Works Published in 2005
Displaying works 41 - 60 of 321 in total
Sorted by most recent date added to the index first, which may not be the same as publication date order.
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
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 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
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
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 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
citeseerx.ist.psu.edu (repository)
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
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 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 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
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
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
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 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
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
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
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
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
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
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