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Soft-decision COVQ for Rayleigh-fading channels
1998
IEEE Communications Letters
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A channel-optimized vector quantizer (COVQ) scheme that exploits the channel soft-decision information is proposed. ...
The scheme is designed for stationary memoryless Gaussian and Gauss-Markov sources transmitted over BPSKmodulated Rayleigh-fading channels. ...
More specifically, we propose a channel-optimized vector quantizer (COVQ) [5] , [3] for independent (fully interleaved) Rayleigh-fading channels with soft-decision binary phase-shift keying (BPSK) modulation ...
doi:10.1109/4234.681359
fatcat:bea3doo3pvhy7ojdegjeshgcdq
Soft-decision COVQ for turbo-coded AWGN and Rayleigh fading channels
2001
IEEE Communications Letters
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A robust soft-decision channel-optimized vector quantization (COVQ) scheme for Turbo-coded additive white Gaussian noise (AWGN) and Rayleigh fading channels is proposed. ...
Index Terms-AWGN channels, channel-optimized vector quantization, joint source-channel coding, Rayleigh fading channels, soft-decision demodulator, turbo codes. ...
In this work, we design and implement a robust soft-decision channel-optimized vector quantization (COVQ) scheme for Turbo-coded AWGN channels and Rayleigh fading channels with known side information. ...
doi:10.1109/4234.929605
fatcat:fnfm4e2ourento4ni2efbbgqwi
Exploiting memory and soft-decision information in channel optimized quantization for correlated fading channels
2011
2011 12th Canadian Workshop on Information Theory
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Signal-to-distortion gains of up to 2.3 dB are obtained for only 2 bits of soft-decision quantization over COVQ schemes designed for a hard-decision (q = 1) demodulated channel. ...
Finally, the queue-based noise model is validated as an effective approximation of correlated fading channels by testing a COVQ trained using this model over the Rayleigh fading channel. ...
ACKNOWLEDGMENT The authors would like to thank Cecilio Pimentel and Pedro Melo for providing the DFC simulation code. ...
doi:10.1109/cwit.2011.5872125
fatcat:ol6lqcio2zda7dcylc4cssovk4
COVQ for MAP hard-decision demodulated channels
2009
IEEE Communications Letters
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Our scheme has less encoding computational and storage complexity (particularly for noisy channel conditions) than both conventional and soft-decision COVQ systems, which use hard-decision and soft-decision ...
We design a channel optimized vector quantizer (COVQ) for symbol-by-symbol maximum a posteriori (MAP) hard-decision demodulated channels. ...
The conventional COVQ [5] and the soft-decision demodulation (SDD) COVQ [1] , [2] and [6] (in which the channel soft-decision information is used) are based on maximum Manuscript likelihood ( ...
doi:10.1109/lcomm.2009.081457
fatcat:vz7r5lpso5cpddp5xeljuvocs4
Improved transmission of vector quantized data over noisy channels
2006
Neural computing & applications (Print)
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For AWGN and fading channels, the distortion of the proposed approach is comparable to that of COVQ. ...
A soft decoding self-organizing map (SOM) approach for VQ over noisy channels is presented. Compared with the COVQ approach, it does not require a long training time. ...
Two channel models are considered. They are AWGN and independent Rayleigh fading channel. In the fading channel, the estimated fading factor is assumed to be available at the receiver. ...
doi:10.1007/s00521-006-0073-7
fatcat:fmfaqdeforhndizvnsux7y7xfy
Soft-decision demodulation design for COVQ over white, colored, and ISI Gaussian channels
2000
IEEE Transactions on Communications
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In this work, the design of a -bit (scalar and vector) soft-decision demodulator for Gaussian channels with binary phase-shift keying modulation is investigated. ...
The demodulator is used in conjunction with a soft-decision channel-optimized vector quantization (COVQ) system. ...
In previous related work, the authors presented a similar soft-decision COVQ system for memoryless Rayleigh fading channels in [1] . ...
doi:10.1109/26.870017
fatcat:74zk3odo5zdr7gn4duip3r2xve
Quantiser design for AWGN and Rayleigh fading BPSK channels with soft output decoding
2004
IEE Proceedings - Communications
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A new method of combined source-channel coding for the scalar quantisation of a discrete memoryless source is presented that takes advantage of the channel soft output values produced by the demodulator ...
The case of transmitting a memoryless Gaussian source using binary phase shift keying (BPSK) modulation over over an additive white Gaussian noise (AWGN) channel with and without Rayleigh fading is studied ...
an AWGN channel with and without Rayleigh fading. ...
doi:10.1049/ip-com:20040548
fatcat:k26mdnvsubaglhq4ce5uqcn5fm
MAP Detection and Robust Lossy Coding Over Soft-Decision Correlated Fading Channels
2013
IEEE Transactions on Vehicular Technology
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The joint source-channel coding (JSCC) problem for soft-decision-demodulated time-correlated fading channels is investigated without the use of channel coding and interleaving. ...
(SQ), soft-decision demodulation. ...
Rayleigh fading channel. ...
doi:10.1109/tvt.2013.2252213
fatcat:4at3yi5bsndwfkj23crjuea3lq
Joint design of fixed-rate source codes and multiresolution channel codes
1998
IEEE Transactions on Communications
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The joint designs use channel-optimized vector quantization (COVQ) for the source code and rate-compatible punctured convolutional (RCPC) coding for the channel code. ...
The optimal bit allocation reduces distortion by up to 6 dB over suboptimal allocations and by up to 4 dB relative to standard COVQ for the source data set considered. ...
ACKNOWLEDGMENT The authors gratefully acknowledge the anonymous reviewers for their detailed critiques. Their comments and suggestions helped to greatly improve the clarity of the paper. ...
doi:10.1109/26.725308
fatcat:veraa557dnb45a7wx5qzgen6ma
Optimal And Sub-Optimal Decoding For Vector Quantization Over Noisy Channels With Memory
1998
Zenodo
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Such decoding was studied for the AWGN channel in [5, 6, 8, 11] , and for Rayleigh fading channels in [7, 9, 11] . ...
Table 1 : 1 COVQ performance (SNR in dB) over channel 1. Results for rate 2, 1 and 0.5, 4-dimensional VQ for Gauss-Markov and iid Gaussian sources, for soft and Viterbi decoding. ...
doi:10.5281/zenodo.36892
fatcat:mlagwldya5h6npfojkatqlaxze
Receiver-only optimized Vector Quantization for fading channels
2010
2010 National Conference On Communications (NCC)
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Theoretical expressions for an upper and lower bound on the WMSE performance of the system with the receive filter and a Rayleigh flat fading channel are derived. ...
The distortion performance is analyzed for weighted mean square error (WMSE) and the optimum receive filter that minimizes the expected distortion is derived for two different cases of fading. ...
In [6] , the author proposes a COVQ that exploits the channel soft-decision information for Rayleigh fading channels. ...
doi:10.1109/ncc.2010.5430183
fatcat:6fvbmb3by5g55gx5q3ru6ibhjq
Hadamard-based soft decoding for vector quantization over noisy channels
1999
IEEE Transactions on Information Theory
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We present an estimator-based, or soft, vector quantizer decoder for communication over a noisy channel. ...
Index terms: vector quantization, combined source{channel coding, noisy channels, estimation, soft decoding, index assignment. 1 We will use the acronym \VQ" to mean, interchangeably, \vector quantization ...
Similarly, for the RAB channel we have the following corollary: Corollary 2 (The Rayleigh-amplitude binary channel) For the Rayleigh-amplitude binary channel we haveX(r) = Tĥ(r) withĥ(r) = fm T hp (r)g ...
doi:10.1109/18.749000
fatcat:ajp5vhcgdzfbxp7cffh7pmp6je
Optimum linear decoding of vector quantisation transmitted over a CDMA channel
2007
IET Communications
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The problem of joint source -channel and multiuser decoding for code division multiple access channels is considered. The block source -channel encoder is defined by a vector quantiser (VQ). ...
The optimum linear decoder is soft in the sense that it utilises all the soft information available at the receiver. ...
Such decoding was studied for the additive white Gaussian noise (AWGN) channel in [3, 8 -10] and for Rayleigh-fading channels in [10 -12] . ...
doi:10.1049/iet-com:20060071
fatcat:koojjyetsvhbfnc2ojag4kvf6u
Joint design of fixed-rate source codes and UEP channel codes for fading channels
Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)
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W e consider both hard-decision and soft-decision decoding f o T these channel codes. ...
W e study a n iterative design algorithm that jointly optimizes source and channel codes f o r image transmission over Rayleigh fading channels. ...
There has been some recent work on modifying COVQ so that its inherent channel code uses soft-decision decoding. This design algorithm is called Soft-Decision COVQ (SD-COVQ). ...
doi:10.1109/acssc.1998.750834
fatcat:cyvzo4fyqzgwdooj33gxh35m4a
Joint design of vector quantizers and RCPC channel codes for Rayleigh fading channels
Globecom '00 - IEEE. Global Telecommunications Conference. Conference Record (Cat. No.00CH37137)
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We consider both hard-decision and soft-decision decoding for the channel codes. In both designs the bit allocation between the source and channel codes is optimized. ...
We study the performance of joint source and channel codes designed to minimize end-to-end distortion over a Rayleigh fading channel. We consider two joint code designs. ...
These joint designs use vector quantization (VQ) for the source code and RCPC coding for the channel code with either hard decision (HD) or soft decision (SD) decoding. ...
doi:10.1109/glocom.2000.891910
dblp:conf/globecom/ShenGE00
fatcat:es2rqjpqyzfstckyxzexvbt6eu
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