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Works (36)
Updated: April 5th, 2024 01:07
2023 journal article
A Principal-Component Approach to Antenna Impedance Estimation at MISO Receivers
IEEE COMMUNICATIONS LETTERS, 27(1), 288–292.
author keywords: Impedance; Maximum likelihood estimation; Receiving antennas; Training; MISO communication; Antennas; Transmitting antennas; Antenna impedance estimation; maximum-likelihood estimator; eigen-decomposition
TL;DR:
This letter study at MISO receivers over Rayleigh fading channels and derive the optimal ML estimator in closed-form, suggesting a computationally efficient, principal-components approach that estimates antenna impedance in real-time and shows sizable improvement against a reference estimator at low SNR.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation
(Web of Science)
7. Affordable and Clean Energy
(Web of Science; OpenAlex)
Sources: Web Of Science, ORCID
Added: November 4, 2022
2018 article
Training-Based Joint Channel and Antenna Impedance Estimation
2018 52ND ANNUAL CONFERENCE ON INFORMATION SCIENCES AND SYSTEMS (CISS).
author keywords: Channel Estimation; Impedance Estimation; Maximum-Likelihood Estimation; Training Sequences
TL;DR:
It is suggested that antenna impedance can be accurately estimated, in exchange for a small, controlled increase in channel estimation error, and maximum-likelihood estimators for the channel and impedance are derived.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being
(Web of Science)
Sources: Web Of Science, ORCID
Added: August 6, 2018
2017 article
Enhancing Capacity in Compact MIMO-OFDM Systems With Frequency-Selective Matching
Kundu, L., & Hughes, B. L. (2017, November). IEEE TRANSACTIONS ON COMMUNICATIONS, Vol. 65, pp. 4694–4703.
author keywords: MIMO; OFDM; mutual coupling; antenna matching; channel capacity; compact receivers; arrays
TL;DR:
The results suggest that frequency-selective matching can significantly increase capacity in the presence of strong coupling, and can be achieved by a simple class of matching networks that are easily realized in hardware.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2013 journal article
Diversity Limits of Compact Broadband Multi-Antenna Systems
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 31(2), 326–337.
author keywords: multiple antennas; mutual coupling; broadband matching; MIMO; OFDM
TL;DR:
It will be shown that mutual coupling creates eigen-modes (virtual antennas) with diverse frequency responses, using the standard matching techniques, and how common communications techniques such as Diversity-OFDM would need to be optimized in order to compensate for these effects.
(via Semantic Scholar)
arxiv.org (repository)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2012 journal article
Demonstration of communication using neutrinos
Modern Physics Letters A, 27(12).
Source: NC State University Libraries
Added: August 6, 2018
2012 journal article
Front-End Design for Compact MIMO Receivers: A Communication Theory Perspective
IEEE TRANSACTIONS ON COMMUNICATIONS, 60(10), 2938–2949.
author keywords: MIMO; antenna arrays; noise figure; receivers; channel capacity
TL;DR:
MIMO low-noise design principles from a communication theory perspective are developed by deriving generalizations of SNR and noise factor from various MIMO communication schemes and one result is able to derive optimal matching networks for a bank of uncoupled amplifiers.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2012 conference paper
Fundamental capacity limits on compact MIMO-OFDM systems
2012 ieee international conference on communications (icc), 2547–2552.
TL;DR:
Shannon's information theory and Fano's broadband matching theory are used to develop optimal transceiver designs for a compact broadband MIMO system and it will be shown that in the presence of channel state information, optimal transmit power allocation and matching characteristic follow a mutual space-frequency water-pouring solution.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation
(OpenAlex)
Source: NC State University Libraries
Added: August 6, 2018
2012 journal article
Optimal Antenna Selection Designs for Coupled MIMO Systems
INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION, 2012.
TL;DR:
It is shown that the presence of inactive antennas can profoundly alter system performance when the antennas are strongly coupled, and a new antenna selection technique is proposed that seeks to exploit coupling to improve performance.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2012 conference paper
communication theory perspective on antenna selection for compact transceivers
2012 ieee international conference on communications (icc).
TL;DR:
This work presents a communication-theoretic analysis and design of antenna selection systems for compact transceivers and proposes a simple parasitic antenna selection technique that can significantly outperform traditional selection when coupling is present.
(via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018
2011 conference paper
Bandwidth limitations and broadband matching for coupled multi-antenna systems
2011 ieee global telecommunications conference (globecom 2011).
TL;DR:
It will be shown that in the presence of coupling, the spatial modes of an antenna array have different bandwidths and that for 2-element arrays with practical bandwidths, a quarter-wavelength spacing is good enough.
(via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018
2010 conference paper
5 mbps optical wireless communication with error correction coding for underwater sensor nodes
Oceans 2010.
TL;DR:
A small, low-cost platform to demonstrate the potential of an optical wireless communications interface for underwater sensor nodes is demonstrated and to enhance the reliability and robustness of the optical wireless communication digital signal processing and error correction techniques are used.
(via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018
2010 conference paper
A MEMS Blue/Green retroreflecting modulator for underwater optical communications
Oceans 2010.
UN Sustainable Development Goal Categories
14. Life Below Water
(OpenAlex)
Source: NC State University Libraries
Added: August 6, 2018
2010 conference paper
Information theoretic optimal broadband matching for communication systems
2010 ieee global telecommunications conference globecom 2010.
TL;DR:
This work derives the optimal capacity and matching network characteristic for a broadband system from an information theoretic view point while incorporating the broadband matching limitations and proposes an iterative algorithm to arrive at the optimal solution.
(via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018
2010 journal article
Noise Correlation in Compact Diversity Receivers
IEEE TRANSACTIONS ON COMMUNICATIONS, 58(5), 1426–1436.
author keywords: Antenna arrays; mutual coupling; noise; receivers; diversity methods
TL;DR:
This model shows that noise in a compact diversity receiver may be spatially correlated, and expresses relating noise correlation to properties of the antennas and amplifiers are derived and its impact on the outage probability of an optimal diversity combiner is studied.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2009 journal article
Analysis on the Diversity-Multiplexing Tradeoff for Ordered MIMO SIC Receivers
IEEE TRANSACTIONS ON COMMUNICATIONS, 57(1), 125–133.
author keywords: Diversity-multiplexing tradeoff; multiple access channels; ordered SIC receiver; SDMA; V-BLAST
TL;DR:
This paper rigorously verify that under general settings, the optimal ordering rule for a V-BLAST SIC receiver will not improve its performance regarding diversity-multiplexing tradeoff in point-to- point channels and reveals that when the rates of data streams are fixed, the diversity order is not improved by user ordering.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2009 journal article
Effects of Mutual Coupling and Noise Correlation on Downlink Coordinated Beamforming with Limited Feedback
EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING.
TL;DR:
Numerical results suggest that, even in the presence of strong coupling, most of the benefits of coordinated beamforming can be preserved by using appropriate matching networks and linear beamforming.
(via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018
2008 article
Mutual Coupling Effects in MIMO MRC Systems with Limited Feedback
GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE.
TL;DR:
Numerical results suggest that, regardless of the power measure and matching networks, the benefits of MIMO MRC with limited feedback can be achieved with antennas spaced as close as 0.2 - 0.3 wavelengths apart.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2008 journal article
On the degrees of freedom in linear array systems with tri-polarized antennas
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 7(7), 2458–2462.
author keywords: MIMO; polarized antenna; degrees of freedom
TL;DR:
It is concluded that linear arrays of tri-polarized dipole antennas employed at the transmit and receive end of a MIMO system can achieve a three-fold increase in channel capacity with respect to analogous arrays of linearly polarized antennas.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
16. Peace, Justice and Strong Institutions
(OpenAlex)
Source: Web Of Science
Added: August 6, 2018
2008 article
Optimal Front-End Design for MIMO Receivers
GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE.
TL;DR:
A circuit model for a noisy MIMO receiver front-end that includes arbitrary coupling and noise correlation is presented, and the noise figure for two-port networks is extended to multiport networks, from which theorems for optimal front- end design are derived.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2007 journal article
Increasing channel capacity of an ultrawideband MIMO system using vector antennas
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 55(10), 2880–2887.
author keywords: multiple-input multiple-output (MIMO) antenna; multiple-input multiple-output (MIMO) channel capacity; ultrawideband (UWB) antenna; vector antenna
TL;DR:
Channel capacity calculations performed with the antenna operating in a rich scattering environment show that spectral efficiency of the UWB vector antenna system approaches that of the traditional spatial array.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Web Of Science
Added: August 6, 2018
2006 article
On the diversity order of spatial multiplexing systems with transmit antenna selection: A geometrical approach
Zhang, H., Dai, H., Zhou, Q., & Hughes, B. L. (2006, December). IEEE TRANSACTIONS ON INFORMATION THEORY, Vol. 52, pp. 5297–5311.
author keywords: antenna selection; diversity order; diversity and multiplexing tradeoff; multiple-input-multiple-output (MIMO); spatial multiplexing
TL;DR:
A geometrical framework is proposed to theoretically analyze the diversity order achieved by transmit antenna selection for separately encoded spatial multiplexing systems with linear and decision-feedback receivers.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2006 conference paper
On the diversity-multiplexing Tradeoff for ordered SIC receivers over MIMO channels
2006 ieee international conference on communications, vols 1-12, 1368–1373.
TL;DR:
It is proved that under general settings, any ordering rule for a V-BLAST SIC receiver will not improve its performance regarding diversity-multiplexing tradeoff, and it is predicted that the whole tradeoff curve is the same as that of fixed-order detectors.
(via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018
2005 journal article
Increasing wireless channel capacity through MIMO systems employing co-located antennas
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 53(6), 1837–1844.
author keywords: loop antenna; multiple-input multiple-output (MIMO) antenna; vector antenna
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
Source: Web Of Science
Added: August 6, 2018
2005 article
The asymptotic capacity of multiple-antenna Rayleigh-fading channels
Kamath, M. A., & Hughes, B. L. (2005, December). IEEE TRANSACTIONS ON INFORMATION THEORY, Vol. 51, pp. 4325–4333.
author keywords: capacity; fading channels; multiple-antenna communication; random matrix theory; space-time coding
TL;DR:
The asymptotic behavior of the capacity of multiple-antenna Rayleigh-fading channels in the limit is considered, and it is shown that the capacity converges in distribution to a Gaussian random variable, and closed-form formulas for its mean and variance are given.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2004 journal article
Bit-interleaved space-time coded modulation with iterative decoding
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 3(6), 1912–1917.
author keywords: bit-interleaved coded modulation; concatenated codes; iterative decoding; multiantenna communications; space-time coding; trellis codes
TL;DR:
The decoding metric is modified to fit for the iterative process, and the derived error bounds suggest that set-partition labeling instead of gray labeling should be used when considering iterative decoding.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2003 article
Joint channel estimation and data detection in space-time communications
Cozzo, C., & Hughes, B. L. (2003, August). IEEE TRANSACTIONS ON COMMUNICATIONS, Vol. 51, pp. 1266–1270.
author keywords: expectation-maximization (EM) algorithm; fading channels; iterative receivers; joint detection and estimation; space-time coding; transmit diversity
TL;DR:
Simulation results show that the iterative space-time receiver based on the expectation-maximization algorithm can often achieve near-coherent performance with modest complexity and using very few pilot symbols.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2003 article
Optimal space-time constellations from groups
Hughes, B. L. (2003, February). IEEE TRANSACTIONS ON INFORMATION THEORY, Vol. 49, pp. 401–410.
author keywords: constellation design; differential modulation; group codes; multipath channels; noncoherent communication; space-time coding; transmit diversity
TL;DR:
It is shown that all optimal full-rank space-time group codes are unitary (each code matrix has equal-energy, orthogonal rows), which leads to a simpler code design criterion and suggests that unitary codes may play an important role in coherent as well as noncoherent communication.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2003 journal article
Optimizing information efficiency in a direct-sequence mobile packet radio network
IEEE TRANSACTIONS ON COMMUNICATIONS, 51(1), 22–24.
author keywords: direct-sequence modulation; spectral efficiency; spread-spectrum; trellis-coded modulation optimum transmission; ranges
TL;DR:
A new performance measure, information efficiency, is used to analyze the network and it is shown that the information efficiency of the low-cost mobile packet radio network can be improved approximately 20 fold by using the optimum parameters.
(via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018
2003 article
Special Issue on MIMO Wireless Communications
Blum, R. S., Bolcskei, H., Fitz, M. P., Hughes, B., & Paulraj, A. J. (2003, November). IEEE TRANSACTIONS ON SIGNAL PROCESSING, Vol. 51, pp. 2709–2709.
TL;DR:
The present special issue is an attempt to cover a wide range of topics in MIMO wireless by publishing 26 high-quality papers reporting on recent results in the understanding of six different areas of MIMo communication, including understanding the ultimate capacity that MIMM wireless links can provide as well as understanding the performance of M IMO systems.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2002 journal article
An adaptive receiver for space-time trellis codes based on per-survivor processing
IEEE TRANSACTIONS ON COMMUNICATIONS, 50(8), 1213–1216.
author keywords: channel tracking; fading channels; joint detection and estimation; per-survivor processing; space-time coding; transmit diversity
TL;DR:
An adaptive receiver based on per-survivor processing for detecting space-time trellis codes transmitted over time-selective flat-fading channels can outperform iterative approaches based on Kalman filtering and the expectation-maximization algorithm at the cost of increased receiver complexity.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2002 article
Untitled
Al-Dhahir, N., Giannakis, G. B., Hochwald, B., Hughes, B. L., & Marzetta, T. L. (2002, October). IEEE TRANSACTIONS ON SIGNAL PROCESSING, Vol. 50, pp. 2381–2384.
Source: Web Of Science
Added: August 6, 2018
2001 article
Double differential space-time block coding for time-selective fading channels
Liu, Z. Q., Giannakis, G. B., & Hughes, B. L. (2001, September). IEEE TRANSACTIONS ON COMMUNICATIONS, Vol. 49, pp. 1529–1539.
author keywords: differential encoding; diversity methods; group codes; space-time codes; transmit antennas
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2000 journal article
Differential space-time modulation
IEEE Transactions on Information Theory, 46(7), 2567–2578.
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: NC State University Libraries
Added: August 6, 2018
1998 article
Coding and stability in frequency-hop packet radio networks
Murali, R., & Hughes, B. L. (1998, February). IEEE TRANSACTIONS ON COMMUNICATIONS, Vol. 46, pp. 191–199.
author keywords: ALOHA random access; frequency hopping; spread-spectrum multiple-access
TL;DR:
A fully connected radio network is considered in which packets are sent using slow frequency-hop modulation, slotted ALOHA random access, and Reed-Solomon error-control coding, and it is shown that the drift approaches a simple limiting form as the block length becomes large.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
1998 article
Worst-case error probability of a spread-spectrum system in energy-limited interference
Hizlan, M., & Hughes, B. L. (1998, February). IEEE TRANSACTIONS ON COMMUNICATIONS, Vol. 46, pp. 286–296.
author keywords: direct-sequence modulation; robust detection; signal detection; spread-spectrum
TL;DR:
A simple upper bound to the worst-case error probability suffered by a direct sequence communication system with error-correction coding, pseudorandom interleaving, and a correlation receiver is derived.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
1997 journal article
Random access with large propagation delay
IEEE-ACM TRANSACTIONS ON NETWORKING, 5(6), 924–935.
author keywords: forward-error correction; large propagation delay; packet broadcast channel; random access; slotted ALOHA
TL;DR:
A protocol is presented that combines slotted ALOHA random access with the use of forward-error-correction (FEC) across transmitted packets and achieves a higher throughput and lower delay at system equilibrium with no loss in maximum throughput.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
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