard Deadlines
IEEE Transactions on Communications, 67(2), 1238–1253.
Contributors: R. Jurdi *, S. Khosravirad *, H. Viswanathan *, J. Andrews * & *
author keywords: Ultra-reliability; low-latency; mission-critical; time-sensitive networking; machine-to-machine; industrial; IoT; 5G; URLLC; mMTC; TSN
TL;DR:
A novel variable-rate transmission method is proposed that eliminates time overflow in a downlink periodic wireless communications system, where multiple access points cooperatively transmit packets to a number of devices, e.g., actuators in an industrial control system.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Performance of linear receivers for wideband massive MIMO with one-bit ADCs
WSA 2016 - 20th International ITG Workshop on Smart Antennas, 509–515. http://www.scopus.com/inward/record.url?eid=2-s2.0-85073575189&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2019 conference paper
Position and LIDAR-Aided mmWave Beam Selection using Deep Learning
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2019-July.
Contributors: M. Dias*, A. Klautau*, N. Gonzalez-Prelcic * & *
TL;DR:
Using co-simulation of communications and LIDAR in a vehicle-to-infrastructure (V2I) scenario, it is found that the distributed LidAR-based architecture provides robust performance irrespective of car penetration rate, outperforming the single LIDar at BS and position-based solutions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Robust analog precoding designs for millimeter wave MIMO transceivers
WSA 2016 - 20th International ITG Workshop on Smart Antennas, 8–15. http://www.scopus.com/inward/record.url?eid=2-s2.0-85073573477&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2019 conference paper
Selective OFDM transmission for simultaneous wireless information and power transfer
2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings.
TL;DR:
This paper proposes, analyzes, and compares the functionality of a novel selective orthogonal frequency-division multiplexing (OFDM) receiver architecture and evaluates the rate-energy (R-E) tradeoff of the system.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Short Range 3D MIMO mmWave Channel Reconstruction via Geometry-aided AoA Estimation
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2019-November, 427–431.
TL;DR:
This work considers parametrized spatial channel estimation, where the known antenna array geometry is exploited to recover the angle-of-arrivals (AoAs) of the 3D multiple-input multiple-output (MIMO) channel and proposes a lower complexity message passing algorithm for short range channel estimation.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Side-information-aided non-coherent beam alignment design for millimeter wave systems
Proceedings of the International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc), 341–350.
Contributors: Y. Zhang *, K. Patel*, S. Shakkottai * & *
author keywords: 60 GHz; Beam Alignment; Non-Coherent; Compressive Phase Retrieval; Side Information; Prototyping; Calibration
TL;DR:
This work leverage side information in the form of prior knowledge of the angular support of the propagation channel (direction information) to design a compressive sensing (CS) based beam alignment algorithm that enables generations of precise desired beam patterns.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 journal article
Spatial Covariance Estimation for Millimeter Wave Hybrid Systems Using Out-of-Band Information
IEEE Transactions on Wireless Communications, 18(12), 5471–5485.
Contributors: A. Ali *, N. Gonzalez-Prelcic * & *
author keywords: Covariance estimation; out-of-band information; hybrid analog-digital precoding; millimeter-wave communications; subspace perturbation analysis
TL;DR:
This work uses the sub-6 GHz channel covariance as an out-of-band side information for mmWave link configuration as well as proposed covariance estimation strategies to reduce the training overhead compared to the in-band only covariance estimating.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Spatial Zadoff-Chu Modulation for Rapid Beam Alignment in mmWave Phased Arrays
2018 IEEE Globecom Workshops, GC Wkshps 2018 - Proceedings.
Contributors: N. Myers *, A. Mezghani * & *
TL;DR:
This work proposes to use shifted Zadoff-Chu (ZC) sequences in the antenna domain to realize efficient CS matrices for channel estimation or beam alignment and proves that the shifted ZC-based CS matrix satisfies the restricted isometry property with high probability.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Spatial channel covariance estimation for the hybrid architecture at a base station: A tensor-decomposition-based approach
2018 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2018 - Proceedings, 1008–1012.
Contributors: S. Park *, A. Ali *, N. Gonzalez-Prelcic * & *
TL;DR:
A spatial channel covariance estimation method for spatially sparse time-varying frequency-selective channels that leverages the fact that the channel can be represented as a low-rank higher-order tensor.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 journal article
Swift-Link: A Compressive Beam Alignment Algorithm for Practical mmWave Radios
IEEE Transactions on Signal Processing, 67(4), 1104–1119.
Contributors: N. Myers *, A. Mezghani * & *
author keywords: Compressive beam training; carrier frequency offset; robust beam alignment; low-complexity sparse self-calibration; robust compressive sensing; mmWave
TL;DR:
Swift-Link is presented, a fast beam alignment algorithm that is robust against the offset and uses fewer channel measurements than comparable CS algorithms and has analytical guarantees.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Tensor-based Estimation of mmWave MIMO Channels with Carrier Frequency Offset
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2019-May, 4155–4159.
Contributors: L. Ribeiro*, A. De Almeida *, N. Myers * & *
TL;DR:
Simulation results indicate that the proposed joint CFO and channel estimation method based on tensor modeling and compressed sensing yields better channel recovery performance than the benchmark and that it is more robust to a small number of channel measurements.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 conference paper
Towards Robustness: Machine Learning for MmWave V2X with Situational Awareness
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2018-October, 1577–1581.
Contributors: Y. Wang *, M. Narasimha* & *
TL;DR:
This paper proposes to recommend a set of candidate beam pairs using machine learning classification and ranking, based on the target vehicle’s situational awareness, to reduce overhead beam search overhead by 70% when seven beams are recommended.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2019 journal article
Vehicular applications of signal processing
IEEE Signal Processing Magazine, 36(1), 3–6.
TL;DR:
This editorial reviews some applications of signal processing in vehicular systems and focuses specifically on applications that are pertinent to automated driving (the so-called higher levels of automation).
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
5G MIMO data for machine learning: Application to beam-selection using deep learning
2018 Information Theory and Applications Workshop, ITA 2018.
Contributors: A. Klautau*, P. Batista *, N. Gonzalez-Prelcic *, Y. Wang * & *
TL;DR:
A methodology is presented that combines a vehicle traffic simulator with a ray-tracing simulator, to generate channel realizations representing 5G scenarios with mobility of both transceivers and objects to investigate beam-selection techniques on vehicle-to-infrastructure using millimeter waves.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 conference paper
A Low Complexity ML Detection for Uplink Massive MIMO Systems with One-Bit ADCs
IEEE Vehicular Technology Conference, 2018-June, 1–5.
TL;DR:
A low complexity maximum likelihood detection (MLD) algorithm called one-bit-sphere- decoding for an uplink massive multiple-input multiple- output (MIMO) system with one- bit analog-to-digital converters (ADCs).
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
A Model for Infrastructure Sharing in mmWave Cellular Networks
IEEE International Conference on Communications, 2018-May.
TL;DR:
An interesting observation is that sharing spectrum and infrastructure yields a higher rate coverage probability for higher rate thresholds, but has a lower coverage for lower thresholds, which suggests that networks catering for low-rate, limited-QoS devices, are at a disadvantage when Spectrum and infrastructure are shared.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 journal article
A New Look at Physical Layer Security, Caching, and Wireless Energy Harvesting for Heterogeneous Ultra-Dense Networks
IEEE Communications Magazine, 56(6), 49–55.
Contributors: L. Wang *, K. Wong*, S. Jin, G. Zheng * & *
TL;DR:
The benefits of heterogeneous ultra-dense network architecture are investigated from the perspectives of three promising technologies, physical layer security, caching, and wireless energy harvesting, and opportunities and challenges are identified to advance the research in this emerging network.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 conference paper
A UAV-Based Traffic Monitoring System - Invited Paper
IEEE Vehicular Technology Conference, 2018-June, 1–5.
Contributors: H. Niu *, N. González-Prelcic * & *
TL;DR:
An aerial traffic monitoring system that uses unmanned aerial vehicles and onboard cameras to capture traffic video, which is sent and processed in the cloud and concluded that the designed system can monitor traffic with high accuracy and flexibility.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 conference paper
A compressive sensing-maximum likelihood approach for off-grid wideband channel estimation at mmWave
2017 IEEE 7th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMSAP 2017, 2017-December, 1–5.
Contributors: J. Rodríguez-Fernández*, N. González-Prelcic * & *
TL;DR:
A mixed compressed sensing-maximum likelihood algorithm that uses continuous dictionaries to estimate the channel, enhancing estimation performance without resorting to very large dictionaries.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
4. Quality Education
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 journal article
Algorithms for the construction of incoherent frames under various design constraints
Signal Processing, 152, 363–372.
Contributors: C. Rusu *, N. González-Prelcic * & *
author keywords: Grassmannian frames; Coherence; Compressed sensing
Source: ORCID
Added: September 11, 2020
2018 journal article
Analysis of Blockage Sensing by Radars in Random Cellular Networks
IEEE Signal Processing Letters, 25(11), 1620–1624.
Contributors: J. Park * & *
author keywords: Radars; stochastic geometry; cellular networks; blockage sensing
TL;DR:
The detection probability of blockage sensing by radars deployed on towers in cellular networks is characterized by modeling radar and blockage locations using stochastic geometry and derive the detection probability as a function of the system parameters.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Automotive radar using IEEE 802.11p signals
IEEE Wireless Communications and Networking Conference, WCNC, 2018-April, 1–6.
Contributors: K. Usman *, * , T. Shimizu & G. Bansal
TL;DR:
This paper develops a framework for using the dedicated short range communication (DSRC) waveform for the purposes of automotive radar using the frequency domain channel estimates generated by the OFDM physical layer used in DSRC.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Beamforming in Millimeter Wave Systems: Prototyping and Measurement Results
IEEE Vehicular Technology Conference, 2018-August.
Contributors: C. Scarborough *, K. Venugopal *, A. Alkhateeb * & *
TL;DR:
The design of a proof-of-concept prototype that demonstrates the feasibility of large antenna array beamforming gains in practice is explained in detail and a mmWave system with digitally controlled analog front-end is developed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Channel Estimation and Hybrid Precoding for Frequency Selective Multiuser mmWave MIMO Systems
IEEE Journal on Selected Topics in Signal Processing, 12(2), 353–367.
Contributors: J. Gonzalez-Coma *, J. Rodriguez-Fernandez*, N. Gonzalez-Prelcic *, L. Castedo * & *
author keywords: Antenna arrays; compressive estimation; frequency selective channel; hybrid precoding; millimeter wave MIMO; MMSE; multiuser; OFDM
TL;DR:
A system that uses compressive estimation on the uplink to configure precoders and combiners for the downlink in a millimeter wave multiuser multiple-input multiple-output system is developed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Channel Estimation in Broadband Millimeter Wave MIMO Systems with Few-Bit ADCs
IEEE Transactions on Signal Processing, 66(5), 1141–1154.
Contributors: J. Mo *, P. Schniter * & *
author keywords: Low resolution analog-to-digital converter; millimeter wave; channel estimation; approximate message passing
TL;DR:
A broadband channel estimation algorithm for millimeter wave (mmWave) multiple input multiple output (MIMO) systems with few-bit analog-to-digital converters (ADCs) that exploits the joint sparsity of the mmWave MIMO channel in the angle and delay domains is developed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Channel estimation for millimeter wave MIMO systems in the presence of CFO uncertainties
IEEE International Conference on Communications, 2018-May.
Contributors: J. Rodríguez-Fernández*, N. González-Prelcic * & *
TL;DR:
Simulation results show that small estimation errors and near-optimal values of spectral efficiency can be achieved without incurring in significant overhead and/or computational complexity.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 journal article
Channel feedback based on AoD-adaptive subspace codebook in FDD massive MIMO systems
IEEE Transactions on Communications, 66(11), 5235–5248.
author keywords: Massive MIMO; FDD; channel feedback; subspace codebook; AoD
TL;DR:
This work proposes an angle-of-departure (AoD) adaptive subspace codebook for channel feedback in FDD massive MIMO systems and compares the proposed quantized feedback technique using the AoD-adaptive sub space codebook with a comparable analog feedback method.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Compressive Sensing for Millimeter Wave Antenna Array Diagnosis
IEEE Transactions on Communications, 66(6), 2708–2721.
Contributors: M. Eltayeb*, T. Al-Naffouri * & *
author keywords: Antenna arrays; fault diagnosis; compressed sensing; millimeter wave communication
TL;DR:
Numerical results show that the proposed techniques provide satisfactory results in terms of fault detection with reduced number of measurements (diagnosis time) provided that the number of blockages is small compared to the array size.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Directional timing synchronization in wideband millimeter wave cellular systems with low-resolution ADCs
Conference Record of 51st Asilomar Conference on Signals, Systems and Computers, ACSSC 2017, 2017-October, 37–41.
Contributors: D. Zhu * & *
TL;DR:
A new beamforming strategy for millimeter-wave systems to improve the frame timing synchronization performance under low-resolution analog-to-digital converters outperforms the existing approach due to the improvement in the received synchronization SQNR.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 journal article
Ergodic Rate of Millimeter Wave Ad Hoc Networks
IEEE Transactions on Wireless Communications, 17(2), 914–926.
author keywords: Millimeter wave communication; wireless networks; ad hoc networks; device-to-device communication
TL;DR:
The results show that even relatively small errors in alignment can lead to significant ergodic rate reduction, and a scaling law for uniform mm-wave ad hoc networks is derived and a heuristic scaling for clustered networks is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Erratum: Deep convolutional neural models for picture-quality prediction (IEEE Signal Processing Magazine (2017) 34: 6 (130-141) DOI: 10.1109/MSP.2017.2736018)
IEEE Signal Processing Magazine, 35(5), 186.
Source: ORCID
Added: September 11, 2020
2018 conference paper
Fast link configuration for mmwave multiuser MIMO downlink using spatial AoD angular supports
IEEE Vehicular Technology Conference, 2017-September, 1–2.
TL;DR:
This paper assumes that from the sensors (aside from the relevant technology) the angular support information for the LoS link of each vehicle is known to the RSU in prior and it proposes a fast link configuration method using theangular support information.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Feedback Design for Multi-Antenna K-Tier Heterogeneous Downlink Cellular Networks
IEEE Transactions on Wireless Communications, 17(6), 3861–3876.
author keywords: Heterogeneous cellular network; limited feedback; stochastic geometry
TL;DR:
In the non-cooperative case, the feedback is only useful in a particular tier if the mean interference is small enough; in the cooperative case, allocating more feedback to stronger intra-cluster BSs is efficient; and in both cases, the obtained solutions do not change depending on the instantaneous signal-to-interference ratio.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Forward Collision Vehicular Radar with IEEE 802.11: Feasibility Demonstration Through Measurements
IEEE Transactions on Vehicular Technology, 67(2), 1404–1416.
author keywords: Automotive applications; OFDM modulation; radar applications; radar
TL;DR:
The results of this paper show that the solution delivers sufficient accuracy and reliability for vehicular RADAR if the largest bandwidth available to IEEE 802.11p is used, which indicates significant potential for industrial devices with joint vehicular communications and radar capabilities.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Frequency-Domain Compressive Channel Estimation for Frequency-Selective Hybrid Millimeter Wave MIMO Systems
IEEE Transactions on Wireless Communications, 17(5), 2946–2960.
Contributors: J. Rodriguez-Fernandez*, N. Gonzalez-Prelcic *, K. Venugopal * & *
author keywords: Wideband channel estimation; millimeter wave MIMO; hybrid architecture
TL;DR:
This paper considers a frequency-selective mm-wave channel and proposes compressed sensing-based strategies to estimate the channel in the frequency domain and evaluates different algorithms and compute their complexity to expose tradeoffs in complexity overhead performance as compared with those of previous approaches.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Frequency-domain wideband channel estimation and tracking for hybrid MIMO systems
Conference Record of 51st Asilomar Conference on Signals, Systems and Computers, ACSSC 2017, 2017-October, 1829–1833.
TL;DR:
An algorithm for channel tracking which updates the channel estimation in the previous frame reducing the training overhead required and an strategy to update the precoders and combiners from the output of the channel tracking stage is developed.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 journal article
GlobalSIP and beyond [From the Editor]
IEEE Signal Processing Magazine, 35(5), 3–15.
Source: ORCID
Added: September 11, 2020
2018 journal article
High-resolution angle tracking for mobile wideband millimeter-wave systems with antenna array calibration
IEEE Transactions on Wireless Communications, 17(11), 7173–7189.
Contributors: D. Zhu *, J. Choi *, Q. Cheng *, W. Xiao * & *
author keywords: Millimeter-wave systems; auxiliary beam pair; angle/beam tracking; antenna array calibration; high mobility
TL;DR:
Numerical results reveal that by employing the proposed methods, good angle tracking performance can be achieved under various antenna array configurations, channel models, and mobility conditions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 journal article
Highlights from the IEEE SPM's Editorial Board Meeting [From the Editor]
IEEE Signal Processing Magazine, 35(4), 3–4.
Source: ORCID
Added: September 11, 2020
2018 journal article
IEEE 802.11ad-Based Radar: An Approach to Joint Vehicular Communication-Radar System
IEEE Transactions on Vehicular Technology, 67(4), 3012–3027.
Contributors: P. Kumari *, J. Choi *, N. Gonzalez-Prelcic * & *
author keywords: Automotive radar; IEEE 802.11ad; millimeter wave communication; millimeter wave radar; performance analysis; vehicular communications
TL;DR:
The proposed IEEE 802.11ad-based radar meets the minimum accuracy/resolution requirement of range and velocity estimates for LRR applications and exploits the preamble of a single-carrier physical layer frame, which consists of Golay complementary sequences with good correlation properties that make it suitable for radar.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Identifying coverage holes: Where to densify?
Conference Record of 51st Asilomar Conference on Signals, Systems and Computers, ACSSC 2017, 2017-October, 1417–1421.
Contributors: R. Jurdi *, J. Andrews *, D. Parsons & *
TL;DR:
A methodology to identify coverage holes in cellular markets, given demographic and socio-economic information of the population, detailed knowledge of the current macro-cellular infrastructure, and the spectrum capabilities of a cellular operator is developed.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Impact of correlation between link blockages on macro-diversity gains in mmWave Networks
2018 IEEE International Conference on Communications Workshops, ICC Workshops 2018 - Proceedings, 1–6.
Contributors: A. Gupta *, J. Andrews * & *
TL;DR:
A framework for determining the LOS probability when taking into account the correlation between blockages is developed, showing that the BS density must scale as the square of the blockage density to maintain a given level of LOS probabilities.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Impact of measurement noise on millimeter wave beam alignment using beam subsets
IEEE Wireless Communications Letters, 7(5), 784–787.
Contributors: V. Va *, J. Choi *, T. Shimizu *, G. Bansal* & *
author keywords: Millimeter wave; vehicular communication; 5G mobile communication; position-aided beam alignment
TL;DR:
This letter derives bounds on performance degradation due to measurement noise in millimeter wave beam alignment methods that train a subset of beam pairs from the union bound and pairwise beam selection error for a wideband channel.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 journal article
Introducing the New Editorial Team of IEEE Signaling Processing Magazine [From the Editor]
IEEE Signal Processing Magazine, 35(3), 4–5.
Source: ORCID
Added: September 11, 2020
2018 journal article
Inverse multipath fingerprinting for millimeter wave V2I beam alignment
IEEE Transactions on Vehicular Technology, 67(5), 4042–4058.
Contributors: V. Va *, J. Choi *, T. Shimizu *, G. Bansal* & *
author keywords: Millimeter wave; vehicular communication; 5G mobile communication; beam alignment; position-aided
TL;DR:
This paper proposes to use the vehicle's position to query a multipath fingerprint database, which provides prior knowledge of potential pointing directions for reliable beam alignment, the inverse of fingerprinting localization.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Joint CFO and channel estimation in millimeter wave systems with one-bit ADCs
2017 IEEE 7th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMSAP 2017, 2017-December, 1–5.
Contributors: N. Myers * & *
Source: ORCID
Added: September 11, 2020
2018 conference paper
Joint channel-estimation/decoding with frequency-selective channels and few-bit ADCs
Conference Record of 51st Asilomar Conference on Signals, Systems and Computers, ACSSC 2017, 2017-October, 1824–1828.
Contributors: P. Sun *, Z. Wang *, * & P. Schniter *
TL;DR:
This work proposes a fast and near-optimal approach to joint channel-estimation, equalization, and decoding of coded single-carrier transmissions over frequency-selective channels with few-bit analog-to-digital converters (ADCs).
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 journal article
Limited Feedback in Single and Multi-User MIMO Systems with Finite-Bit ADCs
IEEE Transactions on Wireless Communications, 17(5), 3284–3297.
Contributors: J. Mo * & *
author keywords: Low resolution analog-to-digital converter; mm-wave; massive MIMO; limited feedback
Source: ORCID
Added: September 11, 2020
2018 conference paper
Low Resolution Sampling for Joint Millimeter-Wave MIMO Communication-Radar
2018 IEEE Statistical Signal Processing Workshop, SSP 2018, 801–805.
Contributors: P. Kumari *, K. Mazher *, A. Mezghani * & *
TL;DR:
Numerical results demonstrate the potential of the millimeter-wave MIMO concept to meet the challenging requirements of next-generation vehicles.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Low-Overhead Receiver-Side Channel Tracking for Mmwave Mimo
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2018-April, 3859–3863.
Contributors: K. Upadhya *, S. Vorobyov * & *
TL;DR:
Under certain conditions on the transmit precoder, it is shown that the receiver-side channel subspace can be estimated during data transmission without knowing the structure of the precoder or the transmitted data.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Macrodiversity in Cellular Networks with Random Blockages
IEEE Transactions on Wireless Communications, 17(2), 996–1010.
Contributors: A. Gupta *, J. Andrews * & *
TL;DR:
A framework for determining the LOS probability as a function of the number of BSs is developed, when taking into account the correlation between blockages: for example, a single blockage close to the device—including the user’s own body—could block multiple BSs.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Making Papers, Code, and Data Accessible [From the Editor]
IEEE Signal Processing Magazine, 35(6), 3–4.
Source: ORCID
Added: September 11, 2020
2018 journal article
Millimeter Wave Beam-Selection Using Out-of-Band Spatial Information
IEEE Transactions on Wireless Communications, 17(2), 1038–1052.
Contributors: A. Ali *, N. González-Prelcic * & *
author keywords: Millimeter wave communications; beam-selection; out-of-band information; weighted compressed sensing; structured random codebooks
TL;DR:
This paper outlines a strategy to extract spatial information from sub-6 GHz and its use in mmWave compressed beam-selection and outlines a structured precoder/combiner design to tailor the training to out-of-band information.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
MmWave Beam Prediction with Situational Awareness: A Machine Learning Approach
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2018-June.
Contributors: Y. Wang *, M. Narasimha* & *
TL;DR:
This paper combines machine learning tools and situational awareness to learn the beam information (power, optimal beam index, etc) from past observations and leverages regression models to predict the received power with different beam power quantizations.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
MmWave MU-MINO for aerial networks
Proceedings of the International Symposium on Wireless Communication Systems, 2018-August.
Contributors: T. Cuvelier * & *
Source: ORCID
Added: September 11, 2020
2018 journal article
MmWave Vehicle-to-Infrastructure Communication: Analysis of Urban Microcellular Networks
IEEE Transactions on Vehicular Technology, 67(8), 7086–7100.
Contributors: Y. Wang *, K. Venugopal *, A. Molisch * & *
author keywords: Coverage analysis; Manhattan microcells; mmWave; vehicle-to-infrastructure
TL;DR:
A pathloss model inspired by measurements is used, which uses a Manhattan distance path Loss model and accounts for differences in pathloss exponents and losses when turning corners, and derives the coverage probability under certain BS association rules to obtain closed-form solutions without much complexity.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Multi-cell coordination in K-tier heterogeneous downlink cellular networks: Dynamic clustering and feedback allocation
2018 16th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2018.
Contributors: J. Park *, N. Lee & *
TL;DR:
The ergodic spectral efficiency of a cooperative type of K-tier heterogeneous networks (HetNets) with limited feedback is characterized and a feedback allocation problem is formulated and a solution to improve the spectral efficiency is obtained.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
One-bit sphere decoding for uplink massive MIMO systems with one-bit ADCs
IEEE Transactions on Wireless Communications, 17(7), 4509–4521.
author keywords: Massive MIMO; one-bit ADC; multiuser detection; sphere decoding; maximum likelihood detection
TL;DR:
Simulation results demonstrate that the proposed algorithm achieves near-MLD performance, while reducing the computational complexity compared to the existing MLD method.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Optimization of 2-element arrays of circular patch antennas in spatially correlated MIMO channels
2006 International Waveform Diversity and Design Conference, WDD 2006 - Proceedings, 2018-January, 1–9.
TL;DR:
A new definition of the spatial correlation coefficient suitable for analysis of MIMO arrays exploiting pattern diversity, in clustered channel models is introduced and the average and outage capacity performance of CPAs in realistic propagation scenarios are derived.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Optimization of power transfer efficiency and energy efficiency for wireless-powered systems with massive MIMO
IEEE Transactions on Wireless Communications, 17(11), 7159–7172.
Contributors: T. Khan *, A. Yazdan* & *
author keywords: Energy efficiency; power transfer efficiency; wireless power transfer; wireless-powered communications; massive MIMO; energy harvesting; wireless information and power transfer
TL;DR:
The overall power transfer efficiency (PTE) and the energy efficiency (EE) of a wirelessly powered massive MIMO system are investigated, where a multi-antenna base-station (BS) uses wireless energy transfer to charge single-ant Jenna energy harvesting users on the downlink.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 journal article
Out-of-Band Radiation from Large Antenna Arrays
IEEE Communications Magazine, 56(4), 196–203.
Contributors: C. Mollen*, E. Larsson *, U. Gustavsson *, T. Eriksson* & *
TL;DR:
It is drawn that, compared to legacy systems, less stringent linearity requirements can be used in many systems with large arrays by virtue of the lower transmit power needed.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Position-aided compressive channel estimation and tracking for millimeter wave multi-user MIMO Air-to-Air Communications
2018 IEEE International Conference on Communications Workshops, ICC Workshops 2018 - Proceedings, 1–6.
Contributors: J. Rodríguez-Fernández*, N. González-Prelcic * & *
TL;DR:
A channel estimation and tracking strategy based on compressed sensing tools is developed which introduces a low overhead, even when operating in the high mobility aerial scenario, and provides channel state information (CSI) of enough quality to obtain and maintain near-optimal values of spectral efficiency.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Position-aided millimeter wave V2I beam alignment: A learning-to-rank approach
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, 2017-October, 1–5.
Contributors: V. Va *, T. Shimizu *, G. Bansal* & *
TL;DR:
This paper proposes to leverage a vehicle's position along with past beam measurements to rank desirable pointing directions that can reduce the required beam training to a small set of pointing directions.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Research Gems Found Digging with Industry [From the Editor]
IEEE Signal Processing Magazine, 35(2).
Source: ORCID
Added: September 11, 2020
2018 conference paper
Securing mmWave vehicular communication links with multiple transmit antennas
2018 IEEE International Conference on Communications Workshops, ICC Workshops 2018 - Proceedings, 1–6.
TL;DR:
Theoretical and simulation results demonstrate the validity and effectiveness of the proposed technique and show that high secrecy throughput can be achieved when compared to directional array transmission techniques.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Sparsity-aware adaptive beamforming design for IEEE 802.11ad-based joint communication-radar
2018 IEEE Radar Conference, RadarConf 2018, 923–928.
Contributors: P. Kumari *, M. Eltayeb* & *
TL;DR:
A sparsity-aware beamforming design is proposed that permits a trade-off between communication rate and radar detection/estimation performance in the angular domain and subset size optimization enables the detection of short-range radar targets with high probability and angular resolution in a wide FoV at the expense of a slight hit in the communication data rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Spatial Channel Covariance Estimation for the Hybrid MIMO Architecture: A Compressive Sensing-Based Approach
IEEE Transactions on Wireless Communications, 17(12), 8047–8062.
Contributors: S. Park * & *
author keywords: Spatial channel covariance; hybrid precoding; compressive sensing
TL;DR:
Two approaches to covariance estimation based on compressive sensing techniques are proposed, one is to apply a time-varying sensing matrix, and the other is to exploit the prior knowledge that the covariance matrix is Hermitian.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 journal article
Taking the Next Step for IEEE Signal Processing Magazine [From the Editor]
IEEE Signal Processing Magazine, 35(1).
Source: ORCID
Added: September 11, 2020
2018 conference paper
The information and wave-theoretic limits of analog beamforming
2018 Information Theory and Applications Workshop, ITA 2018.
Contributors: A. Mezghani * & *
TL;DR:
This work considers a broadband frequency dependent array model that explicitly includes incremental time shifts instead of phase shifts between the individual antennas and incorporates a physically defined radiated power and presents a novel joint approach for designing the optimal waveform and beamforming vector for analog beamforming.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Tracking abruptly changing channels in mmWave systems using overlaid data and training
2017 IEEE 7th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMSAP 2017, 2017-December, 1–5.
Contributors: K. Upadhya *, * & S. Vorobyov *
TL;DR:
A sparse Bayesian learning-based approach is employed for jointly estimating the channel and data at the receiver by overlaying pilot and data transmissions in millimeter-wave multiple-input multiple-output links.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Vehicle-to-Vehicle Communication for Autonomous Vehicles: Safety and Maneuver Planning
IEEE Vehicular Technology Conference, 2018-August.
Contributors: A. Ali *, L. Jiang *, S. Patil *, J. Li * & *
TL;DR:
This work quantifies the gains vehicle-to-vehicle (V2V) communication can provide for AVs and indicates that V2V can reduce a significant fraction of AV collisions and considerably reduce the maneuver completion time.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2018 conference paper
Virtual Pulse Design for IEEE 802.11AD-Based Joint Communication-Radar
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2018-April, 3315–3319.
Contributors: P. Kumari *, * & S. Vorobyov *
TL;DR:
A coprime-based pulse design approach for IEEE 802.11ad-based radar is proposed that uses only a few non-uniformly placed preambles to construct several virtual pulses for enhancing the velocity estimation accu-racy/resolution as compared to the conventional approach without sacrificing the communication data rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
A Stochastic Geometry Analysis of Large-Scale Cooperative Wireless Networks Powered by Energy Harvesting
IEEE Transactions on Communications, 65(8), 3343–3358.
Contributors: T. Khan *, P. Orlik *, K. Kim *, * & K. Sawa*
author keywords: Energy harvesting; stochastic geometry; cooperative wireless networks
TL;DR:
Numerical results show that a small cluster size (typically 3 or smaller) optimizes the network-level performance and the utility of having a large energy buffer increases with the energy harvesting rate as well as with the cluster size in sufficiently dense networks.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
A compressive channel estimation technique robust to synchronization impairments
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2017-July, 1–5.
Contributors: N. Myers * & *
TL;DR:
This paper develops a compressive channel estimation algorithm for narrowband mmWave systems, which is robust to such non idealities as carrier frequency offset and phase noise, and performs better than comparable algorithms that are robust to phase errors.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
A frequency-domain approach to wideband channel estimation in millimeter wave systems
IEEE International Conference on Communications.
Contributors: J. Rodriguez-Fernandez*, K. Venugopal *, N. Gonzalez-Prelcic * & *
TL;DR:
A sparse approach for frequency selective channel estimation for mmWave channels, assuming a hybrid architecture, and shows that the estimation error is small and the computational complexity is kept low.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Accurately Accounting for Random Blockage in Device-to-Device mmWave Networks
2017 IEEE Global Communications Conference, GLOBECOM 2017 - Proceedings, 2018-January, 1–6.
Contributors: E. Hriba*, M. Valenti*, K. Venugopal * & *
TL;DR:
An accurate yet tractable analysis of finite mmWave networks that dispenses with the LOS ball assumption is presented, which is general enough to find applications outside of the present mmWave framework.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Achievable uplink rates for massive MIMO with coarse quantization
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 6488–6492.
Contributors: C. Mollén*, J. Choi *, E. Larsson * & *
TL;DR:
An achievable rate is derived for a massive MIMO system with arbitrary quantization and this rate is used to show that ADCs with as low as 3 bits can be used without significant performance loss at spectral efficiencies around 3.5 bpcu per user.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Analysis of beam sweep channel estimation in MmWave massive MIMO networks
2016 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2016 - Proceedings, 615–619.
TL;DR:
A stochastic geometry framework is proposed to study the performance of beam sweep in the uplink, and an approximate upper bound for the success probability is computed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Analysis of interference mitigation in mmWave communications
IEEE International Conference on Communications.
Contributors: A. Jafari *, J. Park * & *
TL;DR:
Simulation results show that as the density of base stations increases, interference mitigation through partial zero forcing enhances the probability of coverage implying the necessity of interference mitigation in dense mmWave networks.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Analyzing wireless power transfer in millimeter wave networks with human blockages
Proceedings - IEEE Military Communications Conference MILCOM, 2017-October, 115–120.
Contributors: T. Khan * & *
TL;DR:
A feasibility study of using mmWave for wireless power transfer in a large-scale network consisting of power beacons and energy harvesters, which suggests that network densification helps improve the performance, despite an increase in the blockage density.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 conference paper
AoD-adaptive subspace codebook for channel feedback in FDD massive MIMO systems
IEEE International Conference on Communications.
Contributors: W. Shen *, L. Dai *, G. Gui *, Z. Wang, * & F. Adachi *
TL;DR:
This paper proposes an angle-of-departure (AoD) adaptive subspace codebook to reduce the codebook size and feedback overhead, and provides performance analysis of the proposed AoD-adaptive sub space codebook, where it is proved that the required number of feedback bits only scales linearly with the number of resolvable AoDs.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
Auxiliary Beam Pair Enabled AoD and AoA Estimation in Closed-Loop Large-Scale Millimeter-Wave MIMO Systems
IEEE Transactions on Wireless Communications, 16(7), 4770–4785.
author keywords: MIMO; millimeter-wave systems; auxiliary beam pair; AoD/AoA estimation
TL;DR:
Though the design principles are derived assuming a high-power regime, evaluation under more realistic assumption shows that by employing the proposed method, good angle estimation performance is achieved under various signal-to-noise ratio levels and channel conditions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Beam tracking for mobile millimeter wave communication systems
2016 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2016 - Proceedings, 743–747.
Contributors: V. Va *, H. Vikalo * & *
TL;DR:
A beam tracking method requiring to train only one beam pair to track a path in the analog beamforming architecture is developed, considering its low complexity which is suitable for mobile settings, the extended Kalman filter is chosen as the tracking filter.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Blockage and Coverage Analysis with MmWave Cross Street BSS Near Urban Intersections
IEEE International Conference on Communications.
Contributors: Y. Wang *, K. Venugopal *, A. Molisch * & *
TL;DR:
It is shown that in multi-lane V2I networks, blockage among vehicles is not significant and deploying more BSs does not increase coverage probability efficiently in ultra-dense streets.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Can operators simply share millimeter wave spectrum licenses?
2016 Information Theory and Applications Workshop, ITA 2016.
Contributors: A. Gupta *, J. Andrews * & *
TL;DR:
It is shown that shared licenses can use a smaller bandwidth to achieve the same per-user median rate as providers with an exclusive spectrum license, which implies that the optimal amount of spectrum sharing depends on the target rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
Channel Estimation for Hybrid Architecture-Based Wideband Millimeter Wave Systems
IEEE Journal on Selected Areas in Communications, 35(9), 1996–2009.
Contributors: K. Venugopal *, A. Alkhateeb *, N. Gonzalez Prelcic* & *
author keywords: Millimeter wave communications; channel estimation; frequency-selective channel; hybrid precoder-combiner; compressed sensing; sparse recovery; multi-stream; MIMO; IEEE 802.11ad
TL;DR:
This paper develops a sparse formulation and compressed sensing-based solutions for the wideband mmWave channel estimation problem for hybrid architectures and proposes explicit channel estimation techniques for purely time or frequency domains and for combined time/frequency domains.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Channel estimation in mixed hybrid-low resolution MIMO architectures for mmWave communication
Conference Record - Asilomar Conference on Signals, Systems and Computers, 768–773.
Contributors: J. Rodriguez-Fernandez*, N. Gonzalez-Prelcic * & *
TL;DR:
This paper proposes a compressive channel estimator that exploits the sparse structure of the millimeter wave channel to compensate for the loss of information inherent to the proposed architecture.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Compressed beam-selection in millimeterwave systems with out-of-band partial support information
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3499–3503.
Contributors: A. Ali * & *
TL;DR:
This work forms beam-selection as a weighted sparse signal recovery problem, and obtains the weights using sub-6 GHz angular information as out-of-band side information about the mmWave channel as well as formalizes the notion of spatial congruence between sub- 6 GHz and mmWave and numerically evaluates the degree of spatial Congruence.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Cost-effective vehicular radar through minimally-modified IEEE 802.11 devices
2017 IEEE Radar Conference, RadarConf 2017, 0675–0680.
TL;DR:
Simulations show that the proposed solution can deliver acceptable vehicular radar performance with the 10–20 MHz of spectrum provided by IEEE 802.11, demonstrating the feasibility of substantial cost reduction in vehicular Radar.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Delay and Doppler processing for multi-target detection with IEEE 802.11 OFDM signaling
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3414–3418.
Contributors: D. Nguyen * & *
TL;DR:
The feasibility of extending IEEE 802.11p short-range communication in vehicles to automotive radio detection and ranging (radar) functionality is studied and the estimation of signal parameters via rotational invariance technique (ESPRIT) for concurrent multi-target detection and range/velocity estimation is applied.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
Dynamic Subarrays for Hybrid Precoding in Wideband mmWave MIMO Systems
IEEE Transactions on Wireless Communications, 16(5), 2907–2920.
Contributors: S. Park *, A. Alkhateeb * & *
author keywords: Hybrid precoding; millimeter wave systems; MIMO; wideband; subarrays
TL;DR:
A closed-form solution for fully connected OFDM-based hybrid analog/digital precoding is developed for frequency selective mmWave systems and the results indicate that the developed dynamic subarray solution outperforms the fixed hybrid subarray structures in various system and channel conditions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Dynamic bit selection in mixed-ADC cloud-RAN systems
IEEE International Conference on Communications.
TL;DR:
In a C-RAN with limited fronthaul capacity, the proposed mixed-ADC makes more efficient use of the fronstaul capacity and assigning a high resolution ADC to a strong channel is beneficial.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Dynamic subarray architecture for wideband hybrid precoding in millimeter wave massive MIMO systems
2016 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2016 - Proceedings, 600–604.
Contributors: S. Park *, A. Alkhateeb * & *
TL;DR:
A closed-form solution for OFDM-based wideband hybrid precoding is developed for both fully-connected and subarray architectures in frequency selective channels and a novel technique is proposed that dynamically constructs the hybrid subarrays based on the long-term channel characteristics.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Enclosed mmWave Wearable Networks: Feasibility and Performance
IEEE Transactions on Wireless Communications, 16(4), 2300–2313.
Contributors: G. George *, K. Venugopal *, A. Lozano * & *
author keywords: Wearable networks; indoor mmWave communication; stochastic geometry; random shape theory; directional beamforming
TL;DR:
This paper investigates the feasibility of mmWave frequencies for personal networks of wireless wearable devices in enclosed settings and assess the interplay of surface reflections and blockages for dense deployments of wearable networks equipped with directional antenna arrays in relevant indoor settings.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Energy Efficiency of Wireless Information and Power Transfer with Massive MIMO
IEEE Vehicular Technology Conference, 2017-June.
Contributors: T. Khan *, A. Yazdan*, Y. Maguire* & *
TL;DR:
The overall energy efficiency of a wirelessly powered massive MIMO system is investigated where a multi-antenna base-station uses wireless energy transfer to charge single- antenna energy harvesting users on the downlink.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Energy-efficient massive MIMO
IEEE Microwave Magazine, 18(5), 18–30.
TL;DR:
Deployment of connectivity solutions in rural communities, however, faces many practical challenges, and wireless connectivity solutions for such applications must focus on low-power hardware operations and high energy efficiency (EE).
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Enhancing Secrecy with Multiantenna Transmission in Millimeter Wave Vehicular Communication Systems
IEEE Transactions on Vehicular Technology, 66(9), 8139–8151.
Contributors: M. Eltayeb*, J. Choi *, T. Al-Naffouri * & *
author keywords: Beamforming; millimeter wave (mmWave); privacy; vehicular communication
TL;DR:
Two physical layer (PHY) security techniques for vehicular mmWave communication systems are proposed that provide higher secrecy rate when compared to traditional PHY security techniques that require digital or more complex antenna architectures.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Estimating millimeter wave channels using out-of-band measurements
2016 Information Theory and Applications Workshop, ITA 2016.
Contributors: A. Ali *, N. González-Prelcic * & *
TL;DR:
A transform is provided that can be used to relate the spatial correlation matrix derived at one frequency to another much different frequency, and an expression for the excess mean squared error is derived to evaluate the performance experienced by using the transformed correlation in mmWave channel estimation.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
Experimental evaluation in wireless communications
Eurasip Journal on Wireless Communications and Networking, 2017(1).
Contributors: J. García-Naya *, * , F. Kaltenberger *, M. Rupp * & J. Vía*
Source: ORCID
Added: September 11, 2020
2017 conference paper
Exploiting Common Sparsity for Frequency-Domain Wideband Channel Estimation at mmWave
2017 IEEE Global Communications Conference, GLOBECOM 2017 - Proceedings, 2018-January, 1–6.
Contributors: J. Rodriguez-Fernandez*, N. Gonzalez-Prelcic *, K. Venugopal * & *
TL;DR:
This paper designs a frequency-domain algorithm that leverages the sparsity in the channel to estimate the frequency-selective mmWave channel, and concludes that the proposed approach outperforms previous algorithms, providing a better performance at a lower computational cost.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Exploiting antenna motion for faster initialization of centimeter-accurate gnss positioning with low-cost antennas
IEEE Transactions on Aerospace and Electronic Systems, 53(4), 1597–1613.
Contributors: K. Pesyna*, T. Humphreys *, * , T. Novlan* & J. Zhang*
TL;DR:
It is demonstrated that TAR can be significantly reduced through antenna motion, particularly gentle wavelength-scale random antenna motion that acts to decrease the correlation time of the multipath-induced phase errors.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
Exploiting spatial channel covariance for hybrid precoding in massive MIMO systems
IEEE Transactions on Signal Processing, 65(14), 3818–3832.
author keywords: Hybrid precoding; multi-user MIMO; massive MIMO; covariance matrix; cellular communication; antenna arrays
TL;DR:
This work applies a regularized zero-forcing precoder for the baseband precoding matrix to find an unconstrained analog precoder that maximizes signal-to-leakage-plus-noise ratio (SLNR) while ignoring analog phase shifter constraints.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
FER Estimation in a Memoryless BSC with Variable Frame Length and Unreliable ACK/NAK Feedback
IEEE Transactions on Wireless Communications, 16(6), 3661–3673.
Contributors: A. Rico-Alvarino*, R. Lopez-Valcarce *, C. Mosquera * & *
author keywords: FER estimation; maximum likelihood; unreliable feedback; link adaptation; expectation-maximization
TL;DR:
Although the main focus is on maximum likelihood (ML) estimation, there are also low-complexity schemes performing close to optimal in some scenarios and estimators developed that incorporate the impairment of unreliable observations by considering noisy ACK/NAK feedback links.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Framework for an Innovative Perceptive Mobile Network Using Joint Communication and Sensing
IEEE Vehicular Technology Conference, 2017-June.
Contributors: J. Zhang *, A. Cantoni*, X. Huang *, Y. Guo * & *
TL;DR:
An innovative perceptive mobile (i.e. cellular) network that integrates sensing with communication, and supports new applications widely in transportation, surveillance and environmental sensing is developed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Frequency selective multiuser hybrid precoding for mmWave systems with imperfect channel knowledge
Conference Record - Asilomar Conference on Signals, Systems and Computers, 291–295.
Contributors: J. González-Coma *, N. González-Prelcic *, L. Castedo * & *
TL;DR:
In this work, the precoders/combiners for a multiuser mmWave system considering a frequency selective channel model are designed via an iterative MMSE algorithm, which obtains a close performance to the all-digital solution in terms of achievable rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
Hybrid Architectures with Few-Bit ADC Receivers: Achievable Rates and Energy-Rate Tradeoffs
IEEE Transactions on Wireless Communications, 16(4), 2274–2287.
Contributors: J. Mo *, A. Alkhateeb *, S. Abu-Surra* & *
author keywords: Massive MIMO; millimeter wave communication; analog-to-digital converters; hybrid analog/digital architecture
TL;DR:
A generalized hybrid architecture with a small number of RF chains and a finite number of ADC bits is proposed, and numerical simulations show that coarse ADC quantization is optimal under various system configurations.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Hybrid MMSE Precoding and Combining Designs for mmWave Multiuser Systems
IEEE Access, 5, 19167–19181.
Contributors: D. Nguyen *, L. Le*, T. Le-Ngoc * & *
author keywords: Millimeter wave; multiple-input multiple-output (MIMO); antenna arrays; beamforming; precoding; sparse reconstruction; minimum mean squared-error (MMSE)
TL;DR:
Simulation results show the performance advantages of the proposed precoding/combining designs for mmWave multiuser systems, based on the mean-squared error (MSE) criteria.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Hybrid precoding using long-term channel statistics for massive MIMO systems
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3449–3453.
TL;DR:
A hybrid technique that uses only long-term channel statistics in computing the analog precoding matrix and is designed to maximize signal-to-leakage-plus-noise ratio (SLNR) when combined with a baseband precoder.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Initial Beam Association in Millimeter Wave Cellular Systems: Analysis and Design Insights
IEEE Transactions on Wireless Communications, 16(5), 2807–2821.
Contributors: A. Alkhateeb *, Y. Nam *, M. Rahman *, J. Zhang * & *
author keywords: Millimeter wave cellular systems; initial access; beam association; stochastic geometry
TL;DR:
The results show that unless the employed beams are very wide, initial beam training with full pilot reuse is nearly as good as perfect beam alignment.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Joint Communications and Sensing Using Two Steerable Analog Antenna Arrays
IEEE Vehicular Technology Conference, 2017-June.
Contributors: J. Zhang *, A. Cantoni*, X. Huang *, Y. Guo * & *
TL;DR:
This paper proposes a low-cost system framework which allows seamless operation of communications and sensing, using two small- size steerable analog antenna arrays, and provides system architecture, high-level protocols, detailed signal model, novel beamforming design and advanced 1D compressive sensing algorithms for joint communication and sensing.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Limited feedback in MISO systems with finite-bit ADCs
Conference Record - Asilomar Conference on Signals, Systems and Computers, 479–483.
Contributors: J. Mo * & *
TL;DR:
The results show that the number of bits per feedback should increase linearly with the ADC resolution to restrict the loss and derive achievable rates with finite-bit ADCs and finite- bit CSI feedback.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
Measurements of the 60 GHz UE to eNB Channel for Small Cell Deployments
IEEE Wireless Communications Letters, 6(2), 178–181.
Contributors: S. Yoo *, S. Cotton *, * & Y. Chun *
author keywords: Evolved NodeB; mm-wave band; path loss; shadowed fading; small-scale fading; user equipment
TL;DR:
The results of a series of experiments performed to examine the impact of terminal handling and movement upon the user equipment (UE) to evolved NodeB (eNB) communications channel at 60 GHz show that the mode of UE operation will be important for future 60 GHz cellular applications.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
Millimeter-Wave Communication with Out-of-Band Information
IEEE Communications Magazine, 55(12), 140–146.
Contributors: N. González-Prelcic *, A. Ali *, V. Va * & *
TL;DR:
This article analyze different strategies to leverage information derived from sensors or from other communication systems operating at sub-6 GHz bands to help configure the mmWave communication link and describes the overhead reductions that can be obtained when exploiting out-of-band information.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
Modeling and Analyzing Millimeter Wave Cellular Systems
IEEE Transactions on Communications, 65(1), 403–430.
Contributors: J. Andrews *, T. Bai*, M. Kulkarni*, A. Alkhateeb *, A. Gupta * & *
author keywords: 5G; cellular systems; millimeter wave communications; stochastic geometry
TL;DR:
A baseline analytical approach based on stochastic geometry that allows the computation of the statistical distributions of the downlink signal-to-interference-plus-noise ratio (SINR) and also the per link data rate, which depends on the SINR as well as the average load is presented.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
Multi-Layer Precoding: A Potential Solution for Full-Dimensional Massive MIMO Systems
IEEE Transactions on Wireless Communications, 16(9), 5810–5824.
Contributors: A. Alkhateeb *, G. Leus * & *
author keywords: Multi-layer precoding; massive MIMO; full-dimensional MIMO; pilot decontamination
TL;DR:
A specific multi-layer precoding design that leverages the directional characteristics of large-scale MIMO channels to manage inter-cell interference with low channel knowledge requirements and allows for an efficient implementation using hybrid analog/digital architectures is presented.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
Optimal User Loading in Massive MIMO Systems with Regularized Zero Forcing Precoding
IEEE Wireless Communications Letters, 6(1), 118–121.
author keywords: Massive MIMO; regularized zero-forcing; SLNR; user loading
TL;DR:
Focusing on spatially uncorrelated channels with homogeneous large scale fading gains, it is shown that the SLNR is asymptotically equal to signal-to-interference-plus-noise ratio, which allows us to optimize the user loading for spectral efficiency.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Optimality of Frequency Flat Precoding in Frequency Selective Millimeter Wave Channels
IEEE Wireless Communications Letters, 6(3), 330–333.
Contributors: K. Venugopal *, N. Gonzalez-Prelcic * & *
author keywords: Millimeter wave communications; hybrid architecture; subspace estimation
TL;DR:
It is shown that under some assumptions, the dominant subspaces of the frequency domain channel matrices are equivalent, which means that semi-unitary frequency flat precoding and combining are sufficient to achieve the maximum spectral efficiency when there is not too much scattering in the channel.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Optimization Of Mixed-ADC multi-antenna systems for cloud-RAN deployments
IEEE Transactions on Communications, 65(9), 3962–3975.
author keywords: Analog-to-digital converter; green communications; energy efficiency; generalized mutual information; cloud-RAN; multiple-antenna systems; mixed-ADC architecture
TL;DR:
In the proposed algorithms, it is shown that for spectral efficiency, using high-resolution ADC on the strong channels is beneficial and the results for energy efficiency maximization are similar, though the largest resolutions are reduced to save power.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Performance trade-off in an adaptive IEEE 802.11AD waveform design for a joint automotive radar and communication system
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 4281–4285.
Contributors: P. Kumari *, D. Nguyen * & *
TL;DR:
An adaptive preamble design is proposed that permits a trade-off between radar parameters' estimation accuracy and communication rate and a minimum mean square error (MMSE) metric based on rate distortion theory is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Radar aided beam alignment in MmWave V2I communications supporting antenna diversity
2016 Information Theory and Applications Workshop, ITA 2016.
Contributors: N. González-Prelcic *, R. Méndez-Rial * & *
TL;DR:
This paper proposes a set of algorithms to perform the beam alignment task in a vehicle-to-infrastructure (V2I) scenario, from extracting information from the radar signal to configuring the beams that illuminate the different antennas in the vehicle.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Secure Communications in Millimeter Wave Ad Hoc Networks
IEEE Transactions on Wireless Communications, 16(5), 3205–3217.
author keywords: Ad hoc; millimeter wave; beamforming; uniform linear array; average achievable secrecy rate
TL;DR:
The results reveal that in the low transmit power regime, the use of low mmWave frequency achieves better secrecy performance, and when increasing transmit power, a transition from low mm Wave frequency to high mmWave Frequency is demanded for obtaining a higher secrecy rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 article
Security in automotive radar and vehicular networks
Microwave Journal, Vol. 60, pp. 148–164. http://www.scopus.com/inward/record.url?eid=2-s2.0-85021274268&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2017 conference paper
Spatial channel covariance estimation for mmWave hybrid MIMO architecture
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1424–1428.
Contributors: S. Park * & *
TL;DR:
Two key ideas for developing the covariance estimation techniques based on compressive sensing techniques are proposed, one is to use the Hermitian property of the covariances matrix, and the other is toUse a time-varying analog combining matrix to effectively extend the measurement size.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 journal article
The Impact of Beamwidth on Temporal Channel Variation in Vehicular Channels and Its Implications
IEEE Transactions on Vehicular Technology, 66(6), 5014–5029.
author keywords: Beam alignment; beamforming; channel coherence time; Doppler spread; millimeter wave (mmWave); vehicular communication
TL;DR:
In this paper, closed-form expressions relating the channel coherence time and beamwidth are derived and the pointing error due to the receiver motion is incorporated to show that there exists a nonzero optimal beamwidth that maximizes the coherenceTime.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2017 conference paper
Time-domain channel estimation for wideband millimeter wave systems with hybrid architecture
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 6493–6497.
Contributors: K. Venugopal *, A. Alkhateeb *, * & N. Prelcic *
TL;DR:
A sparse recovery based time-domain channel estimation technique for hybrid architecture based frequency selective mmWave systems and the proposed compressed sensing channel estimation algorithm is shown to provide good estimation error performance, while requiring small training overhead.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Two-dimensional AoD and AoA acquisition for wideband millimeter-wave systems with dual-polarized MIMO
IEEE Transactions on Wireless Communications, 16(12), 7890–7905.
author keywords: MIMO; millimeter-wave systems; auxiliary beam pair; two-dimensional AoD/AoA estimation; dual-polarization
Source: ORCID
Added: September 11, 2020
2017 journal article
Uplink Performance of Wideband Massive MIMO with One-Bit ADCs
IEEE Transactions on Wireless Communications, 16(1), 87–100.
Contributors: C. Mollen*, J. Choi *, E. Larsson * & *
author keywords: Channel estimation; equalization; OFDM; one-bit ADCs; wideband massive MIMO
TL;DR:
An analysis of the spectral efficiency of single-carrier and orthogonal-frequency-division-multiplexing (OFDM) transmission in massive MIMO systems that use one-bit ADCs is presented and it is concluded that wideband massive M IMO systems work well with one- bit ADCs.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Where, when, and how mmwave is used in 5G and beyond
IEICE Transactions on Electronics, E100.C(10), 790–808.
Contributors: K. Sakaguchi *, T. Haustein*, S. Barbarossa *, E. Strinati *, A. Clemente *, G. Destino*, A. Pärssinen *, I. Kim
author keywords: millimeter wave; MEC; 28GHz; 60GHz; mesh network; V2V/V2X; automated driving; future forecast
TL;DR:
This paper gives four 5G mmWave deployment examples and describes in chronological order the scenarios and use cases of their probable deployment, including expected system architectures and hardware prototypes.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Wireless Power Transfer in Millimeter Wave Tactical Networks
IEEE Signal Processing Letters, 24(9), 1284–1287.
Contributors: T. Khan * & *
TL;DR:
A feasibility study of using mmWave for wireless power transfer in a large-scale network consisting of power beacons and energy harvesters is presented, suggesting that network densification helps improve the performance, despite an increase in the blockage density.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Wireless Powered Dense Cellular Networks: How Many Small Cells Do We Need?
IEEE Journal on Selected Areas in Communications, 35(9), 2010–2024.
author keywords: Millimeter wave (mmWave); dense small cells; wireless power transfer; throughput
TL;DR:
The results reveal that the amount of harvested energy from the mmWave tier can be comparable to the sub-6-GHz counterpart in the dense scenarios, and for the same tier scale, mmWavetier can achieve higher throughput.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2017 journal article
Wirelessly powered communication networks with short packets
IEEE Transactions on Communications, 65(12), 5529–5543.
Contributors: T. Khan *, * & P. Popovski *
author keywords: Energy harvesting; wireless information and power transfer; energy supply probability; wireless power transfer; power control; finite-length information theory; non-asymptotic achievable rate; stochastic geometry
TL;DR:
A wireless-powered communication system is investigated, where an energy harvesting transmitter, charged by power beacons via wireless energy transfer, attempts to communicate with a receiver over a noisy channel, revealing that power control is essential for improving the achievable rate of the considered system.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
A lower bound on the optimum feedback rate for downlink multi-antenna cellular networks
IEEE International Symposium on Information Theory - Proceedings, 2016-August, 1601–1605.
Contributors: J. Park *, J. Andrews *, * & N. Lee *
TL;DR:
A tight lower bound on the optimum number of feedback bits maximizing the net spectral efficiency is derived, whereby the cost of feedback sent via uplink is subtracted from the corresponding gain in downlink spectral efficiency.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Adaptive Multicell 3-D Beamforming in Multiantenna Cellular Networks
IEEE Transactions on Vehicular Technology, 65(8), 6217–6231.
Contributors: N. Seifi*, * , M. Coldrey * & T. Svensson *
author keywords: Antenna tilt; interference management; multicell cooperation; 3-D beamforming
TL;DR:
A novel hybrid multicell cooperation technique is proposed in which the intercell interference is controlled via either cooperative beamforming in the horizontal plane or coordinated beamform in the vertical plane of the wireless channel, which is denoted as adaptiveMulticell 3-D beamforming.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Adaptive feedback partitions in dynamic zero-forcing beamforming based on stochastic geometry
2016 IEEE Globecom Workshops, GC Wkshps 2016 - Proceedings.
Contributors: J. Park * & *
TL;DR:
This paper analyzes the performance of dynamic zero-forcing beamforming with limited feedback and proposes adaptive feedback partition strategies, each of which is applied for known intra-cluster geometry and unknown intra- cluster geometry, respectively.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Advanced interference management technique: Potentials and limitations
IEEE Wireless Communications, 23(3), 30–38.
Contributors: N. Lee * & *
TL;DR:
This article provides a high-level overview of several different interference shaping and exploitation techniques for single-hop, multihop, and multi-way network architectures with graphical illustrations.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
An Overview of Signal Processing Techniques for Millimeter Wave MIMO Systems
IEEE Journal on Selected Topics in Signal Processing, 10(3), 436–453.
Contributors: * , N. Gonzalez-Prelcic *, S. Rangan *, W. Roh* & A. Sayeed *
TL;DR:
This article provides an overview of signal processing challenges in mmWave wireless systems, with an emphasis on those faced by using MIMO communication at higher carrier frequencies.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Analysis of Urban Two-Tier Heterogeneous Mobile Networks With Small Cell Partitioning
IEEE Transactions on Wireless Communications, 15(10), 7044–7057.
Contributors: M. Taranetz*, * & M. Rupp *
author keywords: Small cells; heterogeneous mobile network; urban topology; building density; Boolean model; stochastic geometry; virtual building approximation
TL;DR:
This paper investigates the performance of typical indoor users in urban two-tier heterogeneous mobile networks with indoor-deployed small cell base stations (BSs) and outdoor BSs and finds that the indoor area coverage significantly affects the impact of the target building's wall penetration loss.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Analysis of millimeter wave networked wearables in crowded environments
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2016-February, 872–876.
Contributors: K. Venugopal *, M. Valenti* & *
TL;DR:
The effect of human body blockage on the mmWave signals and the role of network density are investigated to show that an increase in interferer density reduces the mean number of significant interferers.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Analysis of urban millimeter wave microcellular networks
IEEE Vehicular Technology Conference, 0.
Contributors: Y. Wang *, K. Venugopal *, A. Molisch * & *
TL;DR:
This work analyzed network performance by modeling the urban microcell network by a Manhattan Poisson line process and obtained the coverage probability and reveal the impacts of interference from the LOS and NLOS BSs.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Analytical characterization of ITLinQ: Channel allocation for device-to-device communication networks
IEEE Transactions on Wireless Communications, 15(5), 3603–3615.
Contributors: R. Mungara*, X. Zhang *, A. Lozano * & *
author keywords: ITLinQ; FlashLinQ; channelization; channel allocation; stochastic geometry; Poisson point process; spectral efficiency
TL;DR:
An analytical characterization of ITLinQ is presented, one of the principal D2D channelization schemes proposed to date, and a stochastic geometry setting is utilized for this analysis, enabling gleaning insights on how IT LinQ avoids situations of excessive interference.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Analyzing Uplink SINR and Rate in Massive MIMO Systems Using Stochastic Geometry
IEEE Transactions on Communications, 64(11), 4592–4606.
author keywords: Massive MIMO; SINR; achievable rate; performance evaluation; stochastic geometry
TL;DR:
It is shown that, using massive MIMO, the uplink SINR in certain urban marcocell scenarios is limited by interference, and the optimal compensation fraction in fractional power control to optimize rate is generally different for MRC and ZF receivers.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Array thinning for antenna selection in millimeter wave MIMO systems
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2016-May, 3416–3420.
Contributors: C. Rusu *, N. Gonzalez-Prelcic * & *
TL;DR:
A new optimization solution based on compressed sensing techniques and convex optimization relaxation which is shown to be a heuristic that solves the original binary optimization problem of side lobe level minimization in millimeter wave MIMO systems is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Auxiliary beam pair design in mmWave cellular systems with hybrid precoding and limited feedback
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2016-May, 3391–3395.
TL;DR:
It is shown via simulations that auxiliary beam pairs have lower complexity and better achievable rates with a moderate amount of feedback, compared to conventional beam training methods.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Auxiliary beam pair enabled AoD and AoA estimation in mmWave FD-MIMO systems
2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings.
TL;DR:
It is shown via simulation results that by employing the proposed method, promising elevation/azimuth AoD and AoA estimation performance can be achieved under various signal- to-noise ratio levels and channel conditions.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Basic relationship between channel coherence time and beamwidth in Vehicular Channels
2015 IEEE 82nd Vehicular Technology Conference, VTC Fall 2015 - Proceedings.
Contributors: V. Va * & *
TL;DR:
Close form approximate expressions relating the coherence time and beamwidth are derived taking directional communication into account and it can be shown that the optimal beamwidth is non-zero in contrast to models that assume perfect beam pointing.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Beam design for beam switching based millimeter wave vehicle-to-infrastructure communications
2016 IEEE International Conference on Communications, ICC 2016.
Contributors: V. Va *, T. Shimizu *, G. Bansal* & *
TL;DR:
An optimization of beam design in terms of rate is presented using a gradient descent method for an optimal beam design to maximize the data rate for non-overlap beams and shows close performance to the equal coverage beam design.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Beam switching for millimeter wave communication to support high speed trains
2015 IEEE 82nd Vehicular Technology Conference, VTC Fall 2015 - Proceedings.
Contributors: V. Va *, X. Zhang * & *
TL;DR:
Using the IEEE 802.11ad system parameters, a beam switching approach is considered that leverages the position information from the train control system for efficient beam alignment and shows that a properly optimized system can achieve multi-Gbps throughput.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Capacity and coverage in clustered LOS mmWave Ad Hoc networks
2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings.
TL;DR:
This paper develops analytic expressions for the capacity of clustered mmWave ad hoc networks under two channel access assumptions: uncoordinated channel access (UCA) and TDMA and shows that with directional antenna arrays UCA can outperform TDMA in terms of per cluster capacity if the cluster density is not too large.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Capacity and scaling laws of dense mmWave and interference alignment ad hoc networks
Proceedings - IEEE Military Communications Conference MILCOM, 319–324.
TL;DR:
The results indicate that the number of antennas with uncoordinated beamforming must scale sub-linearly with the user density while the numberof users coordinating with IA must scale super-linsearly.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Compressed channel feedback for correlated massive MIMO
Journal of Communications and Networks, 18(1), 95–104.
author keywords: MIMO system; multi-user system; channel feedback; compressed feedback
TL;DR:
A new sparsifying basis is proposed that reflects the long-term characteristics of the channel, and needs no change as long as the spatial correlation model does not change, and a new reconstruction algorithm for CS is proposed, and dimensionality reduction as a compression method is suggested.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Compressive channel estimation in FDD multi-cell massive MIMO systems with arbitrary arrays
2016 IEEE Globecom Workshops, GC Wkshps 2016 - Proceedings.
Contributors: N. Gonzalez-Prelcic *, K. Truongt, C. Rusu * & *
TL;DR:
This paper proposes a general approach for downlink channel estimation in FDD massive MIMO systems which leverages the individual sparsity in the different downlink channels without any other additional assumption.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Compressive sensing for blockage detection in vehicular millimeter wave antenna arrays
2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings.
Contributors: M. Eltayeb*, T. Al-Naffouri * & *
TL;DR:
A blockage detection technique for millimeter wave vehicular antenna arrays that jointly estimates the locations of the blocked antennas and the attenuation and phase-shifts that result from the suspended particles is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Cooperative base station coloring for pair-wise multi-cell coordination
IEEE Transactions on Communications, 64(1), 402–415.
author keywords: Base station coloring; multi-cell coordination; semi-static clustering
TL;DR:
The main advantage of the proposed coordination method is that the BS selection conflict problem is prevented, while users are guaranteed to communicate with their two closest BSs in any irregular BS topology.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Device-to-Device Millimeter Wave Communications: Interference, Coverage, Rate, and Finite Topologies
IEEE Transactions on Wireless Communications, 15(9), 6175–6188.
Contributors: K. Venugopal *, M. Valenti* & *
author keywords: Wearables; millimeter wave communications; finite wireless networks; device-to-device communication; directive antenna array; beamforming
TL;DR:
Stochastic geometry is used to analyze the performance of mmWave networks with a finite number of interferers in a finite network region and concludes that mmWave frequencies can provide gigabits per second throughput even with omni-directional transceiver antennas, and larger, more directive antenna arrays give better system performance.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Energy-Efficient Hybrid Analog and Digital Precoding for MmWave MIMO Systems with Large Antenna Arrays
IEEE Journal on Selected Areas in Communications, 34(4), 998–1009.
Contributors: X. Gao *, L. Dai *, S. Han *, I. Chih-Lin * & *
author keywords: MIMO; mmWave communications; hybrid precoding; energy-efficient; 5G
TL;DR:
This paper proposes a successive interference cancelation (SIC)-based hybrid precoding with near-optimal performance and low complexity, and proposes a low-complexity algorithm to realize SIC-based Hybrid precoding, which can avoid the need for the singular value decomposition and matrix inversion.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
FDD massive MIMO with analog csi feedback
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2016-February, 322–327.
Contributors: K. Truong *, H. Nikopour* & *
TL;DR:
This paper considers an FDD massive MIMO network where the base stations obtain downlink channel estimates via analog feedback from the users and derives closed-form expressions of the downlink achievable signal-to-interference-plus-noise ratio (SINR) and the corresponding rates.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Fast Orthonormal Sparsifying Transforms Based on Householder Reflectors
IEEE Transactions on Signal Processing, 64(24), 6589–6599.
Contributors: C. Rusu *, N. Gonzalez-Prelcic * & *
author keywords: Sparsifying transforms; fast transforms; dictionary learning; compressed sensing
TL;DR:
A framework for learning orthonormal dictionaries, which are built from products of a few Householder reflectors, and two algorithms are proposed to learn the reflector coefficients, which have low computational complexity and are shown to converge to local minimum points.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
4. Quality Education
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Frequency Selective Hybrid Precoding for Limited Feedback Millimeter Wave Systems
IEEE Transactions on Communications, 64(5), 1801–1818.
Contributors: A. Alkhateeb * & *
author keywords: Frequency selective; hybrid analog/digital precoding; millimeter wave communications; spatial-multiplexing codebooks
TL;DR:
A low-complexity yet near-optimal greedy frequency selective hybrid precoding algorithm is proposed based on Gram-Schmidt orthogonalization and efficient hybrid analog/digital codebooks are developed for spatial multiplexing in wideband mmWave systems.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Gains of Restricted Secondary Licensing in Millimeter Wave Cellular Systems
IEEE Journal on Selected Areas in Communications, 34(11), 2935–2950.
Contributors: A. Gupta *, A. Alkhateeb *, J. Andrews * & *
author keywords: Millimeter wave cellular systems; spectrum sharing; secondary licensing
TL;DR:
This paper model a mmWave cellular system, where an operator that primarily owns an exclusive-use license of a certain band can sell a restricted secondary license of the same band to another operator that has a restriction on the maximum interference it can cause to the original network.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Gram Schmidt based greedy hybrid precoding for frequency selective millimeter wave MIMO systems
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2016-May, 3396–3400.
Contributors: A. Alkhateeb * & *
TL;DR:
A low-complexity yet near-optimal greedy algorithm is developed for the design of the hybrid analog/digital precoders and results show that the developed precoding design algorithm achieves very good performance compared with the unconstrained solutions while requiring less complexity.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Hybrid MIMO Architectures for Millimeter Wave Communications: Phase Shifters or Switches?
IEEE Access, 4, 247–267.
Contributors: R. Mendez-Rial*, C. Rusu *, N. Gonzalez-Prelcic *, A. Alkhateeb * & *
author keywords: Millimeter wave; hybrid architecture; switches; channel estimation; precoding
TL;DR:
Numerical results show that architectures based on switches obtain equal or better channel estimation performance to that obtained using phase shifters, while reducing hardware complexity and power consumption, and all the hybrid architectures provide similar spectral efficiencies.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Hybrid precoders and combiners for mmwave MIMO systems with per-antenna power constraints
2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings.
Contributors: R. Lopez-Valcarce *, N. Gonzalez-Prelcic *, C. Rusu * & *
TL;DR:
A new method is developed for the design of the hybrid precoder and combiner which attempts to match such all- digital approximation, and results show the effectiveness of the proposed approach, which performs close to the all-digital solution.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Introduction to the Special Issue on Signal Processing for Millimeter Wave Wireless Communications
IEEE Journal on Selected Topics in Signal Processing, 10(3), 433–435.
Contributors: * , N. Gonzalez-Prelcic *, S. Rangan *, W. Roh* & A. Sayeed *
TL;DR:
The eleven papers in this special section focus signal processing for millimeter wave (mmWave) wireless communications, which is defining a new era of wireless communication by offering much higher bandwidth communication channels than presently used in commercial wireless systems.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Investigating the IEEE 802.11ad standard for millimeter wave automotive radar
2015 IEEE 82nd Vehicular Technology Conference, VTC Fall 2015 - Proceedings.
Contributors: P. Kumari *, N. González-Prelcic * & *
TL;DR:
This paper develops a joint framework of long range automotive radar (LRR) and vehicle-to-vehicle communication (V2V) at 60 GHz by exploiting the special data-aided structure (repeated Golay complimentary sequences) of an IEEE 802.11ad single carrier physical layer (SCPHY) frame.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
LTE-Advanced Pro: Part 3 [Guest Editorial]
IEEE Communications Magazine, 54(7), 52–53.
TL;DR:
Not only will the mobile network be significantly faster, but even more applications will become possible and a mobile cloud will allow access to the authors' data anytime, anywhere.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
LTE-advanced pro: Part 1
IEEE Communications Magazine, 54(5), 74–75.
TL;DR:
Long Term Evolution (LTE) has become the most successful mobile wireless broadband technology, serving over one billion users as of the beginning of 2016, but there is still significant room for LTE to grow as a mobile technology.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
LTE-advanced pro: Part 2 [Guest Editorial]
IEEE Communications Magazine, 54(6), 12–13.
TL;DR:
This part of the Feature Topic will focus on technologies for Long Term Evolution (LTE) that will enhance the support of IoT.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Limited feedback in multiple-antenna systems with one-bit quantization
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2016-February, 1432–1436.
Contributors: J. Mo * & *
TL;DR:
A new codebook design for the beamforming case is proposed that separately quantizes the channel direction and the residual phase for limited feedback systems with one-bit ADCs.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Location based performance model for indoor mmWave wearable communication
2016 IEEE International Conference on Communications, ICC 2016.
Contributors: K. Venugopal * & *
TL;DR:
A novel system model is proposed for analyzing system performance of mmWave based communication among wearables and the effect of human body blockages is modeled and the system performance is shown to hugely vary depending on the user location, body orientation and the density of the network.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Low Complexity Antenna Selection for Low Target Rate Users in Dense Cloud Radio Access Networks
IEEE Transactions on Wireless Communications, 15(9), 6022–6032.
Contributors: J. Park * & *
author keywords: Antenna selection; cloud RAN; stochastic geometry
TL;DR:
A distinguishable feature of the proposed algorithm is that the algorithm complexity keeps constant independent to the RRH density, so that a user is able to connect to a network without heavy computation at baseband units.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Low Complexity Hybrid Precoding Strategies for Millimeter Wave Communication Systems
IEEE Transactions on Wireless Communications, 15(12), 8380–8393.
Contributors: C. Rusu *, R. Mendez-Rial*, N. Gonzalez-Prelcic * & *
author keywords: Millimeter wave communication; antenna arrays; precoding
TL;DR:
This paper introduces and analyzes several algorithms that efficiently design hybrid precoders and combiners starting from the known optimum digital precoder/combiner, which can be computed when perfect channel state information is available.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Low resolution adaptive compressed sensing for mmWave MIMO receivers
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2016-February, 1138–1143.
Contributors: C. Rusu *, N. Gonzalez-Prelcic * & *
TL;DR:
An adaptive compressed sensing strategy to recover the sparse mmWave channel is designed and the simulation results show that the new adaptive strategy outperforms conventional compressed sensing schemes based on fixed measurement matrices, while requiring a lower number of training pilots.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Massive MIMO Combining with Switches
IEEE Wireless Communications Letters, 5(3), 232–235.
Contributors: A. Alkhateeb *, Y. Nam *, J. Zhang * & *
author keywords: Massive MIMO; switches-based hybrid combining; quasi-coherent combining
TL;DR:
A novel architecture for massive MIMO receivers, consisting of arrays of switches and constant (non-tunable) phase shifters, is proposed, which applies a quasi-coherent combining in the RF domain to reduce the number of required RF chains.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Millimeter Wave Energy Harvesting
IEEE Transactions on Wireless Communications, 15(9), 6048–6062.
Contributors: T. Khan *, A. Alkhateeb * & *
author keywords: Millimeter wave; energy harvesting; wireless power transfer; simultaneous wireless information and energy transfer; stochastic geometry; energy coverage
TL;DR:
Simulation results suggest that mmWave energy harvesting generally outperforms lower frequency solutions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Millimeter Wave Networked Wearables in Dense Indoor Environments
IEEE Access, 4, 1205–1221.
Contributors: K. Venugopal * & *
author keywords: Millimeter wave communication; personal communication networks; indoor communication; internet of things; wearable computers; virtual reality; signal to noise ratio; analytic models; performance analysis
TL;DR:
It is shown that using directional antennas, positioning the transceiver devices appropriately, and orienting the human user body in certain directions depending on the user location result in gigabits-per-second achievable ergodic rates for mmWave wearable networks.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Millimeter Wave: The Future of Commercial Wireless Systems
Technical Digest - IEEE Compound Semiconductor Integrated Circuit Symposium, CSIC, 2016-November.
TL;DR:
This paper, which accompanies a keynote talk with the same name, provides a roadmap to the author's research results in the evolving area of mmWave for consumers.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Millimeter wave vehicular communications: A survey
Foundations and Trends in Networking, 10(1), 1–116.
Contributors: V. Va *, T. Shimizu, G. Bansal & *
TL;DR:
An overview of mmWave vehicular communication with an emphasis on results on channel measurements, the physical PHY layer, and the medium access control MAC layer is provided, with special attention paid to identifying important topics of future research.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Millimeter-Wave Vehicular Communication to Support Massive Automotive Sensing
IEEE Communications Magazine, 54(12), 160–167.
Contributors: J. Choi *, V. Va *, N. González-Prelcic *, R. Daniels, C. Bhat * & *
TL;DR:
The case is made that mmWave communication is the only viable approach for high bandwidth connected vehicles and the overhead of mmWave beam training is proposed, showing that the beam alignment overhead can be reduced by using position information obtained from DSRC.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Millimeter-wave gigabit broadband evolution toward 5G: Fixed access and backhaul
IEEE Communications Magazine, 54(4), 138–144.
Contributors: Z. Pi, J. Choi * & *
TL;DR:
This article explains the MGB concept and describes potential array architectures for realizing the system and demonstrates that with 500 MHz of bandwidth and 28 dBm transmission power, it is possible to provide more than 11 Gb/s backhaul capacity for 96 small cells within a 1 km radius.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Multiple-Antenna Transmission with Limited Feedback in Device-to-Device Networks
IEEE Wireless Communications Letters, 5(2), 200–203.
Contributors: J. Park * & *
author keywords: Device-to-device communication; multiple antenna transmission; limited feedback
TL;DR:
The main finding is that the optimum number of feedback bits scales linearly with the number of transmit antennas and logarithmically with the channel coherence time and the inverse of the node density.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Near Maximum-Likelihood Detector and Channel Estimator for Uplink Multiuser Massive MIMO Systems with One-Bit ADCs
IEEE Transactions on Communications, 64(5), 2005–2018.
author keywords: Channel estimators; detectors; massive MIMO systems; one-bit analog-to-digital converters (ADCs)
TL;DR:
A near maximum likelihood detector for uplink multiuser massive MIMO systems is proposed where each antenna is connected to a pair of one-bit ADCs, i.e., one for each real and imaginary component of the baseband signal.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
On the Feasibility of Sharing Spectrum Licenses in mmWave Cellular Systems
IEEE Transactions on Communications, 64(9), 3981–3995.
Contributors: A. Gupta *, J. Andrews * & *
author keywords: Millimeter wave communication; spectrum sharing; Stochastic geometry
TL;DR:
The theoretical feasibility of spectrum license sharing among mmWave cellular operators is established and it is shown that sharing spectrum licenses increases the per-user rate when antennas have narrow beams and is also favored when there is a low density of users.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
On the optimal feedback rate in interference-limited multi-antenna cellular systems
IEEE Transactions on Wireless Communications, 15(8), 5748–5762.
Contributors: J. Park *, N. Lee *, J. Andrews * & *
author keywords: MIMO; Limited feedback; cellular network; stochastic geometry
TL;DR:
A tight lower bound is found on the optimum number of feedback bits to maximize the net spectral efficiency, which captures the overall system gain by considering both of downlink and uplink spectral efficiency using limited feedback.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
On the security of millimeter wave vehicular communication systems using random antenna subsets
IEEE Vehicular Technology Conference, 0.
Contributors: M. Eltayeb*, J. Choi *, T. Al-Naffouri * & *
TL;DR:
The proposed physical layer precoding technique exploits the large dimensional antenna arrays available at mmWave systems to produce direction dependent transmission that results in coherent transmission to the legitimate receiver and artificial noise that jams eavesdroppers with sensitive receivers.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
On wirelessly powered communications with short packets
2016 IEEE Globecom Workshops, GC Wkshps 2016 - Proceedings.
Contributors: T. Khan *, * & P. Popovski *
TL;DR:
Numerical results suggest that power control is essential for improving the achievable rate of the system in the finite blocklength regime.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 conference paper
One-bit ADCs in wideband massive MIMO systems with OFDM transmission
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2016-May, 3386–3390.
Contributors: C. Mollen*, J. Choi *, E. Larsson * & *
TL;DR:
It is found that single-carrier systems and OFDM systems are affected in the same way by one-bit quantizers in wideband systems because the distribution of the quantization noise becomes the same in both systems as the number of channel taps grows.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Opportunistic beam training with hybrid analog/digital codebooks for mmWave systems
2015 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2015, 315–319.
Contributors: M. Eltayeb*, A. Alkhateeb *, * & T. Al-Naffouri *
TL;DR:
A beam training algorithm is proposed that efficiently designs the beamforming vectors with low training overhead and achieves a comparable rate to that obtained by exhaustive search solutions while requiring lower training overhead when compared to prior work.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Performance Analysis of Outdoor mmWave Ad Hoc Networks
IEEE Transactions on Signal Processing, 64(15), 4065–4079.
author keywords: Millimeter wave; mmWave; stochastic geometry; ad hoc; transmission capacity
TL;DR:
A stochastic geometry approach is used to characterize the one-way and two-way signal-to-interference ratio distribution of a mmWave ad hoc network with directional antennas, random blockages, and ALOHA channel access and shows that a fundamental limitation of an ad hocnetwork, interference, may still be an issue.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Performance analysis of beam sweeping in millimeter wave assuming noise and imperfect antenna patterns
IEEE Vehicular Technology Conference, 0.
Contributors: V. Va * & *
TL;DR:
This work analyzes the performance of beam alignment methods based on the hierarchical beam sweeping that are adopted in IEEE 802.11ad and IEEE802.15.3c to incorporate both effects and derive probability of misalignment not only with respect to the best path but also to secondary ones.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Physical layer security in large-scale millimeter wave ad hoc networks
2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings.
TL;DR:
The potential of physical layer security in the mmWave ad hoc networks is explored and it is revealed that in the low transmit power regime, the use of low mmWave frequency achieves better secrecy performance, when increasing transmit power, a transition from low mm Wave frequency to high mmWave Frequency is demanded for obtaining more secrecy rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Properties of real and complex ETFs and their application to the design of low coherence frames
Linear Algebra and Its Applications, 508, 81–90.
Contributors: C. Rusu *, N. González-Prelcic * & *
author keywords: Equiangular tight frames; Mutual coherence; Average coherence
TL;DR:
New properties for Gram matrices of equiangular tight frames are conveyed and they are used to construct new frames with low average and worst case coherences.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Rate analysis and feasibility of dynamic TDD in 5G cellular systems
2016 IEEE International Conference on Communications, ICC 2016.
Contributors: A. Gupta *, M. Kulkarni*, E. Visotsky*, F. Vook*, A. Ghosh *, J. Andrews *, *
TL;DR:
With appropriate interference mitigation, dynamic TDD offers a significant gain in data rates as compared to static TDD, which is higher when the BSs are lightly loaded and/or the fraction of UL users is low.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
Restricted secondary licensing for mmWave cellular: How much gain can be obtained?
2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings.
Contributors: A. Gupta *, A. Alkhateeb *, J. Andrews * & *
TL;DR:
This paper model a mmWave cellular system where an operator that primarily owns an exclusive-use license of a certain band can sell a restricted secondary license of the same band to another operator, which has a restriction on the maximum interference it can cause to the original network.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Robust Analog Precoding Designs for Millimeter Wave MIMO Transceivers with Frequency and Time Division Duplexing
IEEE Transactions on Communications, 64(11), 4622–4634.
Contributors: P. Xia *, * & N. Gonzalez-Prelcic *
author keywords: Millimeter Wave Communications; MIMO; Precoding; Beam Steering; Iterative Algorithms; Numerical Analysis
TL;DR:
This paper exploits the power iteration principle and proposes a robust analog precoding training algorithm that can be applied in both frequency division duplex transmission systems and time division dupLex transmission systems with or without RF calibration.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2016 journal article
Spectral efficiency scaling laws in dense random wireless networks with multiple receive antennas
IEEE Transactions on Information Theory, 62(3), 1344–1359.
Contributors: N. Lee *, F. Baccelli* & *
author keywords: Area spectral efficiency; stochastic geometry; MIMO; wireless networks
TL;DR:
This paper considers large random wireless networks, where transmit-and-receive node pairs communicate within a certain range while sharing a common spectrum and finds that when the receiver only exploits CSIR for the direct link, the sum spectral efficiency increases linearly with the density, provided the number of receive antennas increases as a certain superlinear function of the density.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 conference paper
The use of unit norm tight measurement matrices for one-bit compressed sensing
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2016-May, 4044–4048.
Contributors: C. Rusu *, N. Gonzalez-Prelcic * & *
TL;DR:
From the analytical and experimental results, it is concluded that when implementing one-bit compressed sensing schemes with fixed measurement matrices unit norm tight frames are the measurements of choice.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Three-dimensional beamforming for large-scale FD-MIMO systems exploiting statistical channel state information
IEEE Transactions on Vehicular Technology, 65(11), 8992–9005.
author keywords: Full-dimension multiple-input multiple-output (FD-MIMO); multiuser transmission; statistical channel state information (CSI); 3-D beamforming
TL;DR:
This paper provides a practical downlink transmission approach for single-cell full-dimension multiple-input-multiple-output (FD-MIMO) systems with large-scale uniform planar antenna array at the base station with assumption of only statistical channel state information at the BS.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2016 journal article
Vehicular ad-hoc network simulations of overtaking maneuvers on two-lane rural highways
Transportation Research Part C: Emerging Technologies, 72, 60–76.
Contributors: M. Motro*, A. Chu *, J. Choi *, P. Lavieri *, A. Pinjari *, C. Bhat *, J. Ghosh *, *
TL;DR:
The results suggest that the most important step in paving the way toward advanced driver assistance systems for rural highway overtaking maneuvers is to broaden the communication range of DSRC devices.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
A stochastic geometry approach to analyzing cellular networks with semi-static clustering
2015 IEEE Global Communications Conference, GLOBECOM 2015.
Contributors: T. Khan *, X. Zhang * & *
TL;DR:
A simple clustering and user scheduling algorithm is proposed and it is shown that the outage probability of semi-static clustering decays at the same order as that of static clustering, indicating that in the asymptotic regime, the performance gain provided by semi- Static clustering can be characterized by a linear factor.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 article
Accuracy in the palm of your hand: Centimeter positioning with a smartphone-quality GNSS antenna
GPS World, Vol. 26, pp. 16–31. http://www.scopus.com/inward/record.url?eid=2-s2.0-84964573502&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2015 conference paper
Achievable rates of multi-user millimeter wave systems with hybrid precoding
2015 IEEE International Conference on Communication Workshop, ICCW 2015, 1232–1237.
Contributors: A. Alkhateeb *, * & G. Leus *
TL;DR:
A low complexity hybrid analog/digital precoding algorithm for downlink multi-user mmWave systems and shows its asymptotic optimality at large numbers of antennas, and makes useful insights for more general cases.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Adaptive hybrid precoding and combining in MmWave multiuser MIMO systems based on compressed covariance estimation
2015 IEEE 6th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMSAP 2015, 213–216.
Contributors: R. Méndez-Rial*, N. González-Prelcic * & *
TL;DR:
An adaptive multi user (MU) single-cell hybrid precoding strategy that iteratively designs the precoders/combiners exploiting the reciprocity of time division duplex (TDD) millimeter wave systems is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Adaptive one-bit compressive sensing with application to low-precision receivers at mmWave
2015 IEEE Global Communications Conference, GLOBECOM 2015.
Contributors: C. Rusu *, R. Mendez-Rial*, N. Gonzalez-Prelcic * & *
TL;DR:
An adaptive one-bit compressed sensing scheme is developed that can be used at low-resolution mmWave receivers for channel estimation and outperforms the fixed one in the context of mmWave channel estimation.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Advanced limited feedback designs for FD-MIMO using uniform planar arrays
2015 IEEE Global Communications Conference, GLOBECOM 2015.
TL;DR:
This paper numerically study the characteristics of FD-MIMO channels using a three-dimensional (3D) channel model that captures realistic channel properties and identifies a limitation of conventional Kronecker-product codebooks and proposes advanced channelquantization techniques that can further improve channel quantization quality.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 conference paper
An attack on antenna subset modulation for millimeter wave communication
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2015-August, 2914–2918.
Contributors: C. Rusu *, N. González-Prelcic * & *
TL;DR:
This paper shows that ASM is not robust to an eavesdropper that makes multiple simultaneous measurements at multiple angles, and simulations show the performance of the estimation algorithms and how the eavesdroppers can effectively recover the information if the signal-to-noise ratio exceeds a certain threshold.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
An indoor correlated shadowing model
2015 IEEE Global Communications Conference, GLOBECOM 2015.
Contributors: X. Zhang *, F. Baccelli* & *
TL;DR:
This model gives the first tractable mathematical abstraction to indoor physical environments where wireless signals are shadowed by (common) walls and develops a formula for success probabilities of a transmission attempt between two given rooms.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Analysis of self-body blocking effects in millimeter wave cellular networks
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2015-April, 1921–1925.
TL;DR:
A mathematical model for self-body blocking is proposed, allowing for position changes, and used to compute signal-to-interference-plus-noise ratio (SINR) distributions with two possible user association rules, and characterize how self- body blocking impacts the SINR coverage.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 journal article
Artificial-noise-aided secure multi-antenna transmission with limited feedback
IEEE Transactions on Wireless Communications, 14(5), 2742–2754.
Contributors: X. Zhang *, M. McKay *, X. Zhou * & *
author keywords: Artificial noise; adaptive transmission; limited feedback; physical-layer security; power allocation
TL;DR:
This work proposes an adaptive transmission strategy that judiciously selects the wiretap coding parameters, as well as the power allocation between the artificial noise and the information signal, and finds that 8 feedback bits per transmit antenna is sufficient to achieve approximately 90% of the throughput attainable with perfect feedback.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Asymptotic SINR for millimeter wave massive MIMO cellular networks
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2015-August, 620–624.
TL;DR:
A stochastic geometry framework for evaluating the performance in large-scale mmWave massive MIMO networks is proposed and numerical results indicate a fast convergence in the SINR distribution to its asymptotic equivalence in dense mmWave networks.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Augmented covariance estimation with a cyclic approach in DOA
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2015-August, 2784–2788.
Contributors: R. Mendez-Rial *, N. Gonzalez-Prelcic * & *
TL;DR:
The new method exploits the periodicity of the covariance lags when the DOAs are assumed on a discrete grid with a certain resolution and achieves twice the resolution of typical methods such as the direct augmentable approach or forward backward spatial smoothing.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Base station cluster patterns for semi-static multi-cell cooperation in irregular network topologies
2015 23rd European Signal Processing Conference, EUSIPCO 2015, 2441–2445.
TL;DR:
The key idea of the proposed clustering is to use the 2nd-order Voronoi region to form BS clusters that are mapped into a particular cluster pattern by exploiting the edge-coloring in graph theory.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 journal article
Capacity Analysis of One-Bit Quantized MIMO Systems with Transmitter Channel State Information
IEEE Transactions on Signal Processing, 63(20), 5498–5512.
Contributors: J. Mo * & *
author keywords: Analog-to-digital convertor; millimeter wave; MIMO channel; one-bit quantization
TL;DR:
This paper analyzes the flat fading multiple-input multiple-output (MIMO) channel with one-bit ADCs and derives the exact channel capacity and proposes an efficient method to design the input symbols to approach the capacity achieving solution.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Channel estimation and hybrid combining for mmWave: Phase shifters or switches?
2015 Information Theory and Applications Workshop, ITA 2015 - Conference Proceedings, 90–97.
Contributors: R. Mendez-Rial *, C. Rusu *, A. Alkhateeb *, N. Gonzalez-Prelcic * & *
TL;DR:
A different hybrid architecture is proposed, which simplifies the hardware at the receiver by replacing the phase shifters with switches and a new approach for compressed sensing based channel estimation for the hybrid architectures is presented.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Channel estimation in millimeter wave MIMO systems with one-bit quantization
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2015-April, 957–961.
Contributors: J. Mo *, P. Schniter *, N. Prelcic * & *
TL;DR:
A modified EM algorithm is proposed that exploits sparsity and has better performance than the conventional EM algorithm and is presented as a solution to the channel estimation problem for millimeter wave MIMO systems with one-bit analog-to-digital converters.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Compressed sensing based multi-user millimeter wave systems: How many measurements are needed?
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2015-August, 2909–2913.
TL;DR:
This paper proposes and evaluates a downlink system operation for multi-user mmWave systems based on compressed sensing channel estimation and conjugate analog beamforming, and shows how many compressed sensing measurements are needed to approach the perfect channel knowledge performance.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 journal article
Coverage and rate analysis for millimeter-wave cellular networks
IEEE Transactions on Wireless Communications, 14(2), 1100–1114.
author keywords: Millimeter wave; fifth generation cellular networks; stochastic geometry; performance analysis
TL;DR:
A general framework to evaluate the coverage and rate performance in mmWave cellular networks is proposed, and the results show that dense mmWave networks can achieve comparable coverage and much higher data rates than conventional UHF cellular systems, despite the presence of blockages.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 journal article
Delay-constrained video transmission: Quality-driven resource allocation and scheduling
IEEE Journal on Selected Topics in Signal Processing, 9(1), 60–75.
author keywords: Resource allocation; statistical QoS; rate distortion theory; perceptual video quality; effective capacity
TL;DR:
This work considers a multiuser setup whereby different users have (possibly different) delay QoS constraints, and derives the resource allocation policy that maximizes the sum video quality and applies to any quality metric with concave rate-quality mapping.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Dictionary-free hybrid precoders and combiners for mmWave MIMO systems
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2015-August, 151–155.
Contributors: R. Mendez-Rial *, C. Rusu *, N. Gonzalez-Prelcic * & *
TL;DR:
A low complexity hybrid precoding design for the architecture based on phase shifters is proposed, a greedy algorithm based on the orthogonal matching pursuit algorithm but replacing the costly correlation operations over a dictionary with the element-wise normalization of the first singular vector of the residual.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 journal article
Distributed real-time implementation of interference alignment with analog feedback
IEEE Transactions on Vehicular Technology, 64(8), 3513–3525.
Contributors: S. Lee*, A. Gerstlauer * & *
author keywords: Interference alignment (IA); prototyping
TL;DR:
This paper presents the first investigation of real-time IA performance on a fully distributed 2 $\times$ 2 multiple-input–multiple-output (MIMO) prototype system with three physically independent user pairs and demonstrates that the theoretical multiplexing gain can be reached in practical systems with a constant sum rate loss that remains within 5 bits/Hz/s compared with an ideal simulation.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 journal article
Distributed space-time interference alignment with moderately delayed CSIT
IEEE Transactions on Wireless Communications, 14(2), 1048–1059.
Contributors: N. Lee *, R. Tandon * & *
author keywords: Space-time interference alignment; delayed CSIT; interference networks
TL;DR:
A major implication of derived results is that distributed and moderately delayed CSIT is useful to strictly improve the sum-DoF over the case of no CSI at the transmitter in a certain class of interference networks.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 journal article
Enabling 5G: Energy and spectrally efficient communication systems
Transactions on Emerging Telecommunications Technologies, 26(1), 1–2.
Contributors: R. Tafazolli*, S. Palazzo *, M. Payarõ * & *
TL;DR:
This Special Issue is to present some of the most promising and novel approaches in analyzing, designing and optimizing energy and spectrum constrained 5G communication systems focusing on the physical, link, and network layer aspects.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Energy coverage in millimeter wave energy harvesting networks
2015 IEEE Globecom Workshops, GC Wkshps 2015 - Proceedings.
Contributors: T. Khan *, A. Alkhateeb * & *
TL;DR:
This work analyzes the energy harvesting performance at receivers powered by a mmWave cellular network and suggests that mmWave energy harvesting could provide a substantial performance boost compared to lower frequency solutions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Ergodic capacity in mmWave ad hoc network with imperfect beam alignment
Proceedings - IEEE Military Communications Conference MILCOM, 2015-December, 1479–1484.
TL;DR:
This paper quantifies both the ergodic capacity of a mmWave ad hoc network with perfect alignment and the lost capacity when error is introduced, and shows that even relatively small errors in alignment can lead to significant er godic capacity reduction.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Frequency selective hybrid precoding in millimeter wave OFDMA systems
2015 IEEE Global Communications Conference, GLOBECOM 2015.
Contributors: S. Park * & *
TL;DR:
This paper proposes an algorithm to jointly optimize the wideband analog beamformers and the per- subcarrier digital precoders and shows that the optimized approach achieves good performance in terms of beamforming gain.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 journal article
Index Coding With Coded Side-Information
IEEE Communications Letters, 19(3), 319–322.
Contributors: N. Lee *, A. Dimakis* & *
author keywords: Index coding and coded side-information
TL;DR:
It is shown that the optimal binary vector index code length is equal to the minimum rank (minrank) of a matrix whose elements consist of the sets of desired packet indices and side-information encoding matrices.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Interference in finite-sized highly dense millimeter wave networks
2015 Information Theory and Applications Workshop, ITA 2015 - Conference Proceedings, 175–180.
Contributors: K. Venugopal *, M. Valenti* & *
TL;DR:
The paper considers the effect of blockages, which are primarily caused by the human bodies present in the operating environment, and develops expressions for coverage and rate, which capture the effects of key antenna characteristics such as directivity and gain.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Interference statistics in a random mmWave ad hoc network
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2015-August, 2904–2908.
TL;DR:
A derivation of the instantaneous interference-to-noise ratio (INR) distribution of a mmWave ad hoc network is presented and it is shown that with a reasonable choice of system parameters, the interference is nearly always stronger than the noise power in dense networks.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 journal article
Limited Feedback Hybrid Precoding for Multi-User Millimeter Wave Systems
IEEE Transactions on Wireless Communications, 14(11), 6481–6494.
Contributors: A. Alkhateeb *, G. Leus * & *
author keywords: Millimeter wave communication; multi-user hybrid precoding; limited-feedback
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 journal article
Loss Visibility Optimized Real-Time Video Transmission over MIMO Systems
IEEE Transactions on Multimedia, 17(10), 1802–1817.
author keywords: Limited feedback; loss visibility; multiple-input multiple-output (MIMO); packet loss; unequal error protection; video signal processing
TL;DR:
This paper introduces an architecture for real-time video transmission over multiple-input multiple-output (MIMO) wireless communication systems using loss visibility side information and shows that the solution enables jointly reaping gains in terms of improved video quality and lower latency.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Low complexity hybrid sparse precoding and combining in millimeter wave MIMO systems
IEEE International Conference on Communications, 2015-September, 1340–1345.
Contributors: C. Rusu *, R. Mendez-Rial*, N. Gonzalez-Prelcicy* & *
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 journal article
Metrocell antennas: The positive impact of a narrow vertical beamwidth and electrical downtilt
IEEE Vehicular Technology Magazine, 10(3), 51–59.
TL;DR:
It is demonstrated that the network spectral efficiency and average user through-put both increase as the vertical beamwidth decreases and downtilt is applied to metrocell transmission, and the network becomes more energy efficient.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Millimeter wave power transfer and information transmission
2015 IEEE Global Communications Conference, GLOBECOM 2015.
Contributors: L. Wang *, M. Elkashlan *, * , M. Di Renzo * & K. Wong*
TL;DR:
This paper considers users with large energy storage that are recharged by the mmWave base stations prior to uplink information transmission, and analyzes the average harvested energy and average achievable rate to show that when increasing the base station density, a transition from a noise- limited regime to an interference-limited regime is observed.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 conference paper
MmWave ad hoc network coverage and capacity
IEEE International Conference on Communications, 2015-September, 1310–1315.
TL;DR:
A stochastic geometry approach is used to characterize the coverage probability of a mmWave ad hoc network with directional antennas and random building blockages and shows that mmWave networks support larger densities, higher area spectral efficiencies, and better rate coverage compared to traditional, lower-frequency ad hoc networks.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Multi-layer precoding for full-dimensional massive MIMO systems
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2015-April, 815–819.
Contributors: A. Alkhateeb *, G. Leus * & *
TL;DR:
Simulation results show the potential gains of multi-layer precoding compared with traditional pilot-contaminated massive MIMO setups despite the low channel knowledge requirements and the low-complexity implementation.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Near maximum-likelihood detector with one-bit ADCs for multiuser massive MIMO systems
2015 IEEE 6th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMSAP 2015, 397–400.
Contributors: J. Choi * & *
TL;DR:
Simulation results show that the proposed nML detector can simultaneously support multiple users using higher-order constellations, e.g., 16 quadrature amplitude modulation, and performs much better than a simple zeroforcing (ZF)-type detector.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
On the spatial spectral efficiency of ITLinQ
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2015-April, 1806–1810.
Contributors: R. Mungara*, X. Zhang *, A. Lozano * & *
TL;DR:
This paper analytically characterizes the spectral efficiency of the ITLinQ channelization technique and relies on a stochastic geometry formulation, which enables obtaining compact expressions while opening the door to an optimization of IT LinQ's parameters.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Optimizing the target error rate for link adaptation
2015 IEEE Global Communications Conference, GLOBECOM 2015.
Contributors: S. Park *, R. Daniels* & *
TL;DR:
This paper derives a closed form expression for the optimal target block error rate (BLER) that maximizes the throughput with hybrid automatic repeat request (HARQ) and shows that the optimal BLER target is inversely proportional to the SINR.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 journal article
Performance Analysis of Cooperative Wireless Networks with Unreliable Backhaul Links
IEEE Communications Letters, 19(8), 1386–1389.
Contributors: T. Khan *, P. Orlik, K. Kim & *
author keywords: Cooperative wireless networks; backhaul; Bernoulli-weighted exponential
TL;DR:
A general expression is derived for the complementary cumulative distribution function of a sum of K independent random variables, where each random variable is a product of an exponential and a Bernoulli random variable, and applied to find a simple closed-form expression that characterizes the system outage performance as a function of network parameters and node geometry.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Performance analysis of pair-wise dynamic multi-user joint transmission
IEEE International Conference on Communications, 2015-September, 3981–3986.
TL;DR:
The key finding is that the pair-wise dynamic BS cooperation through MU-JT provides a better rate coverage performance than that of single-user joint transmission (SU-T) over the entire range of the rate threshold when each user is close enough to the associated BS.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Performance evaluation of ITLinQ and FlashLinQ for overlaid device-to-device communication
2015 IEEE International Conference on Communication Workshop, ICCW 2015, 596–601.
Contributors: R. Mungara*, X. Zhang *, A. Lozano * & *
TL;DR:
A performance evaluation of ITLinQ and FlashLinQ, the two most popular schemes proposed to date to channelize D2D transmissions, are found to exercise similar mechanisms to avoid situations of excessive interference, yielding substantial improvements with respect to unchannelized networks.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 journal article
Power control for D2D underlaid cellular networks: Modeling, algorithms, and analysis
IEEE Journal on Selected Areas in Communications, 33(1), 1–13.
Contributors: N. Lee *, X. Lin *, J. Andrews * & *
author keywords: Power control; device-to-device communication; cellular networks; Poisson point process; stochastic geometry
Source: ORCID
Added: September 11, 2020
2015 journal article
Rate adaptation and admission control for video transmission with subjective quality constraints
IEEE Journal on Selected Topics in Signal Processing, 9(1), 22–36.
Contributors: C. Chen *, X. Zhu *, G. De Veciana *, A. Bovik * & *
author keywords: Quality of experience; video transport; rate adaptation; admission control; wireless networks
TL;DR:
This work shows how the QoE of video users can be improved by rate adaptation and admission control, and proposes a threshold-based admission control policy to block users whose empirical cumulative quality distribution is not likely to satisfy their QOE constraint.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Retrospective interference alignment for two-cell uplink MIMO cellular networks with delayed CSIT
IEEE International Conference on Communications, 2015-September, 4144–4150.
TL;DR:
It is shown that having delayed CSIT can strictly increase the sum-DoF compared to the case of no CSIT, and the retrospective interference alignment can achieve the optimal sum- doF in the context of two-cell two-user scenario by providing a new outer bound.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 journal article
Space-Time Physical-Layer Network Coding
IEEE Journal on Selected Areas in Communications, 33(2), 323–336.
Contributors: N. Lee * & *
author keywords: Physical-layer network coding; space-time precoding; multi-way relay channels
TL;DR:
A space-time physical-layer network coding method is presented for information exchange among multiple users over fully connected multiway relay networks and it is shown that ST-PNC improves the sum of degrees of freedom (sum-DoF) of the network compared to existing interference management methods.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2015 journal article
Spectral efficiency of dynamic coordinated beamforming: A stochastic geometry approach
IEEE Transactions on Wireless Communications, 14(1), 230–241.
Contributors: N. Lee *, D. Morales-Jimenez *, A. Lozano * & *
author keywords: Coordinated beamforming; dynamic clustering; stochastic geometry
TL;DR:
The results indicate that coordinated beamforming is most beneficial to users that are in the outer part of their cells yet in the inner part oftheir coordination cluster and that the optimal cluster cardinality for the typical user is small and it scales with the fading coherence.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Spectral efficiency of massive MIMO systems with D2D underlay
IEEE International Conference on Communications, 2015-September, 4345–4350.
Contributors: X. Lin *, * & J. Andrews *
TL;DR:
This paper finds that the received signal-to-interference-plus-noise ratio (SINR) of any cellular user increases unboundedly and the effects of noise, fast fading, and the interfering signals from the other co-channel cellular users and the infinite D2D transmitters vanish completely.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 journal article
The interplay between massive MIMO and underlaid D2D networking
IEEE Transactions on Wireless Communications, 14(6), 3337–3351.
Contributors: X. Lin *, * & J. Andrews *
author keywords: Massive MIMO; device-to-device; cellular networks; spectral efficiency; stochastic geometry
TL;DR:
This paper investigates cellular and D2D spectral efficiencies under both perfect and imperfect channel state information (CSI) at the receivers that employ partial zero-forcing, and derives simple analytical lower bounds for both the cellular and underlaid D1D spectral efficiency.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Threshold-based antenna selection algorithm for dense cloud radio access networks
2015 IEEE Global Communications Conference, GLOBECOM 2015.
Contributors: J. Park * & *
TL;DR:
A threshold-based antenna selection algorithm for uplink dense cloud radio access networks (C- RANs), where a baseband processor unit (BBU) cloud is separately placed from densely deployed remote radio heads (RRHs) is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2015 conference paper
Uplink massive MIMO SIR analysis: how do antennas scale with users?
2015 IEEE Global Communications Conference, GLOBECOM 2015.
TL;DR:
A scaling law between the number of base station antennas and scheduled users per cell is provided to preserve the uplink SIR distribution in massive MIMO networks, where the impacts of correlation in small-scale fading and power control in the form of fractional path loss compensation are taken account.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 journal article
A phase-reconstruction technique for low-power centimeter-accurate mobile positioning
IEEE Transactions on Signal Processing, 62(10), 2595–2610.
Contributors: K. Pesyna*, Z. Kassas *, R. Heath Jr. & T. Humphreys *
author keywords: Carrier phase differential GNSS (CDGNSS); Global Positioning System (GPS); inertial measurement unit (IMU); integer ambiguity resolution; Kalman filtering; low-power positioning; precise positioning; real time kinematic (RTK); satellite navigation
TL;DR:
A carrier phase reconstruction technique is presented as an enabler for low-power centimeter-accurate mobile positioning and indicates that coupling a GNSS receiver with a consumer-grade inertial measurement unit enables reliable phase reconstruction with phase measurement duty cycles as low as 5%.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Adaptive video transmission with subjective quality constraints
2014 IEEE International Conference on Image Processing, ICIP 2014, 2477–2481.
Contributors: C. Chen *, X. Zhu *, G. De Veciana *, A. Bovik * & *
TL;DR:
A rate-adaptation algorithm is proposed that can incorporate QoE constraints on the empirical cumulative quality distribution per user and can reduce network resource consumption over conventional average-quality maximized rate- Adaptation algorithms.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 journal article
Analysis of blockage effects on urban cellular networks
IEEE Transactions on Wireless Communications, 13(9), 5070–5083.
Contributors: T. Bai*, R. Vaze * & *
author keywords: Cellular network; blockage effect; stochastic geometry; random shape theory
TL;DR:
The distribution of the number of blockages in a link is proven to be a Poisson random variable with parameter dependent on the length of the link, and the results show that the base station density should scale superlinearly with the blockage density to maintain the network connectivity.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Analysis of small cell partitioning in urban two-tier heterogeneous cellular networks
2014 11th International Symposium on Wireless Communications Systems, ISWCS 2014 - Proceedings, 739–743.
Contributors: M. Taranetz*, T. Bai*, * & M. Rupp *
TL;DR:
The results show that isolation by wall partitioning can enhance indoor rate, and that the improvement is more sensitive to building density, rather than penetration loss per building.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Artificial-noise-aided secure multi-antenna transmission in slow fading channels with limited feedback
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3968–3972.
Contributors: X. Zhang *, X. Zhou *, M. McKay * & R. Heath Jr.
TL;DR:
This system using the artificial-noise-aided beamforming approach to enhance secrecy, considering slow fading channels with outage constraints on the reliability performance of legitimate communication and the secrecy performance against eavesdropping, observes that strengthening the secrecy outage constraint puts higher requirements on the number of feedback bits and the strength of the intended channel.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Asymptotic coverage and rate in massive MIMO networks
2014 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2014, 602–606.
TL;DR:
Numerical results show that, though limited by pilot contamination, massive MIMO is still promising to provide high cell throughput by serving large number of users simultaneously.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Centimeter positioning with a smartphone-Quality GNSS antenna
27th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2014, 2, 1568–1577. http://www.scopus.com/inward/record.url?eid=2-s2.0-84939449408&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2014 journal article
Channel estimation and hybrid precoding for millimeter wave cellular systems
IEEE Journal on Selected Topics in Signal Processing, 8(5), 831–846.
Contributors: A. Alkhateeb *, O. El Ayach*, G. Leus * & *
author keywords: Millimeter wave cellular systems; sparse channel estimation; adaptive compressed sensing; hybrid precoding
TL;DR:
An adaptive algorithm to estimate the mmWave channel parameters that exploits the poor scattering nature of the channel is developed and a new hybrid analog/digital precoding algorithm is proposed that overcomes the hardware constraints on the analog-only beamforming, and approaches the performance of digital solutions.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 journal article
Coordinated 3D beamforming for interference management in cellular networks
IEEE Transactions on Wireless Communications, 13(10), 5396–5410.
Contributors: N. Seifi*, J. Zhang *, * , T. Svensson * & M. Coldrey *
author keywords: Antenna tilt; base station coordination; channel state information (CSI) delay; interference management; 3D beamforming
TL;DR:
A novel transmission technique in which intercell interference management is performed via coordinating the beamforming jointly in the horizontal and vertical planes of the wireless channel, denoted as coordinated 3D beamforming is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Coordinated beamforming with dynamic clustering: A stochastic geometry approach
2014 IEEE International Conference on Communications, ICC 2014, 2165–2170.
Contributors: N. Lee *, R. Heath Jr., D. Morales-Jimenez * & A. Lozano *
TL;DR:
This paper characterizes the performance of coordinated beamforming with dynamic clustering and forms the computation of the number of coordinated BSs that maximizes the spectral efficiency for a given fading coherence, making precise the intuition that the slower the fading, the more beneficial the coordination.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 journal article
Coverage and capacity of millimeter-wave cellular networks
IEEE Communications Magazine, 52(9), 70–77.
Contributors: T. Bai*, A. Alkhateeb * & *
TL;DR:
Dense mmWave networks can achieve both higher data rates and comparable coverage relative to conventional microwave networks, andSum rate gains can be achieved using more advanced beamforming techniques that allow multiuser transmission.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Cross-polarization RF precoding to mitigate mobile misorientation and polarization leakage
2014 IEEE 11th Consumer Communications and Networking Conference, CCNC 2014, 581–586.
Contributors: A. Khalek*, R. Heath Jr., S. Rajagopal*, S. Abu-Surra* & J. Zhang
TL;DR:
A beamforming algorithm is proposed that jointly designs the horizontal and vertical beamformers and combiners to maximize spectral efficiency in the presence of mobile misorientation and polarization leakage and derives the maximum likelihood estimate of the azimuth and elevation mobile rotation.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 conference paper
FER prediction with variable codeword length
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 1931–1935.
Contributors: A. Rico-Alvarino*, * & C. Mosquera *
TL;DR:
This paper derives a low complexity FER estimator for frames of different length transmitted over a binary symmetric channel of unknown error probability and extends this technique to coded systems by the use of effective SNR FER predictors.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 journal article
Five disruptive technology directions for 5G
IEEE Communications Magazine, 52(2), 74–80.
Contributors: F. Boccardi*, R. Heath Jr., A. Lozano *, T. Marzetta * & P. Popovski *
TL;DR:
Five technologies that could lead to both architectural and component disruptive design changes: device-centric architectures, millimeter wave, massive MIMO, smarter devices, and native support for machine-to-machine communications are described.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 conference paper
High SNR capacity of millimeter wave MIMO systems with one-bit quantization
2014 Information Theory and Applications Workshop, ITA 2014 - Conference Proceedings.
Contributors: J. Mo * & *
TL;DR:
Bounds on the high signal-to-noise ratio (SNR) capacity are derived for the single-input multiple-output (SIMO) channel and the general MIMO channel with very low resolution one-bit ADCs.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Impact of 3D base station antenna in random heterogeneous cellular networks
IEEE Wireless Communications and Networking Conference, WCNC, 2254–2259.
Contributors: X. Li *, T. Bai* & *
TL;DR:
It is found that narrowing the vertical beamwidth of the pico cell must be accompanied by downtilt to result in improved coverage and capacity, and high building density leads to improved network performance, motivating the deployment of heterogeneous networks in dense urban areas.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Joint transmission mode and tilt adaptation in coordinated small-cell networks
2014 IEEE International Conference on Communications Workshops, ICC 2014, 598–603.
Contributors: N. Seifi*, * , M. Coldrey * & T. Svensson *
TL;DR:
A novel hybrid-mode transmission technique is proposed that can achieve a performance comparable to that of a fully coordinated transmission but with a significantly lower complexity and signaling requirement.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 journal article
Learning-based adaptive transmission for limited feedback multiuser MIMO-OFDM
IEEE Transactions on Wireless Communications, 13(7), 3806–3820.
Contributors: A. Rico-Alvariño* & R. Heath Jr.
author keywords: IEEE 802.11ac; link adaptation; machine learning; multiuser multiple input multiple output (MIMO)-orthogonal frequency division multiplexing (OFDM)
TL;DR:
This paper presents a data-driven approach to link adaptation for multiuser multiple input mulitple output (MIMO) OFDM systems, and a new approximation is developed to estimate the unknown interuser interference due to the use of limited feedback.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 journal article
MIMO for millimeter-wave wireless communications: Beamforming, spatial multiplexing, or both?
IEEE Communications Magazine, 52(12), 110–121.
Contributors: S. Sun *, T. Rappaport *, * , A. Nix* & S. Rangan *
TL;DR:
This tutorial explores the fundamental issues involved in selecting the best communications approaches for mmWave frequencies, and provides insights, challenges, and appropriate uses of each MIMO technique based on early knowledge of the mmWave propagation environment.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 journal article
MIMO precoding and combining solutions for millimeter-wave systems
IEEE Communications Magazine, 52(12), 122–131.
Contributors: A. Alkhateeb *, J. Mo *, N. González-Prelcic * & R. Heath Jr
TL;DR:
How beamforming and precoding are different in MIMO mmWave systems than in their lower-frequency counterparts, due to different hardware constraints and channel characteristics are explained.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Millimeter wave cellular channel models for system evaluation
2014 International Conference on Computing, Networking and Communications, ICNC 2014, 178–182.
Contributors: T. Bai*, V. Desai* & R. Heath Jr.
TL;DR:
A simple channel model is presented for evaluating system level performance in mmWave cellular networks and it is observed that mmWave networks can provide comparable coverage probability with a dense deployment, leading to much higher data rates thanks to the large bandwidth available in the mmWave spectrum.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 journal article
Modeling the time-Varying subjective quality of HTTP video streams with rate adaptations
IEEE Transactions on Image Processing, 23(5), 2206–2221.
Contributors: C. Chen *, L. Choi *, G. De Veciana *, C. Caramanis*, * & A. Bovik *
author keywords: QoE; HTTP-based streaming; time-varying subjective quality
TL;DR:
A Hammerstein-Wiener model is presented for predicting the time-varying subjective quality (TVSQ) of rate-adaptive videos and it is shown that the model is able to reliably predict the TVSQ of rate adaptive videos.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Optimal training in continuous flat-fading massive MIMO systems
20th European Wireless Conference, EW 2014, 219–224. http://www.scopus.com/inward/record.url?eid=2-s2.0-84916918363&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2014 conference paper
Secure communication in cellular networks: The benefits of millimeter wave mobile broadband
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2014-October(October), 115–119.
Contributors: L. Wang *, M. Elkashlan *, T. Duong * & *
TL;DR:
Numerical results corroborate the analysis and show that mmWave systems can enable significant secrecy improvement and be indicated that with large antenna arrays, multi-gigabit per second secure link at the mmWave frequencies can be reached in the delay-tolerant transmission mode and the adverse effect of secrecy outage vanishes in thedelay-limited transmission mode.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 journal article
Signal processing for the 5G revolution
IEEE Signal Processing Magazine, 31(6), 12–13.
Contributors: * , G. Laus, T. Quek *, S. Talwar* & P. Zhou
Source: ORCID
Added: September 11, 2020
2014 conference paper
Single-sided adaptive estimation of multi-path millimeter wave channels
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2014-October(October), 125–129.
Contributors: A. Alkhateeb *, O. El Ayach*, G. Leus * & *
TL;DR:
A mmWave channel estimation algorithm that exploits the sparse nature of the channel and leverages tools from adaptive compressed sensing to efficiently estimate the channel with a small training overhead is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2014 journal article
Space-time interference alignment and degree-of-freedom regions for the MISO broadcast channel with periodic CSI feedback
IEEE Transactions on Information Theory, 60(1), 515–528.
author keywords: Delayed channel state information feedback; interference alignment; vector broadcast channel
TL;DR:
A crucial insight is that it is possible to achieve the optimal DoF gain if the feedback delay is less than a derived fraction of the channel coherence time, which precisely characterizes the intuition that a small delay should be negligible.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2014 conference paper
Space-time physical-layer network coding: Harnessing interference in multi-way communication
2014 IEEE Global Communications Conference, GLOBECOM 2014, 1559–1564.
Contributors: N. Lee * & *
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2014 journal article
Spatially sparse precoding in millimeter wave MIMO systems
IEEE Transactions on Wireless Communications, 13(3), 1499–1513.
author keywords: Millimeter wave; multiple-input multiple-output (MIMO); antenna arrays; beamforming; precoding; cellular communication; sparsity; sparse reconstruction; basis pursuit; limited feedback
TL;DR:
This paper considers transmit precoding and receiver combining in mmWave systems with large antenna arrays and develops algorithms that accurately approximate optimal unconstrained precoders and combiners such that they can be implemented in low-cost RF hardware.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2013 journal article
A current perspective on distributed antenna systems for the downlink of cellular systems
IEEE Communications Magazine, 51(4), 161–167.
Contributors: * , S. Peters, Y. Wang * & J. Zhang *
TL;DR:
A key observation is that distributed antenna systems are tightly integrated into the cellular architecture, and incorporate physical layer technologies like MIMO communication and multiuser MIMo to provide higher data rates.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
A distributed algorithm using interference pricing for relay interference channels
Eurasip Journal on Advances in Signal Processing, 2013(1).
Contributors: K. Truong * & *
TL;DR:
A two-step algorithm for relay design for the relay interference channel, which models a relay-based cellular system, outperforms the other designs, including the naive approach of applying the single-hop interference pricing strategies on two hops.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
A dynamic system model of time-varying subjective quality of video streams over HTTP
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3602–3606.
Contributors: C. Chen *, L. Choi *, G. De Veciana *, C. Caramanis*, R. Heath Jr. & A. Bovik *
TL;DR:
It is shown that the proposed model can effectively predict the TVSQ of rate-adaptive videos in an online manner, which is necessary to be able to conduct QoE-optimized online rate- Adaptation for HTTP-based video streaming.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
A markov decision model for adaptive scheduling of stored scalable videos
IEEE Transactions on Circuits and Systems for Video Technology, 23(6), 1081–1095.
Contributors: C. Chen *, * , A. Bovik * & G. De Veciana *
author keywords: Scheduling algorithm; videos transport; wireless communication
TL;DR:
Two scheduling algorithms that seek to optimize the quality of scalably coded videos that have been stored at a video server before transmission are proposed and Simulation results show that the performance of both scheduling algorithms is close to a performance upper bound.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2013 journal article
Adaptive quantization on a grassmann-manifold for limited feedback beamforming systems
IEEE Transactions on Signal Processing, 61(18), 4450–4462.
author keywords: Adaptive quantization; channel state information; Grassmann manifold; limited feedback; LTE; multi-user MIMO; OFDMA; quantized feedback
TL;DR:
It is shown that the prediction error in the tangent space associated with the Grassmann manifold behaves approximately Gaussian, provided its norm is sufficiently small.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Adaptive quantization on the Grassmann-manifold for limited feedback multi-user MIMO systems
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 5021–5025.
TL;DR:
An adaptive quantization algorithm for subspace tracking on the Grassmann-manifold of p-dimensional subspaces in the n-dimensional Euclidean space is proposed, demonstrating large throughput gains compared to memoryless quantization.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Antenna Subset Modulation for secure millimeter-wave wireless communication
2013 IEEE Globecom Workshops, GC Wkshps 2013, 1258–1263.
Contributors: N. Valliappan *, * & A. Lozano *
TL;DR:
Numerical comparisons of the SER performance and secrecy capacity of the proposed techniques against those of conventional array transmission are presented to highlight the potential of ASM.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
Antenna subset modulation for secure millimeter-wave wireless communication
IEEE Transactions on Communications, 61(8), 3231–3245.
Contributors: N. Valliappan *, A. Lozano * & R. Heath Jr.
author keywords: Antenna subset modulation; directional modulation; secure millimeter-wave communication; secrecy capacity
TL;DR:
This paper exploits the potential of large antenna arrays at millimeter-wave (mm-Wave) frequencies to develop a low-complexity directional modulation technique, Antenna Subset Modulation (ASM), for point-to-point secure wireless communication.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Base station cooperation with dynamic clustering in super-dense cloud-RAN
2013 IEEE Globecom Workshops, GC Wkshps 2013, 784–788.
Contributors: N. Lee *, * , D. Morales-Jimenez * & A. Lozano *
TL;DR:
A downlink cellular model based on stochastic geometry is put forth in order to analyze the performance of base station (BS) cooperation with dynamic clustering in highly dense BS deployments and some of the benefits of cooperation can be characterized.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
Cascaded orthogonal space-time block codes for wireless multi-hop relay networks
Eurasip Journal on Wireless Communications and Networking, 2013(1).
Contributors: R. Vaze * & R. Heath Jr.
TL;DR:
C cascaded orthogonal space–time block code (COSTBC) is proposed for the case where the source and destination are equipped with multiple antennas and each relay stage has one or more multiple antenna relays
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
Cooperative algorithms for MIMO amplify-and-forward relay networks
IEEE Transactions on Signal Processing, 61(5), 1272–1287.
Contributors: K. Truong *, P. Sartori* & R. Heath Jr.
author keywords: Interference alignment; joint source-relay design; relay beamforming; relay interference channel; relay-aided interference alignment; two-hop interference channel
TL;DR:
Three cooperative algorithms are proposed to find suboptimal solutions for end-to-end sum-rate maximization problem in a multiple-antenna amplify-and-forward (AF) relay interference channel and achieve higher end-to-end sum-rates and multiplexing gains that existing strategies for AF relays, decode-and-forward relays, and direct transmission.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Coverage analysis for millimeter wave cellular networks with blockage effects
2013 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2013 - Proceedings, 727–730.
Contributors: T. Bai* & R. Heath Jr.
TL;DR:
An analytical framework to incorporate the blockage effects and evaluate the performance of mmWave cellular networks, in terms of coverage probability and achievable rate is proposed.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Coverage and area spectral efficiency in downlink random cellular networks with channel estimation error
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 4404–4408.
Contributors: Y. Wu*, M. McKay * & *
TL;DR:
The optimal pilot-training length that maximizes the area spectral efficiency (ASE) in several asymptotic regimes is derived, and the dependence of this optimal length on the ratio between the user and base station densities is captured.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Coverage in dense millimeter wave cellular networks
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2062–2066.
Contributors: T. Bai* & R. Heath Jr.
TL;DR:
The results show that the average cell size should scale with the average size of the line-of-sight region to maintain the same coverage probability in a dense network, and that the optimum base station density should be dense enough but not too dense.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
Degrees of freedom for the two-cell two-hop MIMO interference channel: Interference-free relay transmission and spectrally efficient relaying protocol
IEEE Transactions on Information Theory, 59(5), 2882–2896.
Contributors: N. Lee * & *
author keywords: Interference channel; interference shaping; multihop; multiple-input-multiple-output (MIMO)
TL;DR:
It is shown that two cascaded interfering links can be decomposed into two independent parallel relay channels while sharing the spectrum, and a spectrally efficient relaying protocol is proposed that overcomes the loss due to half-duplex relaying constraint.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Degrees of freedom of completely-connected multi-way interference networks
IEEE International Symposium on Information Theory - Proceedings, 1571–1575.
Contributors: N. Lee * & *
TL;DR:
This paper considers a fully-connected interference network with a relay in which multiple users equipped with a single antenna want to exchange multiple unicast messages with other users in the network by sharing the relay equipped with multiple antennas to verify the intuition that the relay is useful in increasing DoF.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2013 journal article
Effects of channel aging in massive MIMO systems
Journal of Communications and Networks, 15(4), 338–351.
author keywords: Channel aging; channel prediction; large-scale antenna systems; massive multi-input multi-output (MIMO); outdated channel state information (CSI)
TL;DR:
Numerical results in a multiceli network show that massive MIMO works even with some channel variation and that channel prediction could partially overcome channel aging effects.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2013 journal article
Fundamental limits of cooperation
IEEE Transactions on Information Theory, 59(9), 5213–5226.
Contributors: A. Lozano *, * & J. Andrews *
author keywords: Cooperative systems; interference; wireless communications; wireless networks
TL;DR:
It is concluded that cooperation cannot in general change an interference-limited network to a noise-limited one, and the spectral efficiency saturates at power levels of operational relevance.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
General chairs' welcome
2013 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2013 - Proceedings.
Contributors: R. Heath Jr. & A. Tewfik*
TL;DR:
The IEEE Global Conference on Signal and Information Processing (GlobalSIP) Organizing Committee would like to cordially welcome you to Austin, Texas, known as the Live Music Capital of the World.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
HF MIMO NVIS measurements with co-located dipoles for future tactical communications
Proceedings - IEEE Military Communications Conference MILCOM, 1250–1255.
Contributors: R. Daniels, S. Peters & R. Heath Jr.
TL;DR:
MIMO capabilities in near vertical incidence sky-wave (NVIS) propagation through a measurement campaign shows that MIMO is a game changer for HF NVIS with up to 2.27 times higher data rate, up to 9 times less transmit power, and more than 3 times fewer link failures.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Interference alignment - Recent results and future directions
IEEE Radio and Wireless Symposium, RWS, 205–207.
TL;DR:
A brief review of the concept of interference alignment, with a focus on linear precoding-based IA strategies for the multiple-input multiple-output (MIMO) interference channel, and surveys some of the authors' recent results on the subject.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
Interference coordination: Random clustering and adaptive limited feedback
IEEE Transactions on Signal Processing, 61(7), 1822–1834.
author keywords: Adaptive feedback bit partitioning; base stations; cellular networks; channel state information (CSI); clustering; clustering algorithms; interference cancellation; limited CSI feedback; MIMO; multicell coordination; stochastic geometry
TL;DR:
This paper model the base stations locations as a Poisson point process to provide a better analytical assessment of the performance of coordination and illustrates how this analysis can help solve network design problems such as identifying regions where coordination provides gains based on average cluster size, number of antennas, and number of feedback bits.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
Joint transmit precoding for the relay interference broadcast channel
IEEE Transactions on Vehicular Technology, 62(3), 1201–1215.
Contributors: K. Truong * & R. Heath Jr.
author keywords: Cooperative systems; distributed algorithms; interference channels; multiple-input multiple-output (MIMO); relay communication; relay interference broadcast channel; wireless communication
TL;DR:
An algorithm for designing the linear transmit precoders at the transmitters and relays of the relay interference broadcast channel, which is a generic model for relay-based cellular systems, to maximize the end-to-end sum rates is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Learning based link adaptation in multiuser MIMO-OFDM
European Signal Processing Conference. http://www.scopus.com/inward/record.url?eid=2-s2.0-84901343679&partnerID=MN8TOARS
Contributors: A. Rico-Alvarino & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2013 conference paper
Link adaptation in MIMO-OFDM with practical impairments
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1649–1653.
Contributors: A. Rico-Alvarino* & R. Heath Jr.
TL;DR:
Different FER prediction techniques are studied, which can be classified in parametric, non-parametric and semi- Parametric, and compare the achieved throughput when used in conjunction with link adaptation algorithms.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
Location-specific coverage in heterogeneous networks
IEEE Signal Processing Letters, 20(9), 873–876.
author keywords: Coverage probability; heterogeneous cellular networks; stochastic geometry; wireless communication
TL;DR:
Simulations show that the proposed closed-form approximation accurately characterizes the coverage probability at locations of interest inside the inscribing ball of a weighted Voronoi cell in heterogeneous networks.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
MIMO interference alignment in random access networks
IEEE Transactions on Communications, 61(12), 5042–5055.
Contributors: B. Nosrat-Makouei*, R. Ganti *, J. Andrews * & *
author keywords: Transmission capacity; interference channels; interference alignment; multiple-input multiple-output (MIMO); zero forcing; channel estimation; analog feedback; wireless networks; ad hoc networks
Source: ORCID
Added: September 11, 2020
2013 journal article
Modeling heterogeneous network interference using poisson point processes
IEEE Transactions on Signal Processing, 61(16), 4114–4126.
Contributors: R. Heath Jr., M. Kountouris * & T. Bai*
author keywords: Wireless communication; cellular networks; MIMO; stochastic geometry; interference
TL;DR:
This paper proposes to analyze downlink performance in a fixed-size cell, which is inscribed within a weighted Voronoi cell in a Poisson field of interferers, using recent applications of stochastic geometry to analyze cellular systems.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Multi-user real-time wireless video with perceptual constraints
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1183–1187.
Contributors: A. Thornburg*, A. Bovik * & R. Heath Jr.
TL;DR:
The role of perceptual quality constraints on video-based NoS is investigated and an algorithm to determine the feasible set of nodes and optimal packet schedule via a Markov decision process, given their perceptual constraints and channel qualities is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
Multicell cooperative systems with multiple receive antennas
IEEE Wireless Communications, 20(1), 50–58.
Contributors: I. Hwang *, C. Chae *, J. Lee * & *
TL;DR:
The role of the receive antennas in a multicell environment is discussed, and recently proposed multiceLL cooperative algorithms and receive antenna techniques for different interference statistics are reviewed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Multimode precoding in millimeter wave MIMO transmitters with multiple antenna sub-arrays
GLOBECOM - IEEE Global Telecommunications Conference, 3476–3480.
TL;DR:
An iterative precoding algorithm for a practical mmWave transmitter architecture in which all precoding is done in the analog domain is proposed, and the algorithm allows the mmWave system to adapt the rank of its transmission in response to varying propagation conditions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Precision limits of low-energy GNSS receivers
26th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2013, 4, 2828–2834. http://www.scopus.com/inward/record.url?eid=2-s2.0-84898958688&partnerID=MN8TOARS
Contributors: K. Pesyna Jr., R. Heath Jr. & T. Humphreys
Source: ORCID
Added: September 11, 2020
2013 journal article
Predictive vector quantization for multicell cooperation with delayed limited feedback
IEEE Transactions on Wireless Communications, 12(6), 2588–2597.
author keywords: Limited feedback; multicell coordination; predictive quantization; MIMO; Base stations; cellular networks; channel state information
TL;DR:
Simulations show that the proposed PVQ framework yields higher sum-rates than memoryless quantization approaches for multicell limited feedback, in a cooperative system using intercell interference nulling.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
Single-user MIMO versus multi-user MIMO in distributed antenna systems with limited feedback
Eurasip Journal on Advances in Signal Processing, 2013(1).
Contributors: S. Schwarz, R. Heath Jr. & M. Rupp
author keywords: Distributed antenna systems; Remote radio units; Channel state information estimation; Limited feedback communication; Quantized feedback; Single-user MIMO; Multi-user MIMO; LTE
TL;DR:
It is shown that significant gains in the CSI quantization accuracy and in the throughput of especially MU-MIMO systems can be achieved with relatively simple quantization codebook constructions that exploit the available temporal correlation and channel gain differences.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 journal article
The practical challenges of interference alignment
IEEE Wireless Communications, 20(1), 35–42.
TL;DR:
An overview of the concept of interference alignment as well as an assessment of practical issues including performance in realistic propagation environments, the role of channel state information at the transmitter, and the practicality of interference aligning in large networks are provided.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2013 conference paper
The viability of distributed antennas for massive MIMO systems
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1318–1323.
Contributors: K. Truong & R. Heath Jr.
TL;DR:
Both maximal ratio combining (MRC) and minimum mean squared error (MMSE) beamforming are found to provide higher performance in several distributed settings and an algorithm for remote radio head selection is proposed that allows MRC to approach the performance achieved by the MMSE beamforming solution yet retaining its lower complexity.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2013 conference paper
Video quality-maximizing resource allocation and scheduling with statistical delay guarantees
GLOBECOM - IEEE Global Telecommunications Conference, 1736–1740.
Contributors: A. Khalek*, C. Caramanis* & R. Heath Jr.
TL;DR:
This paper proposes providing statistical delay guarantees using the concept of effective capacity, and shows that QoS-aware scheduling and resource allocation enable supporting significantly more users under the same resource constraints.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 journal article
A cross-layer design for perceptual optimization of H.264/SVC with unequal error protection
IEEE Journal on Selected Areas in Communications, 30(7), 1157–1171.
Contributors: A. Khalek*, C. Caramanis* & R. Heath Jr.
author keywords: Scalable video coding (SVC); unequal error protection (UEP); cross-layer design; link adaptation; QoS-to-QoE mapping
TL;DR:
This work introduces an APP/MAC/PHY cross-layer architecture that enables optimizing perceptual quality for delay-constrained scalable video transmission and proposes an online QoS-to-QoE mapping technique to quantify the loss visibility of packets from each video layer according to packet loss visibility.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 conference paper
CSI feedback delay and degrees of freedom gain trade-off for the MISO interference channel
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1851–1854.
Contributors: N. Lee * & *
TL;DR:
A CSI feedback delay-DoF gain trade-off is characterized for the MISO interference by using space-time interference alignment that exploits current and outdated CSI jointly.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Coverage and capacity in mmWave cellular systems
Conference Record - Asilomar Conference on Signals, Systems and Computers, 688–692.
TL;DR:
It is shown that coverage in mmWave systems can rival or even exceed coverage in microwave systems assuming that the link budgets promised by existing mmWave system designs are in fact achieved and this comparable coverage translates into a superior average rate performance for mmWave Systems as a result of the larger bandwidth available for transmission.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Data sharing coordination and blind interference alignment for cellular networks
GLOBECOM - IEEE Global Telecommunications Conference, 4273–4277.
Contributors: S. Akoum*, C. Chen, M. Debbah * & *
TL;DR:
A new cooperative BIA scheme is proposed that takes into account the users whose data is being shared between adjacent base stations, and derives the achievable sum rate with interference mitigation and compares it to achievable rates with the original BIA strategy.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 journal article
Grassmannian differential limited feedback for interference alignment
IEEE Transactions on Signal Processing, 60(12), 6481–6494.
author keywords: Channel state information (CSI); differential feedback; Grassmann manifold; interference alignment; interference cancellation; interference channels; limited feedback; multiple access interference; OFDM
TL;DR:
The main conclusions are that the proposed Grassmannian differential feedback strategy allows IA to perform well over a wide range of Doppler spreads, and to approach perfect CSI performance in slowly varying channels.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Implementation of a real-time wireless interference alignment network
Conference Record - Asilomar Conference on Signals, Systems and Computers, 104–108.
Contributors: J. Massey *, J. Starr*, S. Lee*, D. Lee *, A. Gerstlauer * & *
TL;DR:
Two testbeds that implement real-time Multiple-input multiple-output (MIMO) IA for a network with three 2-antenna user pairs using software defined radio techniques are described: a PC-based testbed for rapid prototyping of potential IA protocols and an embedded test bed for evaluating IA under real-world computational constraints.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 journal article
Interference alignment with analog channel state feedback
IEEE Transactions on Wireless Communications, 11(2), 626–636.
Contributors: O. Ayach* & R. Heath Jr.
author keywords: Interference alignment; interference channel; multiple antennas; MIMO; analog feedback; limited feedback
TL;DR:
It is shown that the full multiplexing gain observed with perfect channel knowledge is preserved by analog feedback and that the mean loss in sum rate is bounded by a constant when signal-to-noise ratio is comparable in both forward and feedback channels.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Interference alignment with limited feedback for two-cell interfering MIMO-MAC
Proceedings of the International Symposium on Wireless Communication Systems, 566–570.
Contributors: N. Lee *, W. Shin *, R. Heath Jr. & B. Clerckx *
TL;DR:
It is shown that in order to keep the same multiplexing gain with the case of perfect CSIT, the number of feedback bits per receiver should be increased linearly with the SNR in dB scale.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 journal article
Interference aware-coordinated beamforming in a multi-cell system
IEEE Transactions on Wireless Communications, 11(10), 3692–3703.
Contributors: C. Chae *, I. Hwang *, R. Heath Jr. & V. Tarokh *
author keywords: MIMO system; multiuser system; multi-cell system; interference alignment; interference suppression; coordinated beamforming
TL;DR:
Numerical results confirm that the proposed system with two transmit/receive antennas achieves the full degrees of freedom of the two-cell multiple-input multiple-output channel while showing a better sum rate performance than competitive solutions such as non-cooperative eigen-beamforming and interference nulling.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Interference leakage minimization for convolutive MIMO interference channels
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2829–2832.
Contributors: Ó. González *, C. Lameiro *, J. Vía*, I. Santamaria * & R. Heath Jr.
TL;DR:
It is shown in the paper that each step of the alternating minimization algorithm can be reformulated as a convex optimization problem in which the autocorrelation function of the precoders or decoders is obtained.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Interference-free relay transmission without CSI-S for the MIMO two-hop interference channel
2012 19th International Conference on Systems, Signals and Image Processing, IWSSIP 2012, 217–221. http://www.scopus.com/inward/record.url?eid=2-s2.0-84863895761&partnerID=MN8TOARS
Contributors: N. Lee & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2012 journal article
Introduction to the issue on signal processing in heterogeneous networks for future broadband wireless systems
IEEE Journal on Selected Topics in Signal Processing, 6(3), 213–215.
Contributors: R. Heath Jr., M. Debbah *, E. Larsson *, D. Kim *, H. Viswanathan & I. Güvenc
TL;DR:
The six papers in this special issue focus on signal processing in heterogeneous networks for future broadband wireless systems and how these systems will change over time.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 journal article
Link adaptation with position/motion information in vehicle-to-vehicle networks
IEEE Transactions on Wireless Communications, 11(2), 505–509.
Contributors: R. Daniels* & R. Heath Jr.
author keywords: Adaptive modulation and coding; GPS; link adaptation; PNT; vehicular communication; wireless fingerprinting
TL;DR:
It is shown, through the definition of new large-scale coherence expressions, that channel measurements render large- scale coherence as a function of time-change while the position/motion measurements render coherenceAs a functionof velocity-change.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Low complexity precoding for large millimeter wave MIMO systems
IEEE International Conference on Communications, 3724–3729.
TL;DR:
A precoding algorithm is developed that approximates the optimal unconstrained precoder using a low dimensional basis representation that can be efficiently implemented in RF hardware and allows mmWave systems to approach waterfilling capacity.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Modeling heterogeneous network interference
2012 Information Theory and Applications Workshop, ITA 2012 - Conference Proceedings, 17–22.
Contributors: R. Heath Jr. & M. Kountouris *
TL;DR:
The proposed model simplifies the simulation of cellular systems and may provide analytical insights for certain signaling strategies and the proposed model is based on a simplified interference model for heterogeneous network.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Multi-cell coordination: A stochastic geometry approach
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 16–20.
Contributors: S. Akoum* & R. Heath Jr.
TL;DR:
Numerical results show that the average achievable rate with interference coordination as well as the mean loss in rate with equal-bit partitioning increase with increasing average cluster size and increasing number of antennas at the transmitter.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 book
Multicell handoff in MIMO cellular systems
In Advances in Intelligent and Soft Computing (pp. 893–898).
Contributors: S. Cho *, J. Choi* & R. Heath Jr.
TL;DR:
The simulation results demonstrate that the multicell handoff provides an improvement of average throughput in the high spatial correlation case.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Multiuser MIMO in distributed antenna systems with limited feedback
2012 IEEE Globecom Workshops, GC Wkshps 2012, 546–551.
TL;DR:
This work demonstrates the viability of zero forcing multiuser MIMO DASs with perfect channel state information (CSI) at the transmitter (CSIT) in an LTE simulation framework and modify previously derived feedback algorithms to exploit the large scale fading differences inherently existing in Dass.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Not too delayed CSIT achieves the optimal degrees of freedom
2012 50th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2012, 1262–1269.
Contributors: N. Lee * & *
TL;DR:
A new transmission method called space-time interference alignment is proposed, which actively exploits both the current and past CSI, and shows that it is possible to achieve the optimal degrees of freedom (DoF) gain if the delay is less than a certain fraction of the channel coherence time.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2012 conference paper
On the limitations of cooperation in wireless networks
2012 Information Theory and Applications Workshop, ITA 2012 - Conference Proceedings, 123–130.
Contributors: A. Lozano *, J. Andrews * & *
TL;DR:
It is shown that even perfect cooperation cannot in general change an interference-limited network to a noise-limited one, and the existence of a spectral efficiency upper bound that does not grow with P is shown.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 journal article
On the overhead of interference alignment: Training, feedback, and cooperation
IEEE Transactions on Wireless Communications, 11(11), 4192–4203.
Contributors: O. El Ayach*, A. Lozano * & R. Heath Jr.
author keywords: MIMO; multiple access interference; interference channels; interference cancellation; interference alignment; channel estimation; channel state information (CSI); analog feedback
Source: ORCID
Added: September 11, 2020
2012 conference paper
Online learning for quality-driven unequal protection of scalable video
IEEE International Workshop on Machine Learning for Signal Processing, MLSP.
TL;DR:
The proposed online algorithm uses local linear regression to learn the mapping between packet losses from each scalable video layer and quality degradation without assuming an underlying statistical model, and provably guarantees an average target video quality level and converges rapidly to a stable solution.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Pre- and post-FFT interference leakage minimization for MIMO OFDM networks
Proceedings of the International Symposium on Wireless Communication Systems, 556–560.
Contributors: C. Lameiro *, Ó. González *, J. Vía*, I. Santamaría * & R. Heath Jr.
TL;DR:
This work designs pre-FFT precoders and decoders for single-beam MIMO IFCs for OFDM transmissions that mitigate the interference before synchronization takes place, and shows that the proposed scheme improves the system performance when STOs occur, in comparison with traditional post- FFT IA techniques.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Prioritized multimode precoding for joint minimization of source-channel video distortions
Conference Record - Asilomar Conference on Signals, Systems and Computers, 925–929.
TL;DR:
Results show that the proposed cross-layer design for quality-driven packet prioritization at the physical layer combined with source and link rate adaptation to jointly minimize the source and channel distortions enables composite video quality gains due to prioritized delivery and rate adaptation.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 journal article
Spatial interference cancellation for multiantenna mobile ad hoc networks
IEEE Transactions on Information Theory, 58(3), 1660–1676.
Contributors: K. Huang *, J. Andrews *, D. Guo *, R. Heath Jr. & R. Berry *
author keywords: Ad hoc networks; adaptive arrays; channel estimation; interference cancellation; multiple-input multiple-output (MIMO); Rayleigh channels
TL;DR:
Numerical results suggest that canceling merely one interferer by each node may increase the transmission capacity by an order of magnitude or more, even when the CSI is imperfect.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Spectral efficiency limits in pilot-assisted cooperative communications
IEEE International Symposium on Information Theory - Proceedings, 1132–1136.
Contributors: A. Lozano *, J. Andrews * & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2012 conference paper
The capacity optimality of beam steering in large millimeter wave MIMO systems
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 100–104.
Contributors: O. Ayach*, R. Heath Jr., S. Abu-Surra*, S. Rajagopal* & Z. Pi*
TL;DR:
This paper considers both beamforming and multi-stream precoding in single user systems with large mmWave antenna arrays at both transmitter and receiver and shows that the unconstrained capacity-achieving precoding solutions converge to simple beam steering solutions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2012 journal article
Transmission capacity of Ad-hoc networks with multiple antennas using transmit stream adaptation and interference cancellation
IEEE Transactions on Information Theory, 58(2), 780–792.
Contributors: R. Vaze * & R. Heath Jr.
author keywords: Ad hoc network; beamforming; multiple antennas; interference cancelation; spatial multiplexing; transmission capacity
TL;DR:
Using the obtained bounds, the optimal number of data streams to transmit, and the optimal SRDOF to use for interference cancellation are derived that provide the best scaling of the transmission capacity with the number of antennas.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 journal article
User arrival in MIMO interference alignment networks
IEEE Transactions on Wireless Communications, 11(2), 842–851.
Contributors: B. Nosrat-Makouei*, J. Andrews * & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2012 journal article
User partitioning for less overhead in MIMO interference channels
IEEE Transactions on Wireless Communications, 11(2), 592–603.
Contributors: S. Peters* & R. Heath Jr.
author keywords: MIMO; multiaccess communication; interference alignment; ad hoc networks; multiple access interference
TL;DR:
Simulations show that the proposed greedy methods switch from time-division to interference alignment as the coherence time of the channel increases, and have a small loss relative to optimal partitioning only at moderate coherence times.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Using random shape theory to model blockage in random cellular networks
2012 International Conference on Signal Processing and Communications, SPCOM 2012.
Contributors: T. Bai*, R. Vaze * & R. Heath Jr.
TL;DR:
A stochastic model is proposed to quantify blockages due to shadowing, using methods from random shape theory to illustrate coverage and connectivity as a function of the metrics of blockages, such as the density and the average size of buildings.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2012 conference paper
Video-aware MIMO precoding with packet prioritization and unequal modulation
European Signal Processing Conference, 1905–1909. http://www.scopus.com/inward/record.url?eid=2-s2.0-84869779012&partnerID=MN8TOARS
Contributors: A. Khalek, C. Caramanis & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2011 conference paper
A machine learning approach to link adaptation for SC-FDE system
GLOBECOM - IEEE Global Telecommunications Conference.
Contributors: Z. Puljiz*, M. Park* & R. Heath Jr.
TL;DR:
A machine learning-based approach for link adaptation in bit interleaved convolutionally encoded SC-FDE systems is proposed, which reduces the feature space dimensionality consisting of the channel coefficients, noise variance, and post-processing SNR to improve performance in the presence of channel uncertainty.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
Adaptive bit partitioning for multicell intercell interference nulling with delayed limited feedback
IEEE Transactions on Signal Processing, 59(8), 3824–3836.
Contributors: R. Bhagavatula & R. Heath Jr.
author keywords: Adaptive feedback-bit partitioning; limited CSI feedback; multicell cooperation
TL;DR:
A new feedback- bit allocation strategy is proposed, as a function of the delays in the communication links and received signal strengths in the downlink, which yields higher sum-rates than the equal-bit allocation technique.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
Adaptive limited feedback for sum-rate maximizing beamforming in cooperative multicell systems
IEEE Transactions on Signal Processing, 59(2), 800–811.
Contributors: R. Bhagavatula* & R. Heath Jr.
author keywords: Base station cooperation; feedback-bit partitioning; limited feedback
TL;DR:
A new limited feedback strategy is proposed for multicell beamforming where cooperation is restricted to sharing only the CSI of active users among base stations, and a new feedback-bit allocation strategy, to partition the available bits between the desired and interfering channels, is developed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 conference paper
Adaptive policies for real-time video transmission: A Markov decision process framework
Proceedings - International Conference on Image Processing, ICIP, 2249–2252.
Contributors: C. Chen *, R. Heath Jr., A. Bovik * & G. De Veciana *
TL;DR:
It is proved that, under certain assumptions, adaptive video scheduling can be reduced to a Markov decision process over a finite state space and the scheduling policy can be optimized via standard stochastic control techniques using aMarkov decision formulation.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2011 journal article
Cognitive cooperation for the downlink of frequency reuse small cells
Eurasip Journal on Advances in Signal Processing, 2011.
Contributors: M. Zwingelstein-Colin*, S. Akoum*, * & M. Debbah *
TL;DR:
A cooperative diversity protocol coded over space, time, and frequency to achieve improved quality of service for mobile users in the downlink of small-cell frequency reuse networks and yields considerable improvement over direct transmission frequency reuse strategies.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
Cooperative algorithms for MIMO interference channels
IEEE Transactions on Vehicular Technology, 60(1), 206–218.
Contributors: S. Peters* & R. Heath Jr.
author keywords: Cooperative systems; distributed algorithms; interference channels; multiple-input-multiple-output (MIMO); wireless communication
TL;DR:
It is found that a network with cochannel interference can benefit from employing precoders that are designed to consider that interference, but in extreme cases, such as when only one receiver has a large amount of interference, ignoring that the co channel interference is advantageous.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2011 journal article
Decentralized precoding for multicell MIMO downlink
IEEE Transactions on Wireless Communications, 10(6), 1798–1809.
author keywords: Multicell; network MIMO; interference mitigation; decentralized precoder; inter-cell interference; dirty paper coding; CSI uncertainty
TL;DR:
This paper proposes distributed precoding techniques for the multicell MIMO downlink that are both decentralized with respect to the BSs as well as capable of enabling multiple users to share the same frequency carrier spatially within each cell.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 book
Digital Communication Basics
In Handbook of Computer Networks (Vol. 1, pp. 627–641).
Source: ORCID
Added: September 11, 2020
2011 journal article
Distributed link adaptation for multicast traffic in MIMO-OFDM systems
Physical Communication, 4(4), 286–295.
TL;DR:
A machine learning based distributed algorithm for link adaptation for multicast traffic in multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems is proposed and computations show that the data driven approach provides good prediction of the optimal modulation and coding scheme (MCS) outperforming the fixed MCS policies collectively.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 conference paper
Extending the reach of GPS-assisted femtocell synchronization and localization through Tightly-Coupled Opportunistic Navigation
2011 IEEE GLOBECOM Workshops, GC Wkshps 2011, 242–247.
Contributors: K. Pesyna*, K. Wesson*, R. Heath Jr. & T. Humphreys *
TL;DR:
The results of this paper suggest that a TCON solution fusing GPS with CDMA cellular signals offers significant sensitivity gains over state-of-the-art assisted-GPS receivers, allowing GPS-synchronized femtocells to be deployed in 90% of all residences.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 conference paper
Grassmannian differential limited feedback for interference alignment
European Signal Processing Conference, 1075–1079. http://www.scopus.com/inward/record.url?eid=2-s2.0-84863759064&partnerID=MN8TOARS
Contributors: O. El Ayach & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2011 conference paper
Grassmannian predictive coding for limited feedback multiuser MIMO systems
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3076–3079.
Contributors: T. Inoue * & R. Heath Jr.
TL;DR:
This work proposes Grassmannian predictive coding to exploit temporal channel correlation to reduce the feedback requirements in multiuser systems and shows that with practical feedback rates, a significant sum rate improvement can be obtained.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 conference paper
Impact of delayed limited feedback on the sum-rate of intercell interference nulling
IEEE International Conference on Communications.
Contributors: R. Bhagavatula* & R. Heath Jr.
TL;DR:
A feedback-bit allocation strategy is proposed for intercell interference nulling by taking into account the received signal strengths and delays in the feedback and backhaul links.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
Improved iterative coordinated beamforming based on singular value decomposition for multiuser mimo systems with limited feedforward
Journal of Applied Research and Technology, 9(3), 342–354. http://www.scopus.com/inward/record.url?eid=2-s2.0-84860827655&partnerID=MN8TOARS
Contributors: L. Soriano-Equigua, J. Sánchez-García, C. Chae & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2011 conference paper
Interference alignment for the multiple-antenna amplify-and-forward relay interference channel
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1288–1292.
Contributors: K. Truong * & R. Heath Jr.
TL;DR:
A relay-aided interference alignment algorithm for the multiple-antenna amplify-and-forward relay interference channel that relies on a connection between mean square error and achievable rate to solve the end-to-end sum-rate maximization problem.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 conference paper
Interference alignment with per-antenna power constraints
IEEE International Symposium on Information Theory - Proceedings, 2746–2750.
TL;DR:
This paper proposes and analyzes two algorithms for performing interference alignment with per-antenna equality and inequality power constraints and shows that incorporating equality constraints is more difficult and requires more antennas for interference alignment to be feasible, especially in the case of single-stream systems.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
Interference management schemes for the shared relay concept
Eurasip Journal on Advances in Signal Processing, 2011.
Contributors: A. Panah*, K. Truong *, S. Peters* & *
TL;DR:
Simulations show that strategies based on two-way shared relaying with bidirectional channel inversion at the relay often perform best in terms of total system throughput while one-way techniques are promising when the relay power is low.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
Is the PHY layer dead?
IEEE Communications Magazine, 49(4), 159–165.
Contributors: M. Dohler*, R. Heath Jr., A. Lozano *, C. Papadias * & R. Valenzuela
TL;DR:
This article identifies areas that are either under-developed or likely to be of impact in coming years - hence corroborating the relevance and importance of PHY research.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 conference paper
Joint source-channel adaptation for perceptually optimized scalable video transmission
GLOBECOM - IEEE Global Telecommunications Conference.
Contributors: A. Khalek*, C. Caramanis* & R. Heath Jr.
TL;DR:
An algorithm for perceptual quality optimization of scalable H.264 video with temporal and quality scalability is proposed that provides immunity against short term channel fluctuations, balances reliability and perceptual quality, reduces playback buffer starvation probability, and provides a convenient buffer management policy.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 conference paper
Jointly optimized two-cell MIMO systems
2011 IEEE GLOBECOM Workshops, GC Wkshps 2011, 421–425.
Contributors: C. Chae *, I. Hwang *, * & V. Tarokh *
TL;DR:
Jointly optimized interference aware coordinated beamforming algorithms for a two-cell system are investigated and it is confirmed that the proposed system shows better sum rate performance than competitive solutions such as non-cooperative eigen-beamforming and interference nulling.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 conference paper
MIMO interference alignment in random access networks
Conference Record - Asilomar Conference on Signals, Systems and Computers, 641–645.
Contributors: B. Nosrat-Makouei*, J. Andrews *, R. Heath Jr. & R. Ganti *
TL;DR:
This paper analyzes a multiple-input-multiple-output interference channel where nodes randomly distributed on a plane utilize interference alignment to reduce the point-to-point outage and model the spatial distribution of the nodes as a spatial Poisson cluster point process with equal sized clusters.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
MIMO interference alignment over correlated channels with imperfect CSI
IEEE Transactions on Signal Processing, 59(6), 2783–2794.
Contributors: B. Nosrat-Makouei*, J. Andrews * & *
author keywords: Algorithm design and analysis; beamforming; covariance matrix; equalizers; exponential distribution; interference alignment; interference channels; multiple-input multiple-output (MIMO); receivers; signal-to-noise ratio; wireless networks; Wishart distribution
TL;DR:
This paper provides an approximate closed-form signal-to-interference-plus-noise-ratio (SINR) expression for IA over multiple-input-multiple-output (MIMO) channels with imperfect channel state information and transmit antenna correlation and shows that IA may not be optimal for some performance criteria.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2011 journal article
MIMO transceiver designs for spatial sensing in cognitive radio networks
IEEE Transactions on Wireless Communications, 10(11), 3570–3576.
author keywords: MIMO; cognitive radios; spectrum sharing; projection matrix
TL;DR:
Numerical results confirm that the proposed joint design and the iterative algorithm show better achievable rate performance than the P-SVD technique at the expense, respectively, of CSI knowledge and side information.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
Multi-mode transmission for the MIMO broadcast channel with imperfect channel state information
IEEE Transactions on Communications, 59(3), 803–814.
Contributors: J. Zhang, M. Kountouris *, J. Andrews & R. Heath Jr.
author keywords: MIMO systems; space division multiplexing; broadcast channels; feedback; delay effects
TL;DR:
The proposed adaptive multi-mode transmission strategy to improve the spectral efficiency achieved in the multiple-input multiple-output (MIMO) broadcast channel with delayed and quantized channel state information provides performance close to that achieved by opportunistic scheduling with instantaneous feedback from a large number of users.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2011 journal article
Multimode transmission in network MIMO downlink with incomplete CSI
Eurasip Journal on Advances in Signal Processing, 2011.
Contributors: N. Seifi*, M. Viberg *, * , J. Zhang * & M. Coldrey *
TL;DR:
Simulation results demonstrate that the developed analytical framework provides a good approximation for a practical number of antennas and it is shown that the proposed scheduling algorithm performs closely to the opportunistic scheduling algorithm that requires instantaneous CSI feedback from all users.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
Multiuser MIMO in distributed antenna systems with out-of-cell interference
IEEE Transactions on Signal Processing, 59(10), 4885–4899.
TL;DR:
Several downlink multiuser multiple input multiple output (MIMO) DAS strategies are proposed and compared in terms of per-user throughput and area spectral efficiency and approximations of the ergodic rate are proposed to facilitate rapid simulation and design space exploration.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2011 journal article
Noniterative coordinated beamforming for multiuser MIMO systems with limited feedforward
IEEE Signal Processing Letters, 18(12), 701–704.
Contributors: L. Soriano-Equigua *, J. Sánchez-García*, J. Flores-Troncoso * & R. Heath Jr.
author keywords: Coordinated beamforming; feedforward; MU-MIMO; sum rate
TL;DR:
This letter proposes three methods to jointly calculate beamforming and combining vectors for the downlink of TDD multiuser multiple-input multiple-output systems, based on a perfect interference cancellation at the transmitter before calculating the quantized beamformers.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 conference paper
On imperfect CSI for the downlink of a two-tier network
IEEE International Symposium on Information Theory - Proceedings, 553–557.
Contributors: S. Akoum*, M. Kountouris * & *
TL;DR:
It is shown that transmit beamforming with imperfect CSI is a viable option for the downlink of a two-tier cellular network, and that rate backoff recovers the loss in rate due to packet outage.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
On the capacity and diversity-multiplexing tradeoff of the two-way relay channel
IEEE Transactions on Information Theory, 57(7), 4219–4234.
Contributors: R. Vaze * & *
author keywords: Capacity; distributed beamforming; diversity-multiplexing tradeoff; relay channel; two-way relay channel
TL;DR:
This paper considers a multiple input multiple output (MIMO) two-way relay channel, where each relay node has one or more antennas and a compress and forward strategy is proposed and its DM-tradeoff is derived.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 conference paper
Optimizing training and feedback for MIMO interference alignment
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1717–1721.
Contributors: O. El Ayach*, A. Lozano * & R. Heath Jr.
TL;DR:
This paper accurately characterize the effective sum rate with overhead in relation to various parameters such as signal-to-noise ratio and Doppler spread and shows that the overhead of IA can be optimized to ensure good performance in a wide range of fading scenarios.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
Overhead reduction in coordinated beamforming for multiuser MIMO-OFDM systems with limited feedforward
IEICE Transactions on Communications, E94-B(11), 3168–3171.
Contributors: L. Soriano-Equigua *, J. Sánchez-Garciá*, C. Chae * & R. Heath Jr.
author keywords: coordinated beamforming; MIMO-OFDM; feedforward overhead; subcarrier correlation
Source: ORCID
Added: September 11, 2020
2011 conference paper
Relay beamforming using interference pricing for the two-hop interference channel
GLOBECOM - IEEE Global Telecommunications Conference.
Contributors: K. Truong * & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2011 conference paper
Robust beamforming and power control for two-tier femtocell networks
IEEE Vehicular Technology Conference.
Contributors: R. Mo*, T. Quek* & R. Heath Jr.
TL;DR:
A two-tier network consisting of a macrocell and several closed-access femtocells sharing bandwidth with the macrocell is considered and a downlink power control and beamforming algorithm is proposed in a robust manner using robust optimization methodology.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2011 journal article
Signal processing for networking and communications
IEEE Signal Processing Magazine, 28(5), 151–152.
Contributors: S. Cui, * & G. Leus *
Source: ORCID
Added: September 11, 2020
2011 conference paper
Spatial interference mitigation for multiple input multiple output ad hoc networks: MISO gains
Conference Record - Asilomar Conference on Signals, Systems and Computers, 708–712.
Contributors: S. Akoum*, M. Kountouris *, M. Debbah * & R. Heath Jr.
TL;DR:
Numerical results show that the network throughput achieve by interference nulling at the transmitter is comparable to that achieved by interference cancellation at the receiver.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2011 journal article
Two-way transmission capacity of wireless Ad-hoc networks
IEEE Transactions on Wireless Communications, 10(6), 1966–1975.
Contributors: R. Vaze *, K. Truong *, S. Weber * & R. Heath Jr.
author keywords: Two-way communication; transmission capacity; feedback in ad-hoc networks
TL;DR:
A lower bound on the two-way transmission capacity with transmit beamforming using limited feedback is derived as a function of bandwidth and the number of bits allocated for feedback, which is shown to perform better than allocating bandwidth proportional to the desired rate in both directions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2011 conference paper
User admission in MIMO interference alignment networks
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3360–3363.
Contributors: B. Nosrat-Makouei*, J. Andrews * & R. Heath Jr.
TL;DR:
This paper considers an interference channel where a set of primary active users are cooperating through interference alignment over a constant multiple-input-multiple-output channel while aset of secondary users desire access to the channel.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 article
60 GHz wireless: Up close and personal
IEEE Microwave Magazine, Vol. 11.
Contributors: R. Daniels*, J. Murdock*, T. Rappaport * & R. Heath Jr.
author keywords: OFDM; Wireless communication; Dipole antennas; Phased arrays; Modulation; Frequency domain analysis
TL;DR:
Several ongoing challenges are surveyed, including the design of cost-efficient and low-loss on-chip and in-package antennas and antenna arrays, the characterization of CMOS processes at millimeter-wave frequencies, the discovery of efficient modulation techniques that are suitable for the unique hardware impairments and frequency selective channel characteristics at millimeters-wavefrequency.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 journal article
A new double-directional channel model including antenna patterns, array orientation, and depolarization
IEEE Transactions on Vehicular Technology, 59(5), 2219–2231.
Contributors: R. Bhagavatula*, C. Oestges * & *
author keywords: Antenna diversity; channel depolarization; mobile orientation; multiple-input-multiple-output (MIMO) channel modeling
TL;DR:
A double-directional MIMO channel model that accounts for important propagation effects like scattering, clustering, and channel depolarization and antenna effects like antenna diversity, cross polarization, and random array orientation, while still retaining an intuitive representation is developed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 conference paper
A simple SINR characterization for linear interference alignment over uncertain MIMO channels
IEEE International Symposium on Information Theory - Proceedings, 2288–2292.
Contributors: B. Nosrat-Makouei*, J. Andrews * & R. Heath Jr.
TL;DR:
It is shown that random matrix theory can be successfully applied to find the SINR distribution of each stream for each user with channel uncertainty, which allows easy calculation of useful performance metrics like symbol error-rate and achievable sum rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 journal article
Adaptation in convolutionally coded MIMO-OFDM wireless systems through supervised learning and SNR ordering
IEEE Transactions on Vehicular Technology, 59(1), 114–126.
TL;DR:
A new machine-learning framework is proposed that exploits past observations of the error rate and the associated channel-state information to predict the best modulation order and coding rate for new realizations of the channel state without modeling the input-output relationship of the wireless transceiver.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 journal article
Adaptive MIMO transmission techniques for broadband wireless communication systems
IEEE Communications Magazine, 48(5), 112–118.
Contributors: C. Chae *, A. Forenza, R. Heath Jr., M. McKay * & I. Collings *
author keywords: MIMO; Wireless communication; Signal to noise ratio; Switches; Phase shift keying; Encoding
TL;DR:
A recently proposed framework for adaptive MIMO architectures is reviewed and it is shown how to use this framework to reduce adaptive control overhead and practical implementation issues are discussed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Adaptive transmit antenna selection in mimo amplify-and-forward relay channels
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3022–3025.
Contributors: K. Truong * & R. Heath Jr.
author keywords: MIMO relay; antenna selection; amplify-and-forward; multi-antenna relay
TL;DR:
Algorithms for selecting dynamically the number of data streams and the transmit antenna subsets at both the source and relay to minimize the vector symbol error rate at a fixed overall rate are developed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 journal article
An energy-based comparison of long-hop and short-hop routing in MIMO networks
IEEE Transactions on Vehicular Technology, 59(1), 394–405.
Contributors: C. Lo*, S. Vishwanath * & *
author keywords: Large-antenna limits; multiple antennas; random networks; relays
TL;DR:
A numerical analysis indicates that, given loose outage constraints, only a small number of transmit antennas are needed for short-hop routing to have its maximum advantage over long-Hop routing, while given stringent outage constraint, the advantage of short- Hop routing always increases with additional transmit antennas.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Augmenting commercial wireless transceivers with time-of-arrival positioning
Record - IEEE PLANS, Position Location and Navigation Symposium, 982–987.
Contributors: R. Daniels*, S. Peters* & R. Heath Jr.
TL;DR:
This paper proposes the augmentation of IEEE 802.11 commercial hardware with time-of-arrival (ToA) estimation through an add-on hardware module and demonstrates the efficacy of this module to provide high-precision, low-cost positioning without the addition of significant system infrastructure.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Cognitive cooperation for the downlink of frequency reuse small cells
2010 2nd International Workshop on Cognitive Information Processing, CIP2010, 111–115.
Contributors: S. Akoum, M. Zwingelstein-Colin, R. Heath Jr. & M. Debbah
Source: ORCID
Added: September 11, 2020
2010 conference paper
Coordinated single-cell vs multi-cell transmission with limited-capacity backhaul
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1217–1221.
Contributors: N. Seifi*, M. Viberg *, R. Heath Jr., J. Zhang * & M. Coldrey *
TL;DR:
Contrary to the common belief, it is shown that coordination strategies with no data and only limited CSI sharing is preferred to those with full data and CSI sharing when the backhaul capacity is relatively low and the edge SNR is high.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Grassmannian predictive frequency domain compression for limited feedback beamforming
2010 Information Theory and Applications Workshop, ITA 2010 - Conference Proceedings, 173–177.
Contributors: T. Inoue * & R. Heath Jr.
TL;DR:
A new frequency domain compression technique is proposed to use predictive coding on the Grassmann manifold, exploiting the correlation between adjacent subcarriers, to obtain high resolution channel state information.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 journal article
Impact of mutual coupling on adaptive switching between MIMO transmission strategies and antenna configurations
Wireless Personal Communications, 52(1), 69–87.
Contributors: R. Bhagavatula*, R. Heath Jr., A. Forenza, N. Kirsch * & K. Dandekar *
author keywords: MIMO; Adaptive switching; Reconfigurable antenna arrays; Mutual coupling
TL;DR:
It is shown that the accuracy of switching point estimates for switching between statistical beamforming and spatial multiplexing is improved by taking into account the effects of mutual coupling between antenna array elements.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Interference alignment with analog CSI feedback
Proceedings - IEEE Military Communications Conference MILCOM, 1644–1648.
Contributors: O. El Ayach* & R. Heath Jr.
TL;DR:
This paper shows that the maximum degrees of freedom of the K-user interference channel are preserved with the suggested feedback strategy, and that the mean loss in sum rate incurred by imperfect CSI is bounded by a constant provided that the signal-to-noise ratio is comparable in both forward and reverse channels.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Limited feedback beamforming for temporally correlated MIMO channels with other cell interference
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3054–3057.
Contributors: S. Akoum* & R. Heath Jr.
author keywords: Limited feedback beamforming; MIMO systems; Markov model; other cell interference
TL;DR:
The degradation in throughput due to uncoordinated other cell interference and delay on the feedback channel is established and it is shown that the throughput gain of cell edge users decays doubly exponentially as the delay increases.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 journal article
Limited feedback for temporally correlated MIMO channels with other cell interference
IEEE Transactions on Signal Processing, 58(10), 5219–5232.
Contributors: S. Akoum* & R. Heath Jr.
author keywords: Cellular systems; feedback delay; goodput; imperfect CSI; limited feedback precoding; multiple-input-multiple-output (MIMO); other-cell interference; rate outage; temporally correlated channels
TL;DR:
This paper establishes the degradation in sum rate of users in a cellular system, due to uncoordinated other cell interference and feedback delay, and shows that the goodput gained from having delayed limited feedback decreases doubly exponentially as the delay increases.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Limited feedback with joint CSI quantization for multicell cooperative generalized eigenvector beamforming
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2838–2841.
Contributors: R. Bhagavatula*, R. Heath Jr. & B. Rao *
author keywords: Cooperative systems; Array signal processing; Limited feedback; Channel state information; Joint quantization
TL;DR:
A selection criterion is developed for random vector quantization (RVQ) to show that joint quantization with RVQ yields higher sum-rates than those obtained using separate codebooks.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Link adaptation in MIMO-OFDM with non-uniform constellation selection over spatial streams through supervised learning
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3314–3317.
Contributors: R. Daniels* & R. Heath Jr.
author keywords: MIMO-OFDM; link adaptation; supervised learning; non-uniform spatial streams; IEEE 802.11n
TL;DR:
This paper develops supervised learning algorithms that select from non-uniform rates per stream which reduces the complexity below the original supervised learning algorithm with uniform spatial streams and shows that the performance loss of decoupled link adaptation is reduced in systems with non- uniform constellations per spatial stream.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 journal article
MIMO two-way amplify-and-forward relaying with imperfect receiver CSI
IEEE Transactions on Vehicular Technology, 59(9), 4377–4387.
author keywords: Channel estimation; multiple-input-multiple-output (MIMO) communications; sum-rate; two-way relaying
TL;DR:
It is shown that Orthogonal pilots, i.e., pilot sequences that are orthogonal over the antenna arrays and the communicating terminals, minimize the composite and individual mean square errors in channel estimation error.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Maximum sum-rate interference alignment algorithms for MIMO channels
GLOBECOM - IEEE Global Telecommunications Conference.
Contributors: I. Santamaria *, O. Gonzalez *, R. Heath Jr. & S. Peters*
TL;DR:
A new iterative algorithm that aims at finding the IA solution that maximizes the average sum-rate, and the step size of the gradient ascent algorithm is annealed to zero over the iterations in such a way that during the last iterations only the interference leakage is being minimized and a perfect alignment solution is finally reached.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 journal article
Multimode antenna selection for MIMO amplify-and-forward relay systems
IEEE Transactions on Signal Processing, 58(11), 5845–5859.
Contributors: K. Truong * & R. Heath Jr.
author keywords: Adaptive antenna selection; amplify-and-forward; MIMO relay channel; multimode antenna selection; mutiple-antenna relay; multiple-input multiple-output (MIMO); two-hop channel; nonregenerative
TL;DR:
This paper develops dualmode and multimode antenna selection algorithms to choose the mode that is most likely to deliver the lowest vector symbol error rate assuming the overall data rate is fixed and shows that the proposed algorithms usually select the best mode.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Multiuser MIMO in distributed antenna systems
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1202–1206.
Contributors: R. Heath Jr., T. Wu, Y. Kwon * & A. Soong*
TL;DR:
To facilitate rapid simulation and design space exploration, approximations of the ergodic rate are proposed for each technique assuming path-loss, small-scale Rayleigh fading, and out-of-cell interference.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Online adaptive modulation and coding with support vector machines
2010 European Wireless Conference, EW 2010, 718–724.
Contributors: R. Daniels* & R. Heath Jr.
TL;DR:
A novel online support vector machine algorithm, compatible with accurate multidimensional link quality metrics, that is able to optimize AMC to the unique (potentially dynamic) hardware characteristics of each wireless device in selective channels is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 journal article
Opportunistic scheduling in multiuser OFDM systems with clustered feedback
Wireless Personal Communications, 52(1), 209–225.
author keywords: OFDMA; Scheduling; Limited feedback
TL;DR:
A random access based feedback protocol for multiuser orthogonal frequency division multiple access (OFDMA) systems with clustered feedback, where users are assigned to clusters of subcarriers based on the feedback of channel state information to the base station.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Predictive limited feedback for cooperative transmission
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1237–1241.
Contributors: R. Bhagavatula* & R. Heath Jr.
TL;DR:
A novel technique is proposed using predictive vector quantization to reduce feedback requirements associated with multicell systems by exploiting temporal correlation in channels and an approach to further reduce feedback overhead by transmitting back only the normalized vector directions is presented.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Sum-rate of mimo two-way relaying with imperfect CSI
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3418–3421.
Contributors: A. Panah* & R. Heath Jr.
author keywords: Multiple-input multiple-output (MIMO); channel estimation; amplify-and-forward relay
TL;DR:
A linear minimum mean-square estimator is used for estimating the composite channel at each communicating terminal and by using the notion of “worst-case noise” the lower-bounds for the transmission sum-rate in both directions of the established bi-directional relay link are derived.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2010 journal article
The feasibility of interference alignment over measured MIMO-OFDM channels
IEEE Transactions on Vehicular Technology, 59(9), 4309–4321.
author keywords: Channel measurements; interference alignment (IA); multiple-input-multiple-output (MIMO); software-defined radio
TL;DR:
This paper presents the first experimental study of IA in measured multiple-input-multiple-output orthogonal frequency-division-multiplexing (MIMO-OFDM) interference channels and shows that IA achieves the claimed scaling factors, or degrees of freedom, in several measured channel settings for a three-user two-antenna-per-node setup.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2010 conference paper
Two-way transmission capacity of wireless ad-hoc networks
IEEE International Symposium on Information Theory - Proceedings, 1688–1692.
Contributors: R. Vaze *, K. Truong *, R. Heath Jr. & S. Weber *
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2010 journal article
Unequal power allocation for JPEG transmission over MIMO systems
IEEE Transactions on Image Processing, 19(2), 410–421.
Contributors: M. Sabir, A. Bovik * & R. Heath Jr.
author keywords: Distortion model; joint source-channel coding; JPEG; multiple-input multiple-output systems; unequal error protection; unequal power allocation
TL;DR:
An unequal power allocation scheme for transmission of JPEG compressed images over multiple-input multiple-output systems employing spatial multiplexing provides significant image quality improvement as compared to different equal power allocations schemes.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
A cross-layer approach to energy efficiency for adaptive MIMO systems exploiting spare capacity
IEEE Transactions on Wireless Communications, 8(8), 4264–4275.
Contributors: H. Kim, C. Chae *, G. De Veciana & R. Heath Jr.
author keywords: MIMO; energy conservation; spare capacity; adaptive switching; cross-layer design
TL;DR:
This paper proposes an adaptive mode switching algorithm combined with rate selection to maintain a user's target throughput while achieving energy efficiency and shows that there exists a crossover point on the transmission rate below which SIMO consumes less power than MIMO when circuit power is included.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Achievable throughput of multi-mode multiuser MIMO with imperfect CSI constraints
IEEE International Symposium on Information Theory - Proceedings, 2659–2663.
Contributors: J. Zhang *, M. Kountouris *, J. Andrews * & R. Heath Jr.
TL;DR:
It is shown that not all possible users should be supported with spatial division multiplexing due to the residual inter-user interference caused by imperfect CSIT, and a multi-mode transmission strategy is proposed to maximize the throughput.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Adaptive mode switching in correlated multiple antenna cellular networks
Journal of Communications and Networks, 11(3), 279–286. http://www.scopus.com/inward/record.url?eid=2-s2.0-68149092614&partnerID=MN8TOARS
Contributors: C. Lee, C. Chae, S. Vishwanath & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2009 conference paper
An experimental evaluation of rate adaptation for multi-antenna systems
Proceedings - IEEE INFOCOM, 2313–2321.
Contributors: W. Kim *, O. Khan *, K. Truong *, S. Choi *, R. Grant*, H. Wright*, K. Mandke*, R. Daniels*, R. Heath Jr., S. Nettles*
TL;DR:
This work presents the first experimental study of adaptation between single and multiple spatial streams for 802.11n style systems and studies rate adaptation algorithms using both explicit and implicit feedback from the receiver.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
An online learning framework for link adaptation in wireless networks
Information Theory and Applications Workshop, ITA 2009, 138–140.
Contributors: R. Daniels* & R. Heath Jr.
TL;DR:
This paper summarizes an online machine learning approach to parameter selection through the real-time capturing of performance related data and a modified version of k-nearest neighbor is developed to enable both thereal-time capture of training data and the performance criterion for physical layer adaptation.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Block diagonalization in the MIMO broadcast channel with delayed CSIT
GLOBECOM - IEEE Global Telecommunications Conference.
Contributors: J. Zhang *, J. Andrews * & R. Heath Jr.
TL;DR:
An upper bound for the achievable throughput is provided, which shows that BD is more robust to imperfect CSIT than zeroforcing precoding as it has fewer inter-user interfering streams.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
End-to-End joint antenna selection strategy and distributed compress and forward strategy for relay channels
Eurasip Journal on Wireless Communications and Networking, 2009.
Contributors: R. Vaze * & *
TL;DR:
The proposed end-to-end antenna selection (EEAS) strategy achieves the corner points of the optimal diversity-multiplexing tradeoff and achieves better diversity gain at intermediate values of multiplexing gain, versus the best-known distributed space-time coding strategies.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Frequency-domain channel estimation and equalization for continuous-phase modulations with superimposed pilot sequences
IEEE Transactions on Vehicular Technology, 58(9), 4903–4908.
Contributors: C. Park *, R. Heathjr. Jr. & T. Rappaport *
author keywords: Block transmission; continuous-phase modulation (CPM); frequency-domain channel estimation and equalization; superimposed pilot-assisted transmission
TL;DR:
This paper proposes a new frequency-domain channel-estimation and equalization method for continuous-phase modulation block transmissions with superimposed pilot signals that provides spectral and power-efficient broadband CPM wireless communications with less complexity than previous methods.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Geodesic prediction for limited feedback multiuser MIMO systems in temporally correlated channels
RWS 2009 IEEE Radio and Wireless Symposium, Proceedings, 167–170.
Contributors: T. Inoue * & R. Heath Jr.
TL;DR:
A geodesic prediction algorithm is proposed to reduce the feedback overhead under temporally correlated channels, and improve on the sum rate ceiling observed with a fixed codebook size.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Grassmannian predictive coding for delayed limited feedback MIMO systems
2009 47th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2009, 783–788.
Contributors: T. Inoue * & R. Heath Jr.
author keywords: Prediction methods; correlation; feedback communication; MIMO systems; quantization; vector quantization
TL;DR:
A Grassmannian prediction and predictive coding framework for delayed feedback systems by exploiting the memory in the channel and a prediction step size optimization criterion for correlated time-series evolving on the Grassmann manifold is derived.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Interference alignment via alternating minimization
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2445–2448.
Contributors: S. Peters* & R. Heath Jr.
author keywords: MIMO systems; Interference; Radio communication; Multiuser channels; Optimization methods
TL;DR:
The algorithm is an alternating minimization over the precoding matrices at the transmitters and the interference subspaces at the receivers, and is proven to converge.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2009 journal article
Joint source-channel distortion modeling for MPEG-4 video
IEEE Transactions on Image Processing, 18(1), 90–105.
Contributors: M. Sabir, R. Heath Jr. & A. Bovik *
author keywords: Distortion modeling; joint source-channel coding; MPEG-4; quality assessment; video communication
MeSH headings : Algorithms; Computer Simulation; Data Compression / methods; Image Enhancement / methods; Image Interpretation, Computer-Assisted / methods; Models, Statistical; Reproducibility of Results; Sensitivity and Specificity; Signal Processing, Computer-Assisted; Video Recording / methods
TL;DR:
This model takes into account important aspects of video compression such as transform coding, motion compensation, and variable length coding and estimates distortion within 1.5 dB of actual simulation values in terms of peak-signal-to-noise ratio.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Kerdock codes for limited feedback precoded MIMO systems
IEEE Transactions on Signal Processing, 57(9), 3711–3716.
Contributors: T. Inoue * & R. Heath Jr.
author keywords: Array signal processing; codes; feedback communication; MIMO systems
TL;DR:
This correspondence derives the chordal distance for two and four antenna codebooks, showing that the proposed codebooks compare favorably with prior designs, and shows that quaternary alphabet facilitates efficient codebook storage and codeword search.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Limited feedback beamforming over temporally-correlated channels
IEEE Transactions on Signal Processing, 57(5), 1959–1975.
Contributors: K. Huang *, R. Heath Jr. & J. Andrews *
author keywords: Array signal processing; Doppler effect; feedback communication; Markov processes; time-varying channels; vector quantization
TL;DR:
Analytical results concerning CSI feedback are derived by modeling quantized CSI as a first-order finite-state Markov chain and feedback delay is proved to reduce the throughput gain due to CSI feedback at least exponentially.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Linear network coordinated beamforming for cell-boundary users
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 534–538.
TL;DR:
Low complexity linear network coordinated beamforming (N-CBF) algorithms under a zero inter-user interference constraint are proposed for the multi-cell downlink channel and approach the sum capacity realized by multi- cell dirty paper coding.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
MIMO spatial mode adaptation at the cell edge using interferer spatial correlation
IEEE Vehicular Technology Conference.
Contributors: R. Heath Jr., T. Wu * & A. Soong*
TL;DR:
A system and method is proposed for adapting the spatial transmission strategy in a cellular MIMO (multiple input multiple output) communication system for the downlink.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Message from the technical co-chairs
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC.
Source: ORCID
Added: September 11, 2020
2009 journal article
Mode switching for the multi-antenna broadcast channel based on delay and channel quantization
Eurasip Journal on Advances in Signal Processing, 2009.
Contributors: J. Zhang *, * , M. Kountouris * & J. Andrews *
TL;DR:
A mode switching algorithm is proposed, which switches between SU and MU-MIMO modes to improve the spectral efficiency based on average signal-to-noise ratio (SNR), normalized Doppler frequency, and the channel quantization codebook size.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2009 journal article
Multiuser MIMO transmission with limited feedback, cooperation, and coordination
Eurasip Journal on Advances in Signal Processing, 2009.
Contributors: M. Rupp *, A. Pérez-Neira *, R. Heath Jr., N. Jindal* & C. Mecklenbruker
Source: ORCID
Added: September 11, 2020
2009 journal article
Network coordinated beamforming for cell-boundary users: Linear and nonlinear approaches
IEEE Journal on Selected Topics in Signal Processing, 3(6), 1094–1105.
Contributors: C. Chae, S. Kim * & R. Heath Jr.
author keywords: Broadcast channel; coordinated beamforming; interference alignment; interference suppression; multi-input multi-output (MIMO) systems; multicast channel; multiuser system; vector perturbation
TL;DR:
Low complexity nonlinear N-CBF algorithms that avoid power enhancement and maximize the effective channel gain for enhancing the bit error rate (BER) and Monte Carlo simulations are carried out to verify the sum rate and BER performances of the proposed algorithms.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Networked MIMO with clustered linear precoding
IEEE Transactions on Wireless Communications, 8(4), 1910–1921.
Contributors: J. Zhang, R. Chen*, J. Andrews, A. Ghosh * & *
author keywords: MIMO systems; cellular technology; resource allocation and interference management; base station coordination
TL;DR:
Simulations show that the proposed coordination strategy efficiently reduces interference and provides a considerable sum rate gain for cellular MIMO networks.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
On the optimality of linear multiuser MIMO beamforming for a two-user two-input multiple-output broadcast system
IEEE Signal Processing Letters, 16(2), 117–120.
Contributors: C. Chae * & R. Heath Jr.
author keywords: Broadcast channel; coordinated beamforming; multiuser multiple-input multiple-output (MIMO) system; scaling law; zero-forcing
TL;DR:
It is shown that linear multiuser beamforming with many receive antennas can asymptotically achieve the sum capacity of the two-user i.i.d. MIMO broadcast channel even without opportunistic scheduling gain.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Optimal amplify and forward strategy for two-way relay channel with multiple relays
Proceedings - 2009 IEEE Information Theory Workshop on Networking and Information Theory, ITW 2009, 181–185.
Contributors: R. Vaze * & R. Heath Jr.
TL;DR:
An iterative algorithm is proposed to achieve the optimal rate region in a two-way relay channel, where two nodes want to exchange data with each other using multiple relays, and each relay employs an amplify and forward strategy.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Optimizing pilot locations using feedback in OFDM systems
IEEE Transactions on Vehicular Technology, 58(6), 2803–2814.
Contributors: A. Panah*, R. Vaughan * & R. Heath Jr.
author keywords: Feedback communications; least squares estimation; orthogonal frequency-division multiplexing (OFDM); pilot-symbol-aided modulation (PSAM)
TL;DR:
This paper examines closed-loop OFDM systems and shows how uniform pilots may no longer be optimal and proposes a feedback technique in which the pilot allocation mechanism is adapted to the mobile channel, and suggests the use of vector quantization in the context of the generalized Lloyd algorithm to reduce feedback.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Performance analysis of maximum ratio combining with imperfect channel estimation in the presence of cochannel interferences
IEEE Transactions on Wireless Communications, 8(3), 1080–1085.
Contributors: K. Ahn* & R. Heath Jr.
author keywords: Adaptive antenna array; channel estimation error; cochannel interference (CCI); maximum ratio combining (MRC); signal-to-interference-plus-noise ratio (SINR)
TL;DR:
This paper analyzes the performance of maximum ratio combining systems with imperfect channel estimation in the presence of cochannel interference with an arbitrary power interference-to-noise ratio with Simulation results demonstrate the accuracy of the theoretic analysis.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Performance of orthogonal beamforming for SDMA with limited feedback
IEEE Transactions on Vehicular Technology, 58(1), 152–164.
Contributors: K. Huang *, J. Andrews * & R. Heath Jr.
author keywords: Broadcast channels; feedback communication; multiuser channels; space division multiplexing
TL;DR:
Numerical results show that PU2RC achieves higher throughput and is more robust against CSI quantization errors than the popular alternative of zero-forcing beamforming if the number of users is sufficiently large, and the asymptotic throughput scaling laws forPU2RC with a large user pool are derived for different regimes of the signal-to-noise ratio (SNR).
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2009 journal article
Performance of vector perturbation multiuser MIMO systems with limited feedback
IEEE Transactions on Communications, 57(9), 2633–2644.
Contributors: D. Ryan*, I. Collings *, I. Clarkson* & R. Heath Jr.
author keywords: Vector perturbation; vector precoding; limited feedback; MIMO systems; multiuser; broadcast channel; wireless communications
TL;DR:
This paper considers the multiuser multiple-input multiple-output (MIMO) Rayleigh fading broadcast channel, and proposes a new practical low-complexity low-rate feedback scheme, showing that the performance approaches the ideal rate-distortion based scheme.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Progressive refinement of beamforming vectors for high-resolution limited feedback
Eurasip Journal on Advances in Signal Processing, 2009.
Contributors: R. Heath Jr., T. Wu * & A. Soong*
TL;DR:
This paper proposes to use a progressively scaled local codebook to enable high resolution quantization and reconstruction for multiuser MIMO with zero-forcing precoding and structure in the local codebooks is used to reduce search complexity in the progressive refinement algorithm.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Quantized antenna combining for multiuser MIMO-OFDM with limited feedback
IEEE Signal Processing Letters, 16(12), 1027–1030.
Contributors: J. Sánchez-García*, L. Soriano-Equigua * & R. Heath Jr.
author keywords: Antenna combining; limited feedback; MIMO-OFDM; multiuser communications; subcarrier grouping
TL;DR:
A method for reducing feedback in a downlink multiuser MIMO-OFDM cellular system, with zero forcing beamforming at the base and antenna combining at each mobile, with savings up to 93% in overhead bits for SNR equal to 15 dB.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Real world feasibility of interference alignment using mimo-ofdm channel measurements
Proceedings - IEEE Military Communications Conference MILCOM.
Contributors: O. Ayach*, S. Peters* & R. Heath Jr.
TL;DR:
This paper presents the first experimental study of IA in measured interference channel and shows that IA achieves the claimed scaling factors in a variety of measured channel settings for a 3 user, 2 antennas per node setup.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Relay architectures for 3GPP LTE-advanced
Eurasip Journal on Wireless Communications and Networking, 2009.
Contributors: S. Peters*, A. Panah*, K. Truong * & *
TL;DR:
Simulations with realistic channel models provide performance comparisons that reveal the importance of interference mitigation in multihop cellular networks.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Relay subset selection in wireless networks using partial decode-and-forward transmission
IEEE Transactions on Vehicular Technology, 58(2), 692–704.
Contributors: C. Lo*, S. Vishwanath * & R. Heath Jr.
author keywords: Greedy algorithms; partial decode-and-forward; relays; superposition coding
TL;DR:
This paper concludes by showing that the proposed proximity-based relay selection strategies yield near-optimal expected rates for a small number of selected relays.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2009 journal article
Relay-assisted user scheduling in wireless networks with hybrid ARQ
IEEE Transactions on Vehicular Technology, 58(9), 5284–5288.
Contributors: C. Lo*, J. Hasenbein*, S. Vishwanath * & R. Heath Jr.
author keywords: Hybrid automatic repeat request (HARQ); priority-index rules; relays; scheduling policies
TL;DR:
It is shown that a priority-index policy is optimal for a linear cost function with packets arriving according to a Poisson process and for an increasing convex cost function where packets must be drained from the queues at the base station.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
Single-user and multicast OFDM power loading with nonregenerative relaying
IEEE Transactions on Vehicular Technology, 58(9), 4890–4902.
author keywords: Multicast; nonregenerative relay; orthogonal frequency-division multiplexing (OFDM); power loading
TL;DR:
This paper derives power-loading strategies for single-user and multicast orthogonal frequency-division multiplexing (OFDM) wireless links in the presence of a nonregenerative relay node based on the minimization of the vector error rate at the destination subject to individual power constraints at the source and the relay.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Sum-rate maximizing beamforming in multicell systems with limited feedback
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1838–1842.
Contributors: R. Bhagavatula & R. Heath Jr.
TL;DR:
A more practical limited feedback scenario is considered for a recently proposed multicell beamforming approach that approximately maximizes the sum-rates in a two-cell two-user network.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
The Future of WiMAX: Multihop Relaying with IEEE 802.16j
IEEE Communications Magazine, 47(1), 104–111.
TL;DR:
An introduction to the upcoming IEEE 802.16j amendment is presented and insight is provided about the obstacles that practical system designers face when incorporating relaying into a wireless broadband network.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
The impact of channel feedback on opportunistic relay selection for hybrid-ARQ in wireless networks
IEEE Transactions on Vehicular Technology, 58(3), 1255–1268.
Contributors: C. Lo*, R. Heath Jr. & S. Vishwanath *
author keywords: Adaptive modulation; automatic repeat request (ARQ); convolutional codes; relays
TL;DR:
Simulations show that the throughput of the proposed relay selection strategy is comparable with that yielded by a centralized selection approach that relies on geographic information.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
The performance of space-time block codes from coordinate interleaved orthogonal designs over Nakagami-m fading channels
IEEE Transactions on Communications, 57(3), 653–664.
Contributors: H. Lee *, J. Andrews *, R. Heath Jr. & E. Powers*
author keywords: Space-time block codes (STBCs); coordinate interleaved orthogonal designs (CIODs); Nakagami-m fading; symbol-error rate; mutual information; outage capacity; information outage probability; asymptotic diversity order
TL;DR:
STBCs from CIODs are shown to provide full-diversity by deriving SER based and IOP-based asymptotic and instantaneous diversity orders and to derive accurate closed-form approximations for the information outage probability.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 journal article
To code in space and time or not in multihop relay channels
IEEE Transactions on Signal Processing, 57(7), 2736–2747.
Contributors: R. Vaze * & R. Heath Jr.
author keywords: Antenna selection; cooperative communication; diversity-multiplexing tradeoff; multihop relay channel
TL;DR:
To answer the question of whether to code in space and time or not in a multihop relay channel, end-to-end antenna selection strategy and distributed space-time coding is compared with respect to several important performance metrics such as encoding/decoding complexity, rate of transmission, latency, bit-error-rate performance, and resource requirements.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Transmission capacity of ad-hoc networks with multiple antennas using transmit stream adaptation and interference cancelation
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1709–1713.
Contributors: R. Vaze * & R. Heath Jr.
TL;DR:
Borders on the transmission capacity as a function of the number of antennas used for transmission, and the spatial receive degrees of freedom used for interference cancelation at the receiver are presented.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Transmission capacity of two-way communication in wireless ad hoc networks
IEEE International Conference on Communications.
Contributors: K. Truong *, S. Weber * & R. Heath Jr.
TL;DR:
An upper bound and an approximation are derived for the two-way transmission capacity in wireless ad hoc networks, which are shown to be relatively tight for small outage probability constraints.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2009 conference paper
Transmission capacity of wireless ad-hoc networks with multiple antennas using multi-mode precoding and interference cancelation
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 404–408.
Contributors: R. Vaze * & R. Heath Jr.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 journal article
A diversity guarantee and SNR performance for unitary limited feedback MIMO systems
Eurasip Journal on Advances in Signal Processing, 2008.
Contributors: B. Mondal* & R. Heath Jr.
TL;DR:
If the feedback per channel realization is greater than a threshold, then there is no loss of diversity due to quantization, and this result applies to both SM and STBC with unitary precoding and confirms some conjectures made about antenna subset selection with linear receivers.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
A lattice-theoretic analysis of vector perturbation for multi-user MIMO systems
IEEE International Conference on Communications, 3340–3344.
Contributors: D. Ryan*, I. Collings *, I. Clarkson* & R. Heath Jr.
TL;DR:
This paper provides a new lattice-theoretic approach to analyze a multi-user technique known as vector perturbation and derives a concise approximation to the signal-to-noise ratio (SNR) at the output of the demodulator.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 conference paper
A low complexity linear multiuser MIMO beamforming system with limited feedback
CISS 2008, The 42nd Annual Conference on Information Sciences and Systems, 418–422.
Contributors: C. Chae *, D. Mazzarese*, N. Jindal* & R. Heath Jr.
TL;DR:
A low complexity linear multiuser beamforming system for the multiple-input multiple-output (MIMO) broadcast channel is proposed via the generalized eigenvector decomposition to jointly optimize transmit beamforming and receive combining vectors.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
A new MIMO channel representation including spatial diversity, array orientation and depolarization effects
2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI.
Contributors: R. Bhagavatula*, R. Heath Jr. & C. Oestges *
TL;DR:
An analytical channel model that accounts for spatial, pattern, polarization diversities, channel depolarization, random mobile terminal orientations and mutual coupling effects is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
A space-time receiver with joint synchronization and interference cancellation in asynchronous MIMO-OFDM systems
IEEE Transactions on Vehicular Technology, 57(5), 2991–3005.
author keywords: asynchronous; frequency offset; interference; multiple-input-multiple-output (MIMO) systems; orthogonal frequency-division multiplexing (OFDM)
TL;DR:
This paper introduces a novel space-time equalization algorithm based on the channel state information that aims to null the cochannel interference and combat asynchronism, as well as minimize a lower bound to the symbol error rate in the asynchronous MIMO-OFDM system.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
A supervised learning approach to adaptation in practical MIMO-OFDM wireless systems
GLOBECOM - IEEE Global Telecommunications Conference, 4583–4587.
Contributors: R. Daniels*, C. Caramanis* & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2008 conference paper
Adaptive mode switching in the MIMO broadcast channel
2008 IEEE Radio and Wireless Symposium, RWS, 711–714.
Contributors: C. Lee, C. Chae, S. Vishwanath & R. Heath Jr.
author keywords: MIMO broadcast channels; partial channel state information; single user and multi-user transmissions
TL;DR:
This paper determines this mode switching point both analytically and numerically for a MIMO channel with transmit side correlation - when the number of users is below this point, single user transmission outperforms multi-user transmission, and the reverse is true when theNumber of users exceeds this critical value.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
An Overview of Limited Feedback in Wireless Communication Systems
IEEE Journal on Selected Areas in Communications, 26(8), 1341–1365.
author keywords: Wireless communications; Limited feedback; MIMO systems; Quantized precoding; Multiuser MIMO systems
TL;DR:
This tutorial provides a broad look at the field of limited feedback wireless communications, and reviews work in systems using various combinations of single antenna, multiple antenna, narrowband, broadband, single-user, and multiuser technology.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Block diagonalization for multi-user MIMO with other-cell interference
IEEE Transactions on Wireless Communications, 7(7), 2671–2681.
Contributors: S. Shim*, J. Kwak *, R. Heath Jr. & J. Andrews *
author keywords: MIMO systems; broadcast channels; spatial filtering; interference suppression
TL;DR:
An OCI-aware enhancement to block diagonalization that uses a whitening filter for interference suppression at the receiver and a novel precoder using the interference-plus-noise covariance matrix for each user at the transmitter is presented.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Block diagonalized vector perturbation for multiuser MIMO systems
IEEE Transactions on Wireless Communications, 7(11), 4051–4057.
Contributors: C. Chae *, S. Shim* & R. Heath Jr.
author keywords: MIMO systems; broadcast channels; nonlinear system; perturbation methods; spatial filtering; interference suppression
TL;DR:
A new multiuser MIMO algorithm that combines BD with vector perturbation (VP) is proposed that avoids the second training phase, reduces each user is receiver complexity thanks to pre-equalization with VP at the transmitter, and has comparable diversity performance to BD with maximum likelihood decoding algorithm.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Computing the receive spatial correlation for a multi-cluster MIMO channel using different array configurations
GLOBECOM - IEEE Global Telecommunications Conference, 3959–3963.
Contributors: R. Bhagavatula* & R. Heath Jr.
TL;DR:
Analytical expressions are derived for the spatial correlation between the received signals of a ULA and uniform circular array without making any of the above mentioned assumptions and it is shown that the derived expression evaluates spatial correlation more accurately than the existing models.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Constructing packings in grassmannian manifolds via alternating projection
Experimental Mathematics, 17(1), 9–35.
Contributors: I. Dhillon *, * , T. Strohmer* & J. Tropp *
author keywords: combinatorial optimization; packing; projective spaces; Grassmannian spaces; Tarnmes' problem
TL;DR:
The alternating projection method can be used to produce packings of subspaces in real and complex Grassmannian spaces equipped with the Fubini–Study distance and can prove that some of the novel configurations constructed by the algorithm have packing diameters that are nearly optimal.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Coordinated beamforming for the multiuser MIMO broadcast channel with limited feedforward
IEEE Transactions on Signal Processing, 56(12), 6044–6056.
Contributors: C. Chae, D. Mazzarese*, T. Inoue & R. Heath Jr.
author keywords: Broadcast channels; interference suppression; multiple-input multiple-output (MIMO) systems
TL;DR:
Simulations show that the sum rate of the proposed methods using Grassmannian codebooks is close to the sum capacity of the MIMO broadcast channel, especially in the high signal-to-noise ratio (SNR) regime.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 journal article
Coordinated beamforming with limited feedback in the MIMO broadcast channel
IEEE Journal on Selected Areas in Communications, 26(8), 1505–1515.
Contributors: C. Chae, D. Mazzarese*, N. Jindal* & R. Heath Jr.
TL;DR:
To enable practical implementation, a new limited feedback algorithm is proposed that exploits the structure of the algorithm to avoid full channel quantization and performs close to the sum capacity of the MIMO broadcast channel even with limited feedback.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Design and evaluation of a reconfigurable antenna array for MIMO systems
IEEE Transactions on Antennas and Propagation, 56(3), 869–881.
Contributors: D. Piazza*, N. Kirsch *, A. Forenza, * & K. Dandekar *
author keywords: antenna measurements; multiple input multiple output (MIMO) systems; reconfigurable antennas; spatial correlation
TL;DR:
New reconfigurable antenna array is demonstrated for multiple input multiple output (MIMO) communication systems that improves link capacity in closely spaced antenna arrays that includes a new definition of spatial correlation coefficient to include the effects of antenna mismatch and radiation efficiency when quantifying the benefit of pattern diversity.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 journal article
Design of linear equalizers optimized for the structural similarity index
IEEE Transactions on Image Processing, 17(6), 857–872.
Contributors: S. Channappayya *, A. Bovik *, C. Caramanis* & R. Heath Jr.
author keywords: equalizers; image restoration
MeSH headings : Algorithms; Computer Simulation; Image Enhancement / methods; Image Interpretation, Computer-Assisted / methods; Linear Models; Numerical Analysis, Computer-Assisted; Pattern Recognition, Automated / methods; Reproducibility of Results; Sensitivity and Specificity; Signal Processing, Computer-Assisted; Subtraction Technique
TL;DR:
It is demonstrated that designing image processing algorithms, and, in particular, denoising and restoration-type algorithms, can yield significant gains over existing algorithms by optimizing them for perceptual distortion measures, and these gains may be obtained without significant increase in the computational complexity of the algorithm.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
End-to-end antenna selection strategies for multi-hop relay channels
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1506–1510.
Contributors: R. Vaze * & R. Heath Jr.
TL;DR:
A multiple stream end-to-end antenna selection strategy for full-duplex multi-hop relay channel is proposed, where multiple data streams are transmitted simultaneously using multiple paths from the source to the destination.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Energy-efficient adaptive mimo systems leveraging dynamic spare capacity
CISS 2008, The 42nd Annual Conference on Information Sciences and Systems, 68–73.
Contributors: H. Kim, C. Chae, G. De Veciana & R. Heath Jr.
TL;DR:
Extensive flow-level simulations under dynamic loads and Rayleigh fading channels confirm that the proposed technique can save more than 50 % of the mobile terminals' transmission energy and enable an effective tradeoff between performance and energy conservation.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 journal article
Erratum: "SDMA with a sum feedback rate constraint" (IEEE Transactions on Signal Processing)
IEEE Transactions on Signal Processing, 56(8 I), 3800–3801.
Contributors: K. Huang *, R. Heath Jr. & J. Andrews *
TL;DR:
This correspondence corrects an error in the proof for theorem, the concavity of the logarithmic function was incorrectly applied to obtain the sum-rate lower bound even though it leads to an upper bound.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Guest editorial exploiting limited feedback in tomorrow's wireless communication networks
IEEE Journal on Selected Areas in Communications, 26(8), 1337–1340.
TL;DR:
Channel state information at the transmitter can be optimized to provide higher link capacity and throughput, more efficiently share the channel with multiple users, increase range by exploiting diversity due to spatial and frequency selectivity, and simplify multi-user receivers through known interference cancellation.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Information outage probability and diversity order of alamouti transmit diversity in time-selective fading channels
IEEE Transactions on Vehicular Technology, 57(6), 3890–3895.
Contributors: H. Lee *, R. Heath Jr. & E. Powers*
author keywords: Alamouti transmit diversity; asymptotic diversity order; information outage probability; mutual information; time-selective fading channel
TL;DR:
From the theoretical and simulation results, it is demonstrated that, when the channel is time selective, the asymptotic diversity orders for the four detectors approach two, zero, one, and one, respectively.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 book
Joint Detection for Multi-Antenna Channels
In Advances in Multiuser Detection (pp. 311–364).
Contributors: A. Tulino *, M. Mckay *, J. Andrews *, I. Collings * & *
TL;DR:
This research presents a new probabilistic approach to estimating the response of the immune system to laser-spot assisted, 3D image analysis that quantifies the importance of eye-tracking in the treatment of chronic pain.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Kerdock codes for limited feedback MIMO systems
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3113–3116.
Contributors: T. Inoue * & R. Heath Jr.
TL;DR:
This paper proposes a new codebook design based on Kerdock codes and mutually unbiased bases which enjoys performance similar to previously known codebooks and has systematic construction, reduced storage, and reduced online search computation.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
MIMO receiver design in the presence of radio frequency interference
GLOBECOM - IEEE Global Telecommunications Conference, 3340–3344.
Contributors: K. Gulati*, A. Chopra *, * , B. Evans *, K. Tinsley* & X. Lin*
TL;DR:
This paper considers the problem of receiver design for a two transmit, two receive antenna MIMO system in the presence of RFI, and shows significant improvement in symbol error rate performance of the proposed techniques over receivers designed assuming additive Gaussian noise.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
MIMO relaying with linear processing for multiuser transmission in fixed relay networks
IEEE Transactions on Signal Processing, 56(2), 727–738.
author keywords: broadcast channels (BC); multiple-input multiple-output (MIMO) systems; multiuser channels; relays
TL;DR:
These bounds are used to motivate an implementable multiuser precoding strategy that combines Tomlinson-Harashima precoding at the base station and linear signal processing at the relay, adaptive stream selection, and QAM modulation.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Machine learning for physical layer link adaptation in multiple-antenna wireless networks
Proceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM, 114–115.
Contributors: R. Daniels*, K. Mandke*, S. Peters*, S. Nettles* & R. Heath Jr.
TL;DR:
This implementation of physical layer link adaptation, or data rate selection, through machine learning on Hydra: an IEEE 802.11n draft standard multihop wireless networking prototype highlights both the utility of learning-based link adaptation in practical networks as well as the flexibility of Hydra.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Maximizing reliability in multi-hop wireless networks
IEEE International Symposium on Information Theory - Proceedings, 11–15.
TL;DR:
COSTBC is shown to achieve the maximum diversity gain in a multi-hop wireless network with flat Rayleigh fading channels and it is shown that COSTBC requires minimum decoding complexity thanks to the connection to orthogonal space-time block codes.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Multimode transmission for multiuser MIMO systems with block diagonalization
IEEE Transactions on Signal Processing, 56(7 II), 3294–3302.
Contributors: R. Chen*, Z. Shen *, J. Andrews * & R. Heath Jr.
author keywords: downlink; multiple-input-multiple-output (MIMO); multiuser; scheduling; sum capacity
TL;DR:
Two low-complexity near-optimal user/antenna selection algorithms are developed and demonstrate that the proposed algorithms achieve up to 98% of the sum throughput of the exhaustive search, for most system configurations, while the complexity is substantially reduced.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Multiuser MIMO downlink with limited feedback using transmit-beam matching
IEEE International Conference on Communications, 3506–3510.
TL;DR:
This paper introduces a new method to mitigate the interference: transmit-beam matching, using multiple receive antennas, which minimizes the interspatial stream interference by each user's effective channel to the transmit- beam.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Non-iterative multiuser MIMO coordinated beamforming with limited feedforward
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2393–2396.
Contributors: C. Chae, T. Inoue, R. Heath Jr. & D. Mazzarese*
author keywords: MIMO systems; multiuser channels; space division; multiplexing
TL;DR:
Simulations show that the proposed methods using quantized codebooks approach the sum capacity of the MIMO broadcast channel.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Non-redundant precoding-based blind and semi-blind channel estimation for MIMO block transmission with a cyclic prefix
IEEE Transactions on Signal Processing, 56(6), 2509–2523.
Contributors: C. Shin *, R. Heath Jr. & E. Powers*
author keywords: blind and semi-blind channel estimation; block transmission; cyclic prefix; multiple-input-multiple-output (MIMO); precoding
TL;DR:
This paper presents a framework for blind channel estimation based on a general non-redundant precoding that is robust against overestimates of a true MIMO channel order, and derives a simplified precoder that is optimized in the sense of minimizing the impact of unknown additive noise.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Nonregenerative MIMO relaying with optimal transmit antenna selection
IEEE Signal Processing Letters, 15, 421–424.
author keywords: antenna selection; cooperative systems; diversity methods; multiple-input multiple-output (MIMO) systems; relaying
TL;DR:
This work derives optimal SNR-based transmit antenna selection rules at the source and relay for the nonregenerative half-duplex MIMO relay channel and proposes methods for performing the necessary limited feedback.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Optimization methodology for designing 2-CPAs exploiting pattern diversity in clustered MIMO channels
IEEE Transactions on Communications, 56(10), 1748–1759.
author keywords: MIMO systems; antenna arrays; pattern diversity; microstrip antennas; spatially correlated channels
TL;DR:
This paper proposes a novel optimization methodology for designing circular patch arrays (CPAs), under a clustered MIMO channel model assumption, and finds that the single-cluster scenario can approximate CPA performance in clustered channels, reducing the number of channel scenarios that need to be considered.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Perceptual soft thresholding using the structural similarity index
Proceedings - International Conference on Image Processing, ICIP, 569–572.
Contributors: S. Channappayya *, A. Bovik * & R. Heath Jr.
author keywords: Image denoising
TL;DR:
The visual quality of the images denoised using the proposed algorithm is shown to be higher compared to the MSE-optimal soft thresholding denoising solution, as measured by the SSIM Index.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Progressive refinement for high resolution limited feedback multiuser MIMO beamforming
Conference Record - Asilomar Conference on Signals, Systems and Computers, 743–747.
Contributors: R. Heath Jr., T. Wu * & A. Soong*
TL;DR:
A progressive refinement concept that uses a base codebook quantization followed by a progressively scaled local codebook to enable high resolution quantization and reconstruction of channel state information in multiuser MIMO communication.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Rate bounds for MIMO relay channels
Journal of Communications and Networks, 10(2), 194–203. http://www.scopus.com/inward/record.url?eid=2-s2.0-47249142481&partnerID=MN8TOARS
Contributors: C. Lo, S. Vishwanath & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2008 conference paper
Rate bounds on SSIM index of quantized image DCT coefficients
Data Compression Conference Proceedings, 352–361.
Contributors: S. Channappayya *, A. Bovik *, R. Heath Jr. & C. Caramanis*
TL;DR:
Borders on the structural similarity (SSIM) index are derived as a function of quantization rate for fixed-rate uniform quantization of image discrete cosine transform (DCT) coefficients under the high rate assumption.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Rate bounds on SSIM index of quantized images
IEEE Transactions on Image Processing, 17(9), 1624–1639.
Contributors: S. Channappayya *, A. Bovik * & R. Heath Jr.
MeSH headings : Algorithms; Data Compression / methods; Image Enhancement / methods; Image Interpretation, Computer-Assisted / methods; Reproducibility of Results; Sensitivity and Specificity; Signal Processing, Computer-Assisted
TL;DR:
Borders on the structural similarity (SSIM) index are derived as a function of quantization rate for fixed-rate uniform quantization of image discrete cosine transform (DCT) coefficients under the high-rate assumption.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Relay subset selection in wireless networks using partial decode-and-forward transmission
IEEE Vehicular Technology Conference, 2395–2399.
Contributors: C. Lo*, S. Vishwanath * & R. Heath Jr.
TL;DR:
This paper considers the problem of selecting a set of relay nodes to assist a transmitting node in a two-hop wireless network and proposed proximity-based relay selection algorithms offer good performance in terms of the expected achieved rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Rethinking information theory for mobile ad hoc networks
IEEE Communications Magazine, 46(12), 94–101.
Contributors: J. Andrews *, S. Shakkottai *, * , N. Jindal*, M. Haenggi *, R. Berry *, D. Guo *, M. Neely *
TL;DR:
For a theory to truly characterize the limits of deployed MANETs it must overcome three key roadblocks, spatial and timescale decompositions have not yet been developed for optimally modeling the spatial and temporal dynamics of wireless networks.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 conference paper
SSIM-Optimal linear image restoration
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 765–768.
Contributors: S. Channappayya *, A. Bovik *, C. Caramanis* & R. Heath Jr.
author keywords: image restoration
TL;DR:
It is shown using these examples that optimizing equalizers for the SSIM index does indeed result in higher perceptual image quality compared to equalizers optimized for the ubiquitous mean squared error (MSE).
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 journal article
Shannon capacity and symbol error rate of space-time block codes in MIMO rayleigh channels with channel estimation error
IEEE Transactions on Wireless Communications, 7(1), 324–333.
Contributors: K. Ahn*, R. Heath Jr. & H. Baik*
author keywords: channel estimation error; multiple-input multiple-output (MIMO); Shannon capacity; space-time block coding (STBC); symbol error rate (SER)
TL;DR:
This paper analyzes the impact of channel estimation error on the ergodic capacity and symbol error rate (SER) for space-time block coded multiple-input multiple-output (MIMO) systems and derives a closed-form capacity expression over MIMO Rayleigh channels withChannel estimation error.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Single-user MIMO vs. multiuser MIMO in the broadcast channel with CSIT constraints
46th Annual Allerton Conference on Communication, Control, and Computing, 309–314.
Contributors: J. Zhang *, J. Andrews * & R. Heath Jr.
TL;DR:
Fundamental limits on adaptive multiple-input multiple-output (MIMO) transmission with imperfect channel state information at the transmitter (CSIT) are considered and it is shown that single-user MIMO is robust to imperfect CSIT while multiuser MIMo loses spatial multiplexing gain in proportion to delay and inverse with channel quantization codebook size.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Sizing up MIMO arrays
IEEE Vehicular Technology Magazine, 3(4), 31–38.
Contributors: R. Bhagavatula*, * , S. Vishwanath * & A. Forenza
TL;DR:
The proposed methodology by applying it to wireless deployment in aircraft, to reduce expenditure associated with the installation and maintenance of wires for seatback entertainment, can be easily supported by MIMO systems.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Space-time block codes with limited feedback using antenna grouping
IEICE Transactions on Communications, E91-B(10), 3387–3390.
Contributors: C. Chae *, S. Shim* & R. Heath Jr.
author keywords: space-time block code; full-diversity full-rate system; antenna selection; antenna grouping
TL;DR:
An antenna grouping method that improves the error rate performance of space-time codes in a wide range of mobility environments by requiring only two bits of feedback information to achieve better link performance and full rate for a certain four transmit antenna system.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Spatial interference cancelation for mobile Ad hoc networks: Imperfect CSI
Conference Record - Asilomar Conference on Signals, Systems and Computers, 131–135.
Contributors: K. Huang *, R. Heath Jr., J. Andrews *, D. Guo * & R. Berry *
TL;DR:
Simulation results show that spatial interference cancelation increases transmission capacity by an order of magnitude or more despite CSI inaccuracy, and increasing the length of training sequences with the inverse of the decreasing target outage probability achieves the same network-capacity scaling laws as for perfect CSI.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Spatial interference cancellation for mobile ad hoc networks: Perfect CSI
GLOBECOM - IEEE Global Telecommunications Conference, 666–670.
Contributors: K. Huang *, J. Andrews *, R. Heath Jr., D. Guo * & R. Berry *
TL;DR:
This paper focuses on spatial interference cancellation with perfect channel state information (CSI), and analyzes the corresponding network capacity, which is defined as the maximum transmitting node density under constraints on outage and the signal-to-interference-plus-noise ratio.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Switching between antenna selection and spatial multiplexing in the nonregenerative MIMO relay channel
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1469–1473.
Contributors: S. Peters* & R. Heath Jr.
TL;DR:
In this paper, the use of pre-existing adaptation techniques is shown to be inapplicable to the linear MIMO relay channel, motivating the derivation of new techniques.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Throughput/Delay measurements of limited feedback beamforming in indoor wireless networks
GLOBECOM - IEEE Global Telecommunications Conference, 4593–4598.
Contributors: R. Daniels*, K. Mandke*, K. Truong *, S. Nettles* & R. Heath Jr.
TL;DR:
This paper investigates the tradeoff between throughput and feedback delay of limited feedback beamforming in indoor wireless channels with a practical MIMO-OFDM prototype and evaluates the performance of limited Feedback beamforming under feedback delay and confirms the accuracy of the analytical results.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 journal article
Uplink SDMA with limited feedback: Throughput scaling
Eurasip Journal on Advances in Signal Processing, 2008.
Contributors: K. Huang *, R. Heath Jr. & J. Andrews *
TL;DR:
The analysis of throughput scaling suggests guidelines for scheduling in uplink SDMA, including the criterion of minimum quantization errors for the high SNR regime and maximum channel power for the lowSNR regime.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2008 conference paper
Using higher order cyclostationarity to identify space-time block codes
GLOBECOM - IEEE Global Telecommunications Conference, 3370–3374.
Contributors: M. Deyoung*, * & B. Evans *
TL;DR:
A cyclostationarity-based statistical test to detect space-time block codes, focusing on the two transmitter Alamouti space- time block code (STBC) using fourth order cyclic frequencies is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
60 GHz wireless communications: Emerging requirements and design recommendations
IEEE Vehicular Technology Magazine, 2(3), 41–50.
Contributors: R. Daniels* & R. Heath Jr.
TL;DR:
This paper details design tradeoffs for algorithms in the 60 GHz physical layer including modulation, equalization, and space-time processing and considers the limitations in circuit design, characteristics of the effective wireless channel, and performance requirements to support current and next generation 60 GHz wireless communication applications.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
A MIMO demonstration of Hydra
International Conference on Mobile Computing and Networking, MobiCom'07 Co-Located Workshops -Proceedings of the the Second ACM International Workshop on Wireless Network Testbeds, Experimental Evalua, 101–102.
Contributors: K. Mandke*, R. Daniels*, S. Choi *, S. Nettles* & R. Heath Jr.
TL;DR:
A demonstration of the multiple-input multiple-output (MIMO) functionality of Hydra is proposed and rate and spatial mode adaptation using this MIMO system is investigated.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
A MIMO demonstration of hydra
Proceedings of the 2nd ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation and Characterization, WiNTECH '07, Co-located with the ACM MobiCom 2007 Conference, 101–102. http://www.scopus.com/inward/record.url?eid=2-s2.0-70450228536&partnerID=MN8TOARS
Contributors: K. Mandke, R. Daniels, S. Choi, S. Nettles & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2007 journal article
Adaptive MIMO transmission for exploiting the capacity of spatially correlated channels
IEEE Transactions on Vehicular Technology, 56(2), 619–630.
Contributors: A. Forenza, M. McKay *, A. Pandharipande *, R. Heath Jr. & I. Collings *
author keywords: adaptive modulation; channel capacity; channel coding; fading channels; MIMO systems
TL;DR:
It is demonstrated that adaptive switching between MIMO schemes yields significant capacity gains over fixed transmission schemes, and a practical switching algorithm is proposed that is shown to yield significant spectral efficiency improvements over nonadaptive schemes for typical channel scenarios.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2007 journal article
Blind channel estimation for MIMO-OFDM systems
IEEE Transactions on Vehicular Technology, 56(2), 670–685.
Contributors: C. Shin *, R. Heath Jr. & E. Powers*
author keywords: blind channel estimation; cyclic prefix; multiple-input multiple-output (MIMO) system; orthogonal frequency division multiplexing (OFDM); subspace method; virtual carrier
TL;DR:
It is shown under specific system conditions that the proposed method can be applied to MIMO-OFDM systems without CPs, regardless of the presence of VCs, and obtains an accurate channel estimate with a small number of OFDM symbols, which improves the transmission bandwidth efficiency.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Capacity scaling for MIMO two-way relaying
IEEE International Symposium on Information Theory - Proceedings, 1451–1455.
Contributors: R. Vaze * & R. Heath Jr.
TL;DR:
It is shown that with two- way relay channels it is possible to asymptotically obtain full-duplex performance while using only half-dulex nodes, as the number of relays grows large.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Conference Record - Asilomar Conference on Signals, Systems and Computers: Foreword
Conference Record - Asilomar Conference on Signals, Systems and Computers.
Contributors: V. DeBrunner, M. Brandt-Pearce *, G. Øien, E. Erkip, R. Yates *, S. Batalama*, H. Li *, D. Brooks *
Source: ORCID
Added: September 11, 2020
2007 journal article
Congruent Voronoi tessellations from equiangular lines
Applied and Computational Harmonic Analysis, 23(2), 254–258.
Contributors: B. Mondal, R. Samanta & R. Heath Jr.
TL;DR:
An equiangular set of lines forms the best N-point representation of an isotropically distributed one-dimensional subspace in terms of mutual information and a subspace quantizer defined byEquiangular lines provides equal partial distortion.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Coordinate interleaved orthogonal design with two transmit antennas in spatially correlated Rayleigh fading channels: Symbol-error rate and diversity order
IEICE Transactions on Communications, E90-B(11), 3294–3297.
Contributors: H. Lee *, R. Heath Jr. & E. Powers*
author keywords: space-time block codes (STBCs); coordinate interleaved orthogonal designs (CIODs); symbol-error rate (SER); asymptotic diversity order
TL;DR:
To effectively evaluate the performance of CIODs, union upper and lower bounds on the symbol-error rate (SER) and a corresponding asymptotic diversity order of symmetric structured CIOD are derived.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Coordinated multi-cell MIMO systems with cellular block diagonalization
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1669–1673.
Contributors: J. Zhang *, R. Chen*, J. Andrews * & R. Heath Jr.
TL;DR:
Simulations show that the proposed coordination strategy improves the sum rate over conventional systems and reduces the impact of interference for the cluster-edge users.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Downlink MIMO block diagonalization in the presence of other-cell interference
GLOBECOM - IEEE Global Telecommunications Conference, 4354–4358.
Contributors: S. Shim*, J. Kwak *, R. Heath Jr. & J. Andrews *
TL;DR:
An OCI-aware enhancement to block diagonalization that uses a whitening filter for interference suppression at the receiver and a novel precoder using the interference-plus-noise covariance matrix for each user at the transmitter is presented.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Early results on hydra: A flexible MAC/PHY multihop testbed
IEEE Vehicular Technology Conference, 1896–1900.
Contributors: K. Mandke, S. Choi, G. Kim, R. Grant, R. Daniels, W. Kim, R. Heath Jr., S. Nettles
author keywords: wireless testbed; prototype; cross-layer design
TL;DR:
Early results show Hydra is a capable prototyping tool for wireless network research, and it is argued that for this domain simulation alone is not adequate and that working prototypes are needed to validate algorithms and protocols.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Efficient transmit antenna selection for multiuser MIMO systems with block diagonalization
GLOBECOM - IEEE Global Telecommunications Conference, 3499–3503.
Contributors: R. Chen*, J. Andrews * & R. Heath Jr.
TL;DR:
This paper proposes several low-complexity suboptimal transmit selection algorithms that minimize a symbol error rate (SER) upper bound or maximize a capacity lower bound and results show that these algorithms perform very close to the optimal exhaustive search, while the complexity is much lower.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Ergodic capacity of spatial multiplexing MIMO systems with ZF receivers for log-normal shadowing and rayleigh fading channels
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC.
Contributors: M. Park*, C. Chae * & R. Heath Jr.
TL;DR:
The proposed analytical approach allows investigation of the effects of the shadowing standard deviation and the transmit correlation and numerical and simulation results confirm that under various composite channel scenarios, the analytical results match well with the simulation results.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Hybrid-arq in multihop networks with opportunistic relay selection
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3.
Contributors: C. Lo*, R. Heath Jr. & S. Vishwanath
TL;DR:
The proposed relay selection method is found to achieve throughput gains over a point-to-point transmission strategy and to closely match that of centralized schemes that utilize GPS information.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Impact of mutual coupling and antenna efficiencies on adaptive switching between MIMO transmission strategies
IEEE Vehicular Technology Conference, 749–753.
Contributors: R. Bhagavatula*, R. Heath Jr., A. Forenza, D. Piazza* & K. Dandekar *
TL;DR:
It is shown that (relatively more) accurate switching point estimates can be obtained by taking into account real-life effects like mutual coupling and antenna efficiencies, for switching between statistical beamforming and spatial multiplexing.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Interpolation-Based Multi-Mode Precoding for MIMO-OFDM Systems with Limited Feedback
IEEE Transactions on Wireless Communications, 6(3), 1003–1013.
Contributors: N. Khaled*, B. Mondal*, G. Leus *, * & F. Petré
author keywords: multiple-input multiple-output (MIMO); OFDM; limited feedback; vector quantization; mode selection; linear precoding; matrix interpolation under a unitary constraint
TL;DR:
This paper introduces a novel precoder codebook design that lends itself to precoder interpolation, across subcarriers, followed by mode selection, and introduces a clustered mode selection approach that significantly reduces the feedback overhead related to the mode information on each subcarrier.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Joint interference cancellation and channel shortening in multiuser-MIMO systems
IEEE Transactions on Vehicular Technology, 56(2), 652–660.
Contributors: R. Samanta *, R. Heath Jr. & B. Evans *
author keywords: equalizers; interference suppression; MIMO systems; multiuser channels
TL;DR:
A two-stage receiver structure for interference cancellation in multiuser spatially multiplexed multiple-antenna systems is presented and simulation results show good symbol error performance as compared to existing algorithms with asynchronous multiple-input multiple-output interferers.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Jointly optimized multiuser beamforming for the MIMO broadcast channel with limited feedback
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC.
Contributors: D. Mazzarese*, C. Chae * & R. Heath Jr.
TL;DR:
A low-complexity iterative algorithm to compute the filters is proposed and then a closed-form expression of the filters for the downlink with two transmit antennas is derived, avoiding the need for iterative computation in this case.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Low-complexity user and antenna selection for multiuser MIMO systems with block diagonalization
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3.
Contributors: R. Chen*, J. Andrews *, R. Heath Jr. & Z. Shen *
TL;DR:
This paper proposes a low-complexity suboptimal user and antenna selection algorithm that achieves up to 98% of the optimal sum throughput of the exhaustive search, where the complexity is orders of magnitude lower than the exhaustivesearch method.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Multiplexing/beamforming switching for coded mimo in spatially correlated channels based on closed-form ber approximations
IEEE Transactions on Vehicular Technology, 56(5 I), 2555–2567.
Contributors: M. McKay *, I. Collings *, A. Forenza & R. Heath Jr.
author keywords: adaptive coding; modulation; multiple-input-multiple-output (MIMO) communications; spatially correlated channels
TL;DR:
This paper considers low-complexity coded multiple-input-multiple-output transmission in Rayleigh channels with correlation between antennas at both the transmitter and receiver and calculates the link-level capacity of both schemes with bit-interleaved coded modulation and derives accurate closed-form approximations to the bit error rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Multiuser antenna partitioning for cellular MIMO-CDMA systems
IEEE Transactions on Vehicular Technology, 56(5 I), 2448–2456.
Contributors: W. Choi *, J. Andrews * & R. Heath Jr.
author keywords: antenna partitioning; code division multiple access (CDMA); multiple-input multiple-output (MIMO) systems; outage capacity
TL;DR:
A novel MIMO-CDMA system design based on user partitioning is developed, in which each user is assigned to a single transmit antenna either without regard to channel knowledge or based on antenna-selection feedback bits (dynamic), which has a minimal increase in complexity and would require only small changes to existing CDMA standards.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Multiuser limited feedback for wireless multi-antenna communication
IEEE International Symposium on Information Theory - Proceedings, 2036–2040.
Contributors: K. Huang *, R. Heath Jr. & J. Andrews *
TL;DR:
It is proved that a wireless multi-antenna network using the proposed limited feedback strategy achieves the optimal capacity scaling for the broadcast channel.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
On the existence of equiangular tight frames
Linear Algebra and Its Applications, 426(2-3), 619–635.
Contributors: M. Sustik*, J. Tropp *, I. Dhillon * & R. Heath Jr.
author keywords: equiangular lines; tight frame; harmonic frame; orthogonal vectors; eigenvalues; integer matrix; roots of unity; strongly regular graph
TL;DR:
This article uses field theory to provide detailed conditions on real and complex ETFs and describes restrictions on harmonic ETFs, a specific type of complex ETF that appears in applications.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Opportunistic feedback for multiuser MIMO systems with linear receivers
IEEE Transactions on Communications, 55(5), 1020–1032.
author keywords: diversity methods; feedback; multiple-input multiple-output (MIMO) systems; multiuser channels; scheduling
TL;DR:
A novel multiuser scheduling and feedback strategy for the multiple-input multiple-output (MIMO) downlink achieves multiusers diversity gain without substantial feedback requirements.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Opportunistic relay selection with limited feedback
IEEE Vehicular Technology Conference, 135–139.
Contributors: C. Lo*, R. Heath Jr. & S. Vishwanath *
TL;DR:
It is demonstrated that only one additional bit of feedback is necessary for good throughput performance and this paper closes the performance gap by adding another level of channel feedback to the decentralized relay selection problem.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Opportunistic space-division multiple access with beam selection
IEEE Transactions on Communications, 55(12), 2371–2380.
Contributors: W. Choi *, A. Forenza*, J. Andrews * & R. Heath Jr.
author keywords: beamforming; multiple-input multiple-output (MIMO); space-division multiple access (SDMA)
TL;DR:
A novel transmission technique for the multiple-input multiple-output (MIMO) broadcast channel is proposed that allows simultaneous transmission to multiple users under a limited feedback requirement and provides throughput gains for the MIMO broadcast channel with a small feedback overhead.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Optimizing MIMO antenna placement and array configurations for multimedia delivery in aircraft
IEEE Vehicular Technology Conference, 425–429.
Contributors: R. Bhagavatula*, R. Heath Jr. & S. Vishwanath *
TL;DR:
The feasibility of multiple-input multiple-output (MIMO) systems in aircraft is examined for the specific application of seatback entertainment, using an approach built around a site-specific capacity analysis methodology.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Orthogonal beamforming for SDMA downlink with limited feedback
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3.
Contributors: K. Huang *, J. Andrews * & R. Heath Jr.
TL;DR:
A practical algorithm for joint scheduling and orthogonal beamforming, enabled by feedback of quantized channel state information (CSI), which achieves higher sum capacities than the conventional ones is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Overcoming interference in spatial multiplexing mimo cellular networks
IEEE Wireless Communications, 14(6), 95–104.
Contributors: J. Andrews *, W. Choi * & R. Heath Jr.
TL;DR:
It is argued that many of the traditional interference management techniques have limited usefulness when viewed in concert with MIMO, and emerging system-level interference-reducing strategies based on cooperation will be important for overcoming interference in future spatial multiplexing cellular systems.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Physical concerns for cross-layer prototyping and wireless network experimentation
International Conference on Mobile Computing and Networking, MobiCom'07 Co-Located Workshops -Proceedings of the the Second ACM International Workshop on Wireless Network Testbeds, Experimental Evalua, 11–18.
Contributors: K. Mandke*, R. Daniels*, S. Choi *, S. Nettles* & R. Heath Jr.
TL;DR:
This paper identifies three features of wireless networking protocols impacted by lower-level characteristics that are often overlooked or misunderstood by many researchers developing wireless protocols or using testbed-based evaluation methods.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Physical concerns for cross-layer prototyping and wireless network experimentation
Proceedings of the 2nd ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation and Characterization, WiNTECH '07, Co-located with the ACM MobiCom 2007 Conference, 11–18. http://www.scopus.com/inward/record.url?eid=2-s2.0-70450225415&partnerID=MN8TOARS
Contributors: K. Mandke, R. Daniels, S. Choi, S. Nettles & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2007 journal article
Quantization on the Grassmann manifold
IEEE Transactions on Signal Processing, 55(8), 4208–4216.
Contributors: B. Mondal*, S. Dutta* & R. Heath Jr.
author keywords: array signal processing; MIMO systems; quantization; rate distortion theory
TL;DR:
Gersho's asymptotic (large rate, small distortion) distortion bounds are extended to the case when the source is distributed on the complex Grassmann manifold.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Reduced complexity signal detection for OFDM systems with transmit diversity
Journal of Communications and Networks, 9(1), 75–82. http://www.scopus.com/inward/record.url?eid=2-s2.0-34247103991&partnerID=MN8TOARS
Contributors: J. Kim, R. Heath Jr. & E. Powers
Source: ORCID
Added: September 11, 2020
2007 conference paper
Reduced rank signaling in spatially correlated MIMO channels
IEEE International Symposium on Information Theory - Proceedings, 1081–1085.
Contributors: V. Raghavan*, V. Veeravalli * & R. Heath Jr.
TL;DR:
This work quantifies the impact of spatial correlation on the M-th transition-SNR, defined as the smallest SNR at which rank-M transmission becomes optimal, and studies communication with a low-complexity family of input covariance matrices that are characterized by their rank, assuming uniform power allocation over the smaller-dimensional eigen-space.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
SDMA with a sum feedback rate constraint
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3.
Contributors: K. Huang *, R. Heath Jr. & J. Andrews *
TL;DR:
Numerical results show that the proposed SDMA design is capable of attaining higher sum capacities than existing ones, even though the sum feedback rate is bounded, and to achieve a sum capacity growth rate close to the optimal one.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Shifting the MIMO Paradigm
IEEE Signal Processing Magazine, 24(5), 36–46.
Contributors: D. Gesbert*, M. Kountouris *, R. Heath Jr., C. Chae * & T. Sälzer*
TL;DR:
Multi-user MIMO (MU-MIMO) networks reveal the unique opportunities arising from a joint optimization of antenna combining techniques with resource allocation protocols, and brings robustness with respect to multipath richness, yielding the diversity and multiplexing gains without the need for multiple antenna user terminals.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Simplified spatial correlation models for clustered MIMO channels with different array configurations
IEEE Transactions on Vehicular Technology, 56(4 II), 1924–1934.
Contributors: A. Forenza, D. Love * & R. Heath Jr.
author keywords: channel capacity; circular arrays; correlation; linear arrays; multipath channels; multiple-input multiple-output (MIMO) systems
TL;DR:
An approximate spatial correlation model for clustered multiple-input multiple-output (MIMO) channels is proposed and used to show that the proposed model is a good fit to the existing parametric models for low angle spreads (i.e., smaller than 10deg).
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Smart antennas for next generation wireless systems
Eurasip Journal on Wireless Communications and Networking, 2007.
Contributors: A. Alexiou, M. Navarro * & R. Heath Jr.
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2007 journal article
Space division multiple access with a sum feedback rate constraint
IEEE Transactions on Signal Processing, 55(7 II), 3879–3891.
Contributors: K. Huang *, R. Heath Jr. & J. Andrews *
author keywords: broadcast channels; feedback communication; multiuser channels; space division multiplexing
TL;DR:
Numerical results show that the proposed SDMA design is capable of attaining higher sum capacities than existing ones, even though the sum feedback rate is bounded, and is shown to achieve a sum capacity growth rate close to the optimal one.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Sum capacity of multiuser MIMO broadcast channels with block diagonalization
IEEE Transactions on Wireless Communications, 6(6), 2040–2045.
Contributors: Z. Shen *, R. Chen*, J. Andrews *, R. Heath Jr. & B. Evans *
author keywords: MIMO; capacity; multiuser; broadcast channels; precoding; dirty paper coding
TL;DR:
This paper analytically compares BD without receive antenna selection to DPC for a set of given channels and shows that if the user channels are orthogonal to each other, then BD achieves the same sum capacity as DPC; and an upper bound on the ergodic sum capacity gain of DPC over BD is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Systematic codebook designs for quantized beamforming in correlated MIMO channels
IEEE Journal on Selected Areas in Communications, 25(7), 1298–1310.
Contributors: V. Raghavan, R. Heath Jr. & A. Sayeed
author keywords: diversity methods; fading channels; Grassmannian line packing; limited feedback; MIMO systems; quantization
TL;DR:
This paper proposes a universal codebook design for correlated channels when channel statistical information is known at the transmitter that is robust to channel statistics and is implemented by maps that can rotate and scale spherical caps on the Grassmannian manifold.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Throughput scaling of uplink SDMA with limited feedback
Conference Record - Asilomar Conference on Signals, Systems and Computers, 292–296.
Contributors: K. Huang *, J. Andrews * & R. Heath Jr.
TL;DR:
The results provide guidelines for designing uplink SDMA to achieve optimum throughput scaling and suggest that in the high SNR regime, scheduling should select users with small CSI quantization error.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 journal article
Transmit selection diversity for unitary precoded multiuser spatial multiplexing systems with linear receivers
IEEE Transactions on Signal Processing, 55(3), 1159–1171.
Contributors: R. Chen*, R. Heath Jr. & J. Andrews *
author keywords: diversity methods; multiple-input multiple-output (MIMO) systems; precoding
TL;DR:
Two precoding methods that use extra transmit antennas, beyond the minimum required, to provide additional degrees of diversity and mutual information over single-user multiple-input multiple-output (MIMO) methods and static allocation methods are proposed.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2007 journal article
Uplink power control in multi-cell spatial multiplexing wireless systems
IEEE Transactions on Wireless Communications, 6(7), 2700–2711.
Contributors: R. Chen*, J. Andrews *, R. Heath Jr. & A. Ghosh *
author keywords: MIMO systems; power control
TL;DR:
Numerical results show that power control, compared to supposedly optimal waterfilling strategies, actually achieves higher throughput at the low SINRs typical in cellular systems, with significantly lower overhead and complexity.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2007 conference paper
Welcome message from the technical program co-chairs
IEEE Vehicular Technology Conference.
Source: ORCID
Added: September 11, 2020
2006 journal article
A joint source-channel distortion model for JPEG compressed images
IEEE Transactions on Image Processing, 15(6), 1349–1364.
Contributors: M. Sabir*, H. Sheikh*, R. Heath Jr. & A. Bovik *
author keywords: distortion model; joint source-channel coding (JSCC); JPEG; unequal power allocation (UPA)
MeSH headings : Algorithms; Artifacts; Computer Communication Networks; Computer Graphics; Computer Simulation; Data Compression / methods; Data Interpretation, Statistical; Image Enhancement / methods; Image Interpretation, Computer-Assisted / methods; Models, Statistical; Signal Processing, Computer-Assisted
TL;DR:
This paper presents a statistical model for estimating the distortion introduced in progressive JPEG compressed images due to quantization and channel bit errors in a joint manner and presents an unequal power allocation scheme as a simple application of the model.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
A lattice-based MIMO broadcast precoder with block diagonalization for multi-stream transmission
GLOBECOM - IEEE Global Telecommunications Conference.
Contributors: S. Shim*, C. Chae * & R. Heath Jr.
TL;DR:
Monte Carlo simulations under the case of equal power allocation show that the proposed lattice based multi-user precoder that uses block diagonalization combined with pre-equalization and perturbation for the multiuser MIMO broadcast channel provides better diversity and BER performance than block diagonalized with a zero-forcing receiver.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
A linear estimator optimized for the structural similarity index and its application to image denoising
Proceedings - International Conference on Image Processing, ICIP, 2637–2640.
Contributors: S. Channappayya *, A. Bovik * & R. Heath Jr.
author keywords: image restoration
TL;DR:
A perceptual distortion metric-the structural similarity (SSIM) index is used to derive a new linear estimator for estimating zero-mean Gaussian sources distorted by additive white Gaussian noise (AWGN), which clearly outperforms the LLSE estimator in terms of the visual quality of the denoised images.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
A throughput-based adaptive MIMO-BICM approach for spatially-correlated channels
IEEE International Conference on Communications, 3, 1374–1379.
Contributors: M. McKay *, I. Collings *, A. Forenza & R. Heath Jr.
TL;DR:
A practical adaptive algorithm is proposed which selects the combination of code-rate, modulation format, and MIMO transmission scheme (SB or ZF) that maximizes throughput whilst maintaining a pre-defined BER.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Achievable sum rate bounds of zero-forcing based linear multi-user MIMO systems
44th Annual Allerton Conference on Communication, Control, and Computing 2006, 3, 1134–1140. http://www.scopus.com/inward/record.url?eid=2-s2.0-84940659014&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2006 journal article
Benefit of pattern diversity via two-element array of circular patch antennas in indoor clustered MIMO channels
IEEE Transactions on Communications, 54(5), 943–954.
Contributors: A. Forenza* & R. Heath Jr.
author keywords: antenna arrays; diversity methods; microstrip antennas; multiple-input multiple-output (MIMO) systems; Rician channels
TL;DR:
This paper analytically derives the spatial correlation coefficients of this array as a function of the mode excited, for realistic clustered MIMO channel models, and compares the performance of the circular patch array (CPA) against an array of two spaced dipoles.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Capacity of opportunistic space division multiple access with beam selection
GLOBECOM - IEEE Global Telecommunications Conference.
Contributors: W. Choi, A. Forenza, J. Andrews & R. Heath Jr.
TL;DR:
A novel transmission technique for the multiple-input multiple-output (MIMO) broadcast channel is proposed that allows simultaneous transmission to multiple users under a limited feedback requirement and provides throughput gains for the MIMO broadcast channel with a small feedback overhead.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 journal article
Channel adaptive quantization for limited feedback MIMO beamforming systems
IEEE Transactions on Signal Processing, 54(12), 4717–4729.
Contributors: B. Mondal* & R. Heath Jr.
author keywords: adaptive quantization; beamforming; multiple-input multiple-output (MIMO)
TL;DR:
Simulation results show that in the case of correlated channels, the SNR performance of the link can be significantly improved by adaptation, compared with nonadaptive quantization strategies designed for uncorrelated Rayleigh-fading channels.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Coordinated beamforming for multiuser MIMO systems with limited feedforward
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1511–1515.
Contributors: C. Chae *, D. Mazzarese* & R. Heath Jr.
TL;DR:
An iterative algorithm for jointly designing the beamforming and combining vectors, which enforces a zero interference requirement after combining is proposed, which approaches the sum capacity of the MIMO broadcast channel.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Effect of feedback delay on multi-antenna limited feedback for temporally-correlated channels
GLOBECOM - IEEE Global Telecommunications Conference.
Contributors: K. Huang *, B. Mondai, R. Heath Jr. & J. Andrews *
TL;DR:
Using this method, the ergodic capacity with delayed feedback of channel state information is derived and the capacity gain with respect to the case of no feedback is shown to decrease at least exponentially with the feedback delay.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 chapter
Feedback techniques for MIMO channels
In MIMO System Technology for Wireless Communications (pp. 113–146). http://www.scopus.com/inward/record.url?eid=2-s2.0-78650263108&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2006 journal article
Generalized finite algorithms for constructing Hermitian matrices with prescribed diagonal and spectrum
SIAM Journal on Matrix Analysis and Applications, 27(1), 61–71.
Contributors: I. Dhillon, R. Heath Jr., M. Sustik & J. Tropp
author keywords: Hermitian matrices; majorization; Schur-Horn theorem; inverse eigenvalue problem; plane rotations; finite-step algorithms
TL;DR:
New algorithms that can replace the diagonal entries of a Hermitian matrix by any set of diagonal entries that majorize the original set without altering the eigenvalues of the matrix are presented.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 journal article
Interpolation based unitary preceding for spatial multiplexing MIMO-OFDM with limited feedback
IEEE Transactions on Signal Processing, 54(12), 4730–4740.
Contributors: J. Choi *, B. Mondal* & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2006 conference paper
Joint source-channel distortion modelling for MPEG-4 video
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 4. http://www.scopus.com/inward/record.url?eid=2-s2.0-33947671283&partnerID=MN8TOARS
Contributors: M. Sabir, R. Heath Jr. & A. Bovik
Source: ORCID
Added: September 11, 2020
2006 journal article
Limited feedback diversity techniques for correlated channels
IEEE Transactions on Vehicular Technology, 55(2), 718–722.
Contributors: D. Love * & R. Heath Jr.
author keywords: beamforming; diversity methods; limited feedback; multiple antennas
TL;DR:
This correspondence addresses the design of limited feedback beamformers when the channel is correlated and employs multiple antennas at the transmitter.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 journal article
Low complexity user selection algorithms for multiuser MIMO systems with block diagonalization
IEEE Transactions on Signal Processing, 54(9), 3658–3663.
Contributors: Z. Shen *, R. Chen*, J. Andrews *, R. Heath Jr. & B. Evans *
author keywords: downlink; Frobenius norm; multiple-input multipleoutput (MIMO); multiuser; sum capacity
TL;DR:
This work proposes two low-complexity suboptimal user selection algorithms for multiuser MIMO systems with block diagonalization that aim to select a subset of users such that the total throughput is nearly maximized.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Markov models for limited feedback mimo systems
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 4. http://www.scopus.com/inward/record.url?eid=2-s2.0-33947693199&partnerID=MN8TOARS
Contributors: K. Huang, B. Mondal, R. Heath Jr. & J. Andrews
Source: ORCID
Added: September 11, 2020
2006 conference paper
Multi-antenna limited feedback for temporally-correlated channels: Feedback compression
GLOBECOM - IEEE Global Telecommunications Conference.
Contributors: K. Huang, B. Mondal, R. Heath Jr. & J. Andrews
TL;DR:
A novel method is proposed for reducing the feedback rate of a transmit beamforming system with feedback of quantized channel state information that can be compressed by more than 100% without degrading the system performance.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Multichannel feedback in OFDM ad hoc networks
2006 3rd Annual IEEE Communications Society on Sensor and Adhoc Communications and Networks, Secon 2006, 2, 701–706.
TL;DR:
A multichannel feedback protocol to enable local scheduling with channel state information for wireless networks with orthogonal frequency division multiplexing (OFDM) and it is shown that the proposed protocol improves the network throughput compared to IEEE 802.11 style protocols.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
On achievable sum rates of a multiuser MIMO relay channel
IEEE International Symposium on Information Theory - Proceedings, 1026–1030.
TL;DR:
Simulations show that the proposed system architecture and algorithms achieve sum rate performance that is close to the derived performance upper bound.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 journal article
On quasi-orthogonal signatures for CDMA systems
IEEE Transactions on Information Theory, 52(3), 1217–1226.
Contributors: R. Heath Jr., T. Strohmer* & A. Paulraj*
author keywords: code-division multiple-access (CDMA) systems; Walsh sequences
TL;DR:
This correspondence considers signature sets that are less sensitive to changes in the number of active users, and links are made between these signature design problems, Grassmannian line packing, frame theory, and algebraic geometry.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
On the SNR and diversity of quantized precoded MIMO systems
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC.
Contributors: B. Mondal* & R. Heath Jr.
TL;DR:
The loss in channel gain (transmit array gain) due to precoder quantization is characterized as a function of the feedback data-rate for precoded SM system with linear receivers and STBC systems.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Opportunistic feedback and online optimization for multiuser MIMO systems with linear receivers
Conference Record - Asilomar Conference on Signals, Systems and Computers, 794–798.
Contributors: T. Tang *, R. Heath Jr., S. Cho & S. Yun*
TL;DR:
The main advantages of the proposed protocol are that it substantially reduces the feedback requirements, still achieves multiuser diversity gain, and provides some fairness without a priori assumptions about the channel distribution.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 journal article
Performance analysis of quantized beamforming MIMO systems
IEEE Transactions on Signal Processing, 54(12), 4753–4766.
Contributors: B. Mondal* & R. Heath Jr.
author keywords: beamforming; multiple-input multiple-output (MIMO); quantization; rate-distortion
TL;DR:
Lower bounds are derived on the expected SNR loss and the outage probability of systems that have a single receive antenna or two transmit antennas and analytical expressions are proved to be tight with asymptotically large feedback rate.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Power control for cellular MIMO systems
GLOBECOM - IEEE Global Telecommunications Conference.
Contributors: R. Chen, J. Andrews, R. Heath Jr. & A. Ghosh *
TL;DR:
This paper proposes a novel multidimensional power control technique for the uplink of cellular MIMO systems that incorporates single antenna, orthogonal multi-carrier, and utility-based power control schemes as special cases.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Quantization on the complex projective space
Data Compression Conference Proceedings, 242–251.
Contributors: B. Mondal*, S. Dutta* & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2006 journal article
Space-time water-filling for composite MIMO fading channels
Eurasip Journal on Wireless Communications and Networking, 2006.
Contributors: Z. Shen *, R. Heath Jr., J. Andrews * & B. Evans *
TL;DR:
The ergodic capacity and channel outage probability for a composite MIMO channel model, which includes both fast fading and shadowing effects, are analyzed and it is shown that the analytical capacity and outage probability results agree very well with those obtained from Monte Carlo simulations.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Sum capacity of multiuser MIMO broadcast channels with block diagonalization
IEEE International Symposium on Information Theory - Proceedings, 886–890.
Contributors: Z. Shen *, R. Chen*, J. Andrews *, R. Heath Jr. & B. Evans *
TL;DR:
The sum capacity loss of block diagonalization for a fixed channel is studied and an upper bound on the ergodic sum capacity gain of DPC over BD is derived, which can be evaluated with a few numerical integrations.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Switching between OSTBC and spatial multiplexing with linear receivers in spatially correlated MIMO channels
IEEE Vehicular Technology Conference, 3, 1387–1391. http://www.scopus.com/inward/record.url?eid=2-s2.0-34047147890&partnerID=MN8TOARS
Contributors: A. Forenza, M. McKay, I. Collings & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2006 conference paper
Tomlinson-Harashima precoding with adaptive modulation for fixed relay networks
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC.
TL;DR:
This paper proposes an implementable multiuser precoding strategy that combines Tomlinson-Harashima precoding at the base station and linear signal processing at the relay with adaptive stream selection and QAM modulation and proposes a reduced complexity algorithm to select a subset of users to avoid an exhaustive search over all user permutations.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2006 conference paper
Transmit precoding for the multiple antenna broadcast channel
IEEE Vehicular Technology Conference, 3, 1396–1400. http://www.scopus.com/inward/record.url?eid=2-s2.0-34047133270&partnerID=MN8TOARS
Contributors: M. Airy, S. Bhadra, R. Heath Jr. & S. Shakkottai
Source: ORCID
Added: September 11, 2020
2005 conference paper
A joint MIMO-OFDM transceiver and MAC design for mobile ad hoc networking
2004 International Workshop on Wireless Ad-Hoc Networks, 315–319. http://www.scopus.com/inward/record.url?eid=2-s2.0-28244475399&partnerID=MN8TOARS
Contributors: T. Tang, M. Park, R. Heath Jr. & S. Nettles
Source: ORCID
Added: September 11, 2020
2005 conference paper
A space-time receiver for MIMO-OFDM ad hoc networks
Proceedings - IEEE Military Communications Conference MILCOM, 2005.
Contributors: T. Tang * & R. Heath Jr.
TL;DR:
A receiver architecture that can demodulate multiple data streams with different frequency offsets and propagation delays in multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) ad hoc networks is proposed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Adaptive MIMO transmission scheme: Exploiting the spatial selectivity of wireless channels
IEEE Vehicular Technology Conference, 61(5), 3188–3192. http://www.scopus.com/inward/record.url?eid=2-s2.0-26444553593&partnerID=MN8TOARS
Contributors: A. Forenza, A. Pandharipande, H. Kim & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2005 conference paper
Algorithms for quantized precoded MIMO-OFDM systems
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2005, 381–385. http://www.scopus.com/inward/record.url?eid=2-s2.0-33847639400&partnerID=MN8TOARS
Contributors: B. Mondal & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2005 conference paper
Algorithms for quantized precoding in MIMO OFDM beamforming systems
Proceedings of SPIE - The International Society for Optical Engineering, 5847, 80–87.
Contributors: B. Mondal* & R. Heath Jr.
author keywords: MIMO OFDM; beamforming; quantization; clustering; feedback
TL;DR:
In this paper, orthogonal frequency division multiplexing (OFDM) is considered as a low complexity implementation of MIMO beamforming combining over frequency selective channels.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Antenna partitioning for multiuser MIMO-CDMA
GLOBECOM - IEEE Global Telecommunications Conference, 3, 1535–1539.
Contributors: W. Choi *, J. Andrews * & R. Heath Jr.
TL;DR:
A simple and novel MIMO-CDMA system design is developed, in which users are assigned to a transmit antenna either without regard to channel knowledge or based on antenna selection feedback bits, and it is shown that they outperform conventional CDMA systems regardless of the number of antennas or antenna partitioning technique.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Capacity enhancement via multi-mode adaptation in spatially correlated MIMO channels
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, 2, 754–758. http://www.scopus.com/inward/record.url?eid=2-s2.0-34047199879&partnerID=MN8TOARS
Contributors: A. Forenza, M. McKay, A. Pandharipande, R. Heath Jr. & I. Collings
Source: ORCID
Added: September 11, 2020
2005 conference paper
Codebook adaptation for quantized MIMO beamforming systems
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2005, 376–380. http://www.scopus.com/inward/record.url?eid=2-s2.0-33847689465&partnerID=MN8TOARS
Contributors: R. Samanta & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2005 journal article
Designing structured tight frames via an alternating projection method
IEEE Transactions on Information Theory, 51(1), 188–209.
Contributors: J. Tropp *, I. Dhillon *, R. Heath Jr. & T. Strohmer
author keywords: algorithms; code-division multiple access (CDMA); eigenvalues and eigenfunctions; extremal problems; frames; geometry; inverse problems; sequences
TL;DR:
This paper proposes an alternating projection method that is versatile enough to solve a huge class of inverse eigenvalue problems (IEPs), which includes the frame design problem, and addresses the most basic design problem: constructing tight frames with prescribed vector norms.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Frame based multiple description image coding in the wavelet domain
Proceedings - International Conference on Image Processing, ICIP, 3, 920–923.
Contributors: S. Channappayya *, J. Lee*, R. Heath Jr. & A. Bovik *
TL;DR:
A multiple description image coding scheme in the wavelet domain using quantized frame expansions is proposed and a tight frame operator is applied to the zerotrees to evaluate the performance of the scheme over an erasure channel.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Frame theoretic quantization for limited feedback MIMO beamforming systems
2005 International Conference on Wireless Networks, Communications and Mobile Computing, 2, 1065–1070.
Contributors: B. Mondal*, R. Samanta * & R. Heath Jr.
TL;DR:
A mutual information based codebook design criterion is introduced and equiangular frames (EF) are proposed as beamforming codebooks satisfying this criterion, which result in higher receive signal-to-noise ratio compared to codebooks designed using VQ or GLP.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 journal article
Interpolation based transmit beamforming for MIMO-OFDM with limited feedback
IEEE Transactions on Signal Processing, 53(11), 4125–4135.
Contributors: J. Choi * & R. Heath Jr.
author keywords: antenna diversity; MIMO-OFDM; mutual information; spherical interpolation; transmit beamforming
Source: ORCID
Added: September 11, 2020
2005 conference paper
Interpolation-based multi-mode precoding for MIMO-OFDM systems
13th European Signal Processing Conference, EUSIPCO 2005, 1552–1555. http://www.scopus.com/inward/record.url?eid=2-s2.0-84863701197&partnerID=MN8TOARS
Contributors: N. Khaled, R. Heath Jr., G. Leus, B. Mondal & F. Petré
Source: ORCID
Added: September 11, 2020
2005 journal article
Limited feedback unitary precoding for orthogonal space-time block codes
IEEE Transactions on Signal Processing, 53(1), 64–73.
Contributors: D. Love * & R. Heath Jr.
author keywords: diversity methods; Grassmannian subspace packing; MIMO systems; orthogonal space-time block coding; quantized precoding; Rayleigh channels
TL;DR:
This paper investigates a limited feedback approach that uses a codebook of precoding matrices known a priori to both the transmitter and receiver and the resulting design is found to relate to the famous applied mathematics problem of subspace packing in the Grassmann manifold.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 journal article
Limited feedback unitary precoding for spatial multiplexing systems
IEEE Transactions on Information Theory, 51(8), 2967–2976.
Contributors: D. Love * & R. Heath Jr.
author keywords: diversity methods; Grassmannian subspace packing; multiple-input multiple-output (MIMO) systems; quantized precoding; Rayleigh channels; spatial multiplexing; vertical Bell Labs layered spacetime (V-BLAST) architecture
TL;DR:
This correspondence proposes a quantized precoding system where the optimal precoder is chosen from a finite codebook known to both receiver and transmitter and performs close to optimal unitary precoding with a minimal amount of feedback.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Low complexity user selection algorithms for multiuser MIMO systems with block diagonalization
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2005, 628–632. http://www.scopus.com/inward/record.url?eid=2-s2.0-33847644173&partnerID=MN8TOARS
Contributors: Z. Shen, R. Chen, J. Andrews, R. Heath Jr. & B. Evans
Source: ORCID
Added: September 11, 2020
2005 conference paper
Min-SER space-time equalization in asynchronous MIMO-OFDM systems
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2005, 440–444.
Contributors: T. Tang * & R. Heath Jr.
TL;DR:
Numerical simulations show good uncoded bit error rate performance for the proposed algorithm for the design of space-time equalizer in asynchronous MIMO-OFDM systems.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 journal article
Multimode antenna selection for spatial multiplexing systems with linear receivers
IEEE Transactions on Signal Processing, 53(8), 3042–3056.
Contributors: R. Heath Jr. & D. Love *
author keywords: antenna selection; diversity methods; MIMO systems
TL;DR:
This paper proposes multimode antenna selection, which uses a low-rate feedback channel to improve the error rate performance of spatial multiplexing systems with linear receivers.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 journal article
Multimode precoding for MIMO wireless systems
IEEE Transactions on Signal Processing, 53(10 I), 3674–3687.
Contributors: D. Love * & R. Heath Jr.
author keywords: diversity methods; MIMO systems; quantized precoding; Rayleigh channels; spatial multiplexing
TL;DR:
It is shown that these substreams can be designed to obtain full diversity and full rate gain using feedback from the receiver to transmitter, and Monte Carlo simulations show substantial performance gains over beamforming and spatial multiplexing.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Multiple description image coding using natural scene statistics
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, II.
Contributors: S. Channappayya *, R. Heath Jr. & A. Bovik *
TL;DR:
An error-resilient image communications application that uses the GSM model and multiple description coding (MDC) to provide error- Resilience, and derives a rate-distortion bound for GSM random variables, derive the redundancy rate- Distortion function, and finally implement an MD image communication system.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 journal article
Necessary and sufficient conditions for full diversity order in correlated Rayleigh fading beamforming and combining systems
IEEE Transactions on Wireless Communications, 4(1), 20–23.
Contributors: D. Love * & R. Heath Jr.
author keywords: beamforming; combining; correlated fading; diversity methods; MIMO systems; Rayleigh channels; transmitreceive diversity
TL;DR:
It is of utmost importance to guarantee that the sets of beamforming and combining vectors are chosen such that full diversity order is achieved in correlated Rayleigh fading.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 journal article
OFDM power loading using limited feedback
IEEE Transactions on Vehicular Technology, 54(5), 1773–1780.
Contributors: D. Love * & R. Heath Jr.
author keywords: limited feedback; orthogonal frequency division multiplexing; power loading
TL;DR:
Simulation results show that the proposed limited feedback techniques provide performance close to full channel knowledge power loading, and two power allocation selection algorithms that optimize the probability of symbol error and capacity, respectively.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2005 journal article
Opportunistic feedback for downlink multiuser diversity
IEEE Communications Letters, 9(10), 948–950.
Contributors: T. Tang * & R. Heath Jr.
author keywords: feedback; multiuser channels; diversity methods; protocols; opportunistic
TL;DR:
This paper proposes a random access based feedback protocol for achieving multiuser diversity with a fixed number of feedback slots that is jointly designed to maximize the average sum rate of all users.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Pattern diversity with multi-mode circular patch antennas in clustered MIMO channels
IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), 3 B, 438–441.
Contributors: A. Forenza*, F. Sun * & R. Heath Jr.
TL;DR:
This work analytically compute the spatial correlation coefficients and evaluates the MIMO channel capacity using clustered channel models adopted by the IEEE 802.11n standard body for wireless local area networks (WLANs).
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Performance evaluation of 2-element arrays of circular patch antennas in indoor clustered MIMO channels
Proceedings - IEEE Military Communications Conference MILCOM, 2005.
Contributors: A. Forenza & R. Heath Jr.
TL;DR:
A computationally efficient method to evaluate the performance of circular patch arrays (CPAs) in clustered MIMO channel models based on bounds to the eigenvalues of the spatial correlation matrix, which yields dramatic reduction in computational complexity.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Performance of the MIMO downlink channel with multi-mode adaptation and scheduling
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2005, 695–699.
Contributors: A. Forenza, M. Airy, M. Kountouris *, R. Heath Jr., D. Gesbert* & S. Shakkottai *
TL;DR:
This paper presents an algorithm for switching transmission methods (whether for diversity or data rate maximization) over a multiple antenna broadcast channel and investigates the performance of this adaptive transmission method with different scheduling polices.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Quantization on the grassmann manifold: Applications to precoded mimo wireless systems
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, V.
Contributors: B. Mondal*, R. Heath Jr. & L. Hanlen
TL;DR:
This paper studies the problem of quantization of a source that lives on the complex Grassmann manifold, and the expected distortion for such a quantizer is approximately characterized.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Quantized multi-mode precoding for spatial multiplexing MIMO-OFDM system
IEEE Vehicular Technology Conference, 2, 867–871.
Contributors: N. Khaled*, B. Mondal*, * , G. Leus * & F. Petre*
TL;DR:
This paper proposes to reduce the feedback requirements by sending back the quantized precoding matrices of a fraction of the subcarriers and obtaining the other precoders using interpolation, and two algorithms are proposed for the interpolation of unitary matrices.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Rate bounds for MIMO relay channels using precoding
GLOBECOM - IEEE Global Telecommunications Conference, 3, 1172–1176.
Contributors: C. Lo*, S. Vishwanath * & R. Heath Jr.
TL;DR:
New lower bounds on the capacity of a Gaussian MIMO relay channel are derived under the assumption that the transmitter employs either superposition coding or dirty-paper coding.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 journal article
Receiver designs for Alamouti coded OFDM systems in fast fading channels
IEEE Transactions on Wireless Communications, 4(2), 550–559.
Contributors: J. Kim, R. Heath Jr. & E. Powers
author keywords: equalization; fast fading; orthogonal frequency-division multiplexing (OFDM); sequence estimation; transmit diversity
TL;DR:
A sequential decision feedback sequence estimation (SDFSE) scheme with an adaptive threshold (AT), a traditionally single-carrier equalization technique, is used to mitigate the performance degradation and a new method to set the threshold value is proposed.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2005 journal article
Simulation of MIMO channel capacity with antenna polarization diversity
IEEE Transactions on Wireless Communications, 4(4), 1869–1872.
TL;DR:
Simulation results show that, with a special transmit geometry, using the collocated trimonopole antennas at a size-constrained receiver can offer channel capacity that approaches the capacity of an uncorrelated MIMO Rayleigh channel.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 journal article
Space-time chase decoding
IEEE Transactions on Wireless Communications, 4(5), 2035–2039.
Contributors: D. Love *, S. Hosur*, A. Batra * & R. Heath Jr.
author keywords: chase decoding; maximum-likelihood (ML) decoding; multiple-input multiple-output (MIMO) systems; spatial multiplexing; sphere decoding
TL;DR:
A modified version of the classic Chase decoder for multiple-antenna systems is proposed, which can be adjusted to have a fixed or variable complexity, while maintaining performance close to that of an ML decoder.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 journal article
Space-time interference cancellation in MIMO-OFDM systems
IEEE Transactions on Vehicular Technology, 54(5), 1802–1816.
Contributors: T. Tang * & R. Heath Jr.
author keywords: cancellation; interference; MIMO; OFDM; space-time
TL;DR:
Simulations compare various training-based methods and show the proposed methods provide good bit error rate (BER) and SINR performance in a variety of interference scenarios.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 journal article
Switching between diversity and multiplexing in MIMO systems
IEEE Transactions on Communications, 53(6), 962–972.
Contributors: R. Heath Jr. & A. Paulraj
author keywords: multiple-input multiple-output (MIMO) systems; space-time coding; transmit diversity
TL;DR:
Switch between spatial multiplexing and transmit diversity is proposed as a simple way to improve the diversity performance of spatialmultiplexing.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2005 conference paper
Unequal power allocation for JPEG transmission over MIMO systems
Conference Record - Asilomar Conference on Signals, Systems and Computers, 2005, 1608–1612. http://www.scopus.com/inward/record.url?eid=2-s2.0-33847652903&partnerID=MN8TOARS
Contributors: M. Sabir, R. Heath Jr. & A. Bovik
Source: ORCID
Added: September 11, 2020
2004 conference paper
A joint source-channel distortion model for JPEG compressed images
Proceedings - International Conference on Image Processing, ICIP, 2, 3249–3252. http://www.scopus.com/inward/record.url?eid=2-s2.0-20444476685&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2004 conference paper
A low complexity algorithm to simulate the spatial covariance matrix for clustered MIMO channel models
IEEE Vehicular Technology Conference, 59(2), 889–893. http://www.scopus.com/inward/record.url?eid=2-s2.0-15544385927&partnerID=MN8TOARS
Contributors: A. Forenza, D. Love & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
A lower bound on outage probability of limited feedback MIMO beamforming systems
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1, 876–880. http://www.scopus.com/inward/record.url?eid=2-s2.0-21644441092&partnerID=MN8TOARS
Contributors: B. Mondai & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
A space-time FIR equalizer training algorithm for MIMO-OFDM systems
2004 International Conference on Signal Processing and Communications, SPCOM, 550–554. http://www.scopus.com/inward/record.url?eid=2-s2.0-28244490587&partnerID=MN8TOARS
Contributors: T. Tang & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Adaptive feedback for MIMO beamforming systems
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 213–217. http://www.scopus.com/inward/record.url?eid=2-s2.0-21644470893&partnerID=MN8TOARS
Contributors: B. Mondal & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
An upper bound on SNR for limited feedback MIMO beamforming systems
2004 IEEE Information Theory Workshop - Proceedings, ITW, 408–412. http://www.scopus.com/inward/record.url?eid=2-s2.0-19544380000&partnerID=MN8TOARS
Contributors: B. Mondal & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Chase decoding for space-time codes
IEEE Vehicular Technology Conference, 60(3), 1663–1667. http://www.scopus.com/inward/record.url?eid=2-s2.0-17144430439&partnerID=MN8TOARS
Contributors: D. Love, S. Hosur, A. Batra & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Comparison of space-time water-filling and spatial water-filling for MIMO fading channels
GLOBECOM - IEEE Global Telecommunications Conference, 1, 431–435. http://www.scopus.com/inward/record.url?eid=2-s2.0-18144376745&partnerID=MN8TOARS
Contributors: Z. Shen, R. Heath Jr., J. Andrews & B. Evans
Source: ORCID
Added: September 11, 2020
2004 conference paper
Construction of equiangular signatures for synchronous CDMA systems
IEEE International Symposium on Spread Spectrum Techniques and Applications, 708–712. http://www.scopus.com/inward/record.url?eid=2-s2.0-26944493737&partnerID=MN8TOARS
Contributors: R. Heath Jr., J. Tropp, I. Dhillon & T. Strohmer
Source: ORCID
Added: September 11, 2020
2004 journal article
Diversity performance of precoded orthogonal space-time block codes using limited feedback
IEEE Communications Letters, 8(5), 305–307.
Contributors: D. Love & R. Heath Jr.
author keywords: antenna selection; diversity methods; feedback; MIMO systems; space-time coding
TL;DR:
It is shown that limited feedback precoding can achieve full diversity order using fewer bits than limited feedback beamforming and a simplified version of antenna subset selection for OSTBCs that can provide full Diversity order with low complexity and only a small amount of feedback.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2004 journal article
Finite-step algorithms for constructing optimal CDMA signature sequences
IEEE Transactions on Information Theory, 50(11), 2916–2921.
Contributors: J. Tropp *, I. Dhillon * & R. Heath Jr.
author keywords: algorithms; code-division multiple access (CDMA); inverse eigenvalue problems; optimal sequences; sum capacity
TL;DR:
This paper restates the sequence design problem as an inverse singular value problem and shows that the problem can be solved with finite-step algorithms from matrix theory and proposes a new one-sided algorithm that is numerically stable and faster than previous methods.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2004 conference paper
Grassmannian beamforming on correlated MIMO channels
GLOBECOM - IEEE Global Telecommunications Conference, 1, 106–110. http://www.scopus.com/inward/record.url?eid=2-s2.0-18144375936&partnerID=MN8TOARS
Contributors: D. Love & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Impact of antenna geometry on MIMO communication in indoor clustered channels
IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), 2, 1700–1703. http://www.scopus.com/inward/record.url?eid=2-s2.0-4544277232&partnerID=MN8TOARS
Contributors: A. Forenza & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Improving throughput and fairness for MIMO ad hoc networks using antenna selection diversity
GLOBECOM - IEEE Global Telecommunications Conference, 5, 3363–3367. http://www.scopus.com/inward/record.url?eid=2-s2.0-18144426381&partnerID=MN8TOARS
Contributors: M. Park, R. Heath Jr. & S. Nettles
Source: ORCID
Added: September 11, 2020
2004 conference paper
Interpolation based transmit beamforming for MIMO-OFDM with limited feedback
IEEE International Conference on Communications, 1, 249–253. http://www.scopus.com/inward/record.url?eid=2-s2.0-4143145417&partnerID=MN8TOARS
Contributors: J. Choi & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Interpolation based unitary precoding for spatial multiplexing MIMO-OFDM with limited feedback
GLOBECOM - IEEE Global Telecommunications Conference, 1, 214–218. http://www.scopus.com/inward/record.url?eid=2-s2.0-18144408720&partnerID=MN8TOARS
Contributors: J. Choi & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Joint frequency offset estimation and interference cancellation for MIMO-OFDM systems
IEEE Vehicular Technology Conference, 60(3), 1553–1557. http://www.scopus.com/inward/record.url?eid=2-s2.0-17144392892&partnerID=MN8TOARS
Contributors: T. Tang & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Limited feedback power loading for OFDM
Proceedings - IEEE Military Communications Conference MILCOM, 1, 71–77. http://www.scopus.com/inward/record.url?eid=2-s2.0-27744510283&partnerID=MN8TOARS
Contributors: D. Love & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Limited feedback precoding for orthogonal space-time block codes
GLOBECOM - IEEE Global Telecommunications Conference, 1, 561–565. http://www.scopus.com/inward/record.url?eid=2-s2.0-18144429497&partnerID=MN8TOARS
Contributors: D. Love & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Long range channel prediction for adaptive OFDM systems
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1, 732–736. http://www.scopus.com/inward/record.url?eid=2-s2.0-21644486341&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2004 conference paper
Multi-mode precoding using linear receivers for limited feedback MIMO systems
IEEE International Conference on Communications, 1, 448–452. http://www.scopus.com/inward/record.url?eid=2-s2.0-4143110330&partnerID=MN8TOARS
Contributors: D. Love & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Multi-user diversity for the multiple antenna broadcast channel with linear receivers: Asymptotic analysis
Conference Record - Asilomar Conference on Signals, Systems and Computers, 1, 886–890. http://www.scopus.com/inward/record.url?eid=2-s2.0-21644458808&partnerID=MN8TOARS
Contributors: M. Airy, R. Heath Jr. & S. Shakkottai
Source: ORCID
Added: September 11, 2020
2004 conference paper
Multiuser space-time block coded MIMO system with downlink precoding
IEEE International Conference on Communications, 5, 2689–2693. http://www.scopus.com/inward/record.url?eid=2-s2.0-4143114693&partnerID=MN8TOARS
Contributors: R. Chen, J. Andrews & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Optimal CDMA signatures: A finite-step approach
IEEE International Symposium on Spread Spectrum Techniques and Applications, 335–339. http://www.scopus.com/inward/record.url?eid=2-s2.0-26944485134&partnerID=MN8TOARS
Contributors: J. Tropp, I. Dhillon & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 conference paper
Practical costa precoding for the multiple antenna broadcast channel
GLOBECOM - IEEE Global Telecommunications Conference, 6, 3942–3946. http://www.scopus.com/inward/record.url?eid=2-s2.0-18144372344&partnerID=MN8TOARS
Contributors: M. Airy, A. Forenza, R. Heath Jr. & S. Shakkottai
Source: ORCID
Added: September 11, 2020
2004 conference paper
Rapid MIMO-OFDM software defined radio system prototyping
IEEE Workshop on Signal Processing Systems, SiPS: Design and Implementation, 182–187. http://www.scopus.com/inward/record.url?eid=2-s2.0-17044378192&partnerID=MN8TOARS
Contributors: A. Gupta, A. Forenza & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 journal article
Special issue: Multiple-input multiple-output (MIMO) communications
Wireless Communications and Mobile Computing, 4(7), 593–696.
Contributors: * , E. Larsson *, R. Murch *, A. Nehorai * & M. Uysal *
Source: ORCID
Added: September 11, 2020
2004 conference paper
Transmit selection diversity for multiuser spatial multiplexing systems
GLOBECOM - IEEE Global Telecommunications Conference, 4, 2625–2629. http://www.scopus.com/inward/record.url?eid=2-s2.0-18144397203&partnerID=MN8TOARS
Contributors: R. Chen, J. Andrews & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2004 journal article
What is the value of limited feedback for MIMO channels?
IEEE Communications Magazine, 42(10), 54–59.
Contributors: D. Love *, R. Heath Jr., W. Santipach * & M. Honig*
TL;DR:
Performance results show that even a few bits of feedback can provide performance close to that with full channel knowledge at the transmitter.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2003 journal article
A Decision-Directed Receiver for Alamouti Coded OFDM Systems
IEICE Transactions on Communications, E86-B(10), 3141–3143. http://www.scopus.com/inward/record.url?eid=2-s2.0-0242412915&partnerID=MN8TOARS
Contributors: J. Kim, R. Heath Jr. & E. Powers
Source: ORCID
Added: September 11, 2020
2003 conference paper
A decision directed receiver for alamouti coded OFDM systems
IEEE Vehicular Technology Conference, 58(1), 662–665. http://www.scopus.com/inward/record.url?eid=2-s2.0-4143073630&partnerID=MN8TOARS
Contributors: J. Kim, B. Jang, R. Heath Jr. & E. Powers
Source: ORCID
Added: September 11, 2020
2003 conference paper
A symbol estimation scheme for Alamouti coded OFDM systems
Proceedings - IEEE Military Communications Conference MILCOM, 2, 1225–1230. http://www.scopus.com/inward/record.url?eid=2-s2.0-3142749994&partnerID=MN8TOARS
Contributors: J. Kim, R. Heath Jr. & E. Powers
Source: ORCID
Added: September 11, 2020
2003 conference paper
CDMA signature sequences with low peak-to-average-power ratio via alternating projection
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 1, 475–479. http://www.scopus.com/inward/record.url?eid=2-s2.0-4143116538&partnerID=MN8TOARS
Contributors: J. Tropp, I. Dhillon, R. Heath Jr. & T. Strohmer
Source: ORCID
Added: September 11, 2020
2003 conference paper
Dual-mode antenna selection for spatial multiplexing systems with linear receivers
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 1, 1085–1089. http://www.scopus.com/inward/record.url?eid=2-s2.0-4143086337&partnerID=MN8TOARS
Contributors: R. Heath Jr. & D. Love
Source: ORCID
Added: September 11, 2020
2003 journal article
Equal gain transmission in multiple-input multiple-output wireless systems
IEEE Transactions on Communications, 51(7), 1102–1110.
Contributors: D. Love * & R. Heath Jr.
author keywords: diversity methods; equal gain transmission (EGT); multiple-input multiple-output (MIMO) systems; Rayleigh channels
Source: ORCID
Added: September 11, 2020
2003 journal article
Erratum: Equal gain transmission in multiple-input multiple-output wireless systems (IEEE Trans. Commun. (2003) 51 (694-703))
IEEE Transactions on Communications, 51(9).
Contributors: D. Love & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2003 conference paper
Grassmannian Signatures for CDMA Systems
Conference Record / IEEE Global Telecommunications Conference, 3, 1553–1557. http://www.scopus.com/inward/record.url?eid=2-s2.0-0842310825&partnerID=MN8TOARS
Contributors: R. Heath Jr., T. Strohmer & A. Paulraj
Source: ORCID
Added: September 11, 2020
2003 journal article
Grassmannian beamforming for multiple-input multiple-output wireless systems
IEEE Transactions on Information Theory, 49(10), 2735–2747.
Contributors: D. Love *, R. Heath Jr. & T. Strohmer
author keywords: diversity methods; Grassmannian line packing; limited feedback; multiple-input multiple-output (MIMO) systems; Rayleigh channels
Source: ORCID
Added: September 11, 2020
2003 conference paper
Grassmannian beamforming for multiple-input multiple-output wireless systems
IEEE International Conference on Communications, 4, 2618–2622. http://www.scopus.com/inward/record.url?eid=2-s2.0-0038648277&partnerID=MN8TOARS
Contributors: D. Love, R. Heath Jr. & T. Strohmer
Source: ORCID
Added: September 11, 2020
2003 journal article
Grassmannian frames with applications to coding and communication
Applied and Computational Harmonic Analysis, 14(3), 257–275.
Contributors: T. Strohmer* & R. Heath Jr.
TL;DR:
The application of Grassmannian frames to wireless communication and to multiple description coding is discussed and their connection to unit norm tight frames for frames which are generated by group-like unitary systems is discussed.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2003 conference paper
Joint space-time interference cancellation and channel shortening
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 1, 32–36. http://www.scopus.com/inward/record.url?eid=2-s2.0-4143075669&partnerID=MN8TOARS
Contributors: R. Samanta, R. Heath Jr. & B. Evans
Source: ORCID
Added: September 11, 2020
2003 conference paper
Limited Feedback Precoding for Spatial Multiplexing Systems
GLOBECOM - IEEE Global Telecommunications Conference, 4, 1857–1861. http://www.scopus.com/inward/record.url?eid=2-s2.0-0842310888&partnerID=MN8TOARS
Contributors: D. Love & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2003 conference paper
Limited feedback precoding for spatial multiplexing systems using linear receivers
Proceedings - IEEE Military Communications Conference MILCOM, 1, 627–632. http://www.scopus.com/inward/record.url?eid=2-s2.0-3142719862&partnerID=MN8TOARS
Contributors: D. Love & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2003 conference paper
Limiting Queueing Models for Scheduling in Multi-user MIMO Wireless Systems
Proceedings of the Second IASTED International Conference on Communications, Internet, and Information Technology, 418–423. http://www.scopus.com/inward/record.url?eid=2-s2.0-1542433943&partnerID=MN8TOARS
Contributors: M. Airy, S. Shakkottai & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2003 conference paper
Optimal CDMA signature sequences, inverse eigenvalue problems and alternating minimization
IEEE International Symposium on Information Theory - Proceedings. http://www.scopus.com/inward/record.url?eid=2-s2.0-0141938660&partnerID=MN8TOARS
Contributors: J. Tropp, R. Heath Jr. & T. Strohmer
Source: ORCID
Added: September 11, 2020
2003 conference paper
Physical layer characterization of smart-antenna equipped mobile ad-hoc network nodes in an urban environment
Proceedings - IEEE Military Communications Conference MILCOM, 2, 1376–1381. http://www.scopus.com/inward/record.url?eid=2-s2.0-3142717651&partnerID=MN8TOARS
Contributors: K. Dandekar & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2003 journal article
Spatial multiplexing in correlated fading via the virtual channel representation
IEEE Journal on Selected Areas in Communications, 21(5), 856–866.
Contributors: Z. Hong*, K. Liu *, R. Heath Jr. & A. Sayeed *
author keywords: beamforming; correlated channels; diversity; precoding; space-time coding; spatial multiplexing; virtual channel representation
TL;DR:
This paper studies the design and performance of spatial multiplexing techniques based on a virtual representation of realistic MIMO fading channels and proposes nonunitary precoding techniques to exploit channel structure when channel statistics are known at the transmitter.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2003 conference paper
Spatially greedy scheduling in multi-user MIMO wireless systems
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 1, 982–986. http://www.scopus.com/inward/record.url?eid=2-s2.0-4143137960&partnerID=MN8TOARS
Contributors: M. Airy, S. Shakkottai & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2003 conference paper
Student generated course demos
Proceedings - Frontiers in Education Conference, FIE, 2, F1B13-F1B18.
Source: ORCID
Added: September 11, 2020
2003 conference paper
Student generated course demos
Proceedings - Frontiers in Education Conference, 2. http://www.scopus.com/inward/record.url?eid=2-s2.0-1642560926&partnerID=MN8TOARS
Contributors: R. Heath Jr. & K. Schmidt
Source: ORCID
Added: September 11, 2020
2002 journal article
Adaptive modulation and MIMO coding for broadband wireless data networks
IEEE Communications Magazine, 40(6), 108–115.
Contributors: S. Catreux, V. Erceg, D. Gesbert* & R. Heath Jr.
TL;DR:
An overview of the challenges and promises of link adaptation in future broadband wireless networks is given and guidelines to help in the design of robust, complexity/cost-effective algorithms for these future wireless networks are suggested.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2002 conference paper
An unequal error protection scheme for multiple input multiple output systems
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 1, 575–579. http://www.scopus.com/inward/record.url?eid=2-s2.0-0037628345&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2002 journal article
Blind channel identification and equalization in OFDM-based multiantenna systems
IEEE Transactions on Signal Processing, 50(1), 96–109.
Contributors: H. Bölcskei*, R. Heath Jr. & A. Paulraj*
author keywords: blind equalization; cyclostationarity; MIMO; multiantenna systems; OFDM
TL;DR:
An algorithm for blind channel identification and equalization in OFDM-based multiantenna systems is introduced that requires only an upper bound on the channel order, does not impose restrictions on channel zeros, and exhibits low sensitivity to stationary noise.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2002 journal article
Capacity maximizing linear space-time codes
IEICE Transactions on Electronics, E85-C(3), 428–435. http://www.scopus.com/inward/record.url?eid=2-s2.0-0036504868&partnerID=MN8TOARS
Contributors: R. Heath Jr. & A. Paulraj
Source: ORCID
Added: September 11, 2020
2002 conference paper
Equal gain transmission in multiple-input multiple-output wireless systems
Conference Record / IEEE Global Telecommunications Conference, 2, 1124–1128. http://www.scopus.com/inward/record.url?eid=2-s2.0-0036970266&partnerID=MN8TOARS
Contributors: D. Love & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2002 journal article
Linear dispersion codes for MIMO systems based on frame theory
IEEE Transactions on Signal Processing, 50(10), 2429–2441.
Contributors: R. Heath Jr. & A. Paulraj
author keywords: diversity methods; MIMO systems; smart antennas; space-time codes
TL;DR:
This paper presents a new linear dispersion code design for MIMO Rayleigh fading channels that bridges the gap between multiplexing and diversity and yields codes that typically perform well both in terms of ergodic capacity as well as error probability.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2002 conference paper
Link adaptation and channel prediction in wireless OFDM systems
Midwest Symposium on Circuits and Systems, 3. http://www.scopus.com/inward/record.url?eid=2-s2.0-0036979356&partnerID=MN8TOARS
Contributors: A. Forenza & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2002 journal article
Modelling realistic electromagnetic effects on MIMO system capacity
Electronics Letters, 38(25), 1624–1625.
Contributors: K. Dandekar * & R. Heath Jr.
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2002 conference paper
Multiple-input multiple-output wireless communication systems using antenna pattern diversity
Conference Record / IEEE Global Telecommunications Conference, 1, 997–1001. http://www.scopus.com/inward/record.url?eid=2-s2.0-0036969611&partnerID=MN8TOARS
Contributors: L. Dong, H. Ling & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
2002 conference paper
On performance of the zero forcing receiver in presence of transmit correlation
IEEE International Symposium on Information Theory - Proceedings. http://www.scopus.com/inward/record.url?eid=2-s2.0-0036350972&partnerID=MN8TOARS
Contributors: D. Gore, R. Heath Jr. & A. Paulraj
Source: ORCID
Added: September 11, 2020
2002 conference paper
On the design of optimal spreading sequences for CDMA systems
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 2, 1434–1438. http://www.scopus.com/inward/record.url?eid=2-s2.0-0037967846&partnerID=MN8TOARS
Contributors: T. Strohmer, R. Heath Jr. & A. Paulraj
Source: ORCID
Added: September 11, 2020
2002 conference paper
Quantized maximum ratio transmission for multiple-input multiple-output wireless systems
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 1, 531–535. http://www.scopus.com/inward/record.url?eid=2-s2.0-0037628394&partnerID=MN8TOARS
Contributors: D. Love, R. Heath Jr. & T. Strohmer
Source: ORCID
Added: September 11, 2020
2002 conference paper
Statistical antenna selection for spatial multiplexing systems
IEEE International Conference on Communications, 1, 450–454. http://www.scopus.com/inward/record.url?eid=2-s2.0-0036279597&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2002 journal article
Transmit selection in spatial multiplexing systems
IEEE Communications Letters, 6(11), 491–493.
Contributors: D. Gore, R. Heath Jr. & A. Paulraj
Source: ORCID
Added: September 11, 2020
2001 conference paper
Antenna selection for spatial multiplexing systems based on minimum error rate
IEEE International Conference on Communications, 7, 2276–2280. http://www.scopus.com/inward/record.url?eid=2-s2.0-0034858272&partnerID=MN8TOARS
Contributors: H. R.W. & A. Paulraj
Source: ORCID
Added: September 11, 2020
2001 journal article
Antenna selection for spatial multiplexing systems with linear receivers
IEEE Communications Letters, 5(4), 142–144.
Contributors: R. Heath Jr., S. Sandhu & A. Paulraj
author keywords: diversity methods; MIMO systems; modulation; smart antennas
TL;DR:
A criterion for selecting the optimal antenna subset when linear, coherent receivers are used over a slowly varying channel and use of the post-processing SNRs of the multiplexed streams whereby the antenna subset that induces the largest minimum SNR is chosen.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2001 conference paper
Characterization of MIMO channels for spatial multiplexing systems
IEEE International Conference on Communications, 2, 591–595. http://www.scopus.com/inward/record.url?eid=2-s2.0-0034858475&partnerID=MN8TOARS
Contributors: H. R.W. & A. Paulraj
Source: ORCID
Added: September 11, 2020
2001 journal article
Multiuser diversity for MIMO wireless systems with linear receivers
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 2, 1194–1199.
TL;DR:
This paper considers the problem of exploiting multiuser diversity in MIMO systems, especially those with zero forcing linear receivers and proposes a number of different scheduling disciplines and compares them in terms of average throughput as a function of the number of users and number of antennas.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2001 conference paper
Space-time block codes versus space-time trellis codes
IEEE International Conference on Communications, 4, 1132–1136. http://www.scopus.com/inward/record.url?eid=2-s2.0-0034864028&partnerID=MN8TOARS
Source: ORCID
Added: September 11, 2020
2001 conference paper
Space-time signaling and frame theory
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 4, 2445–2448. http://www.scopus.com/inward/record.url?eid=2-s2.0-0034854232&partnerID=MN8TOARS
Contributors: H. R.W., Bölcskei & A. Paulraj
Source: ORCID
Added: September 11, 2020
2000 conference paper
Blind equalization in OFDM-based multi-antenna systems
IEEE 2000 Adaptive Systems for Signal Processing, Communications, and Control Symposium, AS-SPCC 2000, 58–63.
TL;DR:
This work introduces an algorithm for blind channel identification and equalization in OFDM-based multi-antenna systems that employs nonredundant antenna precoding, uses second-order cyclostationary statistics, and yields unique estimates.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
2000 journal article
Blind identification of multichannel FIR blurs and perfect image restoration
IEEE Transactions on Image Processing, 9(11), 1877–1896.
Contributors: G. Giannakis* & R. Heath Jr.
author keywords: blind blur estimation; blind image restoration; multichannel image restoration
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: September 11, 2020
2000 conference paper
Coordinated training and transmission for improved interference cancellation in a cellular network
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 2, 939–945. http://www.scopus.com/inward/record.url?eid=2-s2.0-0034445376&partnerID=MN8TOARS
Contributors: H. R.W., J. Tellado, S. Peroor & A. Paulraj
Source: ORCID
Added: September 11, 2020
1999 conference paper
Blind channel estimation in spatial multiplexing systems using nonredundant antenna precoding
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 2, 1127–1132. http://www.scopus.com/inward/record.url?eid=2-s2.0-0033334140&partnerID=MN8TOARS
Contributors: H. Bolcskei, R. Heath Jr. & A. Paulraj
Source: ORCID
Added: September 11, 2020
1999 journal article
Exploiting Input Cyclostationarity for Blind Channel Identification in OFDM Systems
IEEE Transactions on Signal Processing, 47(3), 848–856.
TL;DR:
A novel subspace approach for blind channel identification using cyclic correlations at the OFDM receiver and Simulations of the proposed channel estimator along with its performance in OFDM systems combined with impulse response shortening and Reed-Solomon coding are presented.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
1999 conference paper
Multiple antenna arrays for transmitter diversity and space-time coding
IEEE International Conference on Communications, 1, 36–40. http://www.scopus.com/inward/record.url?eid=2-s2.0-0003084778&partnerID=MN8TOARS
Contributors: R. Heath Jr. & A. Paulraj
Source: ORCID
Added: September 11, 2020
1999 conference paper
Transmit diversity using decision-directed antenna hopping
1999 IEEE Communications Theory Mini-Conference - Conference Record, 141–145.
TL;DR:
Decision-directed antenna hopping is proposed where the antenna selected for transmission is a function of the current and past data and enables diversity gain without constellation expansion, bandwidth expansion, of interleaving, similar in spirit to space-time trellis codes.
(via Semantic Scholar)
Source: ORCID
Added: September 11, 2020
1998 journal article
Exploiting input cyclostationarity for blind channel identification in OFDM systems
IEEE Transactions on Signal Processing, 46(2). http://www.scopus.com/inward/record.url?eid=2-s2.0-33747807667&partnerID=MN8TOARS
Contributors: R. Heath Jr. & G. Giannakis
Source: ORCID
Added: September 11, 2020
1998 conference paper
Simple scheme for transmit diversity using partial channel feedback
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 2, 1073–1078. http://www.scopus.com/inward/record.url?eid=2-s2.0-0032260864&partnerID=MN8TOARS
Contributors: R. Heath Jr. & A. Paulraj
Source: ORCID
Added: September 11, 2020
1997 conference paper
Adaptive blind channel identification of FIR channels for Viterbi decoding
Conference Record of the Asilomar Conference on Signals, Systems and Computers, 1, 320–324. http://www.scopus.com/inward/record.url?eid=2-s2.0-0030646382&partnerID=MN8TOARS
Contributors: R. Heath Jr., S. Halford & G. Giannakis
Source: ORCID
Added: September 11, 2020
1997 conference paper
Blind channel identification for multirate precoding and OFDM systems
International Conference on Digital Signal Processing, DSP, 1, 383–386. http://www.scopus.com/inward/record.url?eid=2-s2.0-0031344737&partnerID=MN8TOARS
Contributors: R. Heath Jr. & G. Giannakis
Source: ORCID
Added: September 11, 2020
1996 conference paper
Blind identification of multichannel FIR blurs and perfect image restoration
IEEE International Conference on Image Processing, 1, 717–720. http://www.scopus.com/inward/record.url?eid=2-s2.0-0030395870&partnerID=MN8TOARS
Contributors: G. Giannakis & R. Heath Jr.
Source: ORCID
Added: September 11, 2020
Employment
Updated: March 18th, 2024 19:14
2024 - present
University of California, San Diego La Jolla, CA, US
Charles Lee Powell Chair in Wireless Communication
Electrical an d Computer Engineering
2020 - 2023
North Carolina State University Raleigh, NC, US
Lampe Distinguished Professor
Electrical and Computer Engineering
2001 - 2020
The University of Texas at Austin Austin, TX, US
Cockrell Family Regents Chair in Engineering
Electrical and Computer Engineering
Education
Updated: October 30th, 2015 20:46
1997 - 2001
Stanford University Stanford, CA, US
Ph.D.
Electrical Engineering
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