Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/483283
Title: Compress-Forward coding with BPSK modulation for the half-duplex Gaussian relay channel
Authors: Uppal, Momin;Liu, Zhixin;Stanković, Vladimir;Xiong, Zixiang
subject: BPSK modulation;Compress-forward;Distributed joint source-channel coding;Relay channel;Wyner-Ziv coding
Year: 2009
Publisher: Ieee
Abstract: This paper studies compress-forward (CF) coding with BPSK modulation for the half-duplex Gaussian relay channel. In CF relaying, Wyner-Ziv coding is applied at the relay to exploit the joint statistics between signals at the relay and the destination. We propose Slepian-Wolf coded nested scalar quantization (SWCNSQ) for practical Wyner-Ziv coding at the relay. We first provide the achievable rate of SWCNSQ based CF relaying as a performance benchmark, and then present a practical code design using low-density parity-check (LDPC) codes for error protection at the source, and nested scalar quantization plus irregular-repeat accumulation (IRA) codes for CF coding at the relay. The degree distributions of the LDPC and IRA codes are optimized using extrinsic information transfer charts and Gaussian approximation. Under discretized density evolution for asymptotically large block lengths, our optimized code design operates 0.11-0.21 dB away from the SWCNSQ limit for CF relaying. Simulations with LDPC/IRA codes of length 2 times 10<sup>5</sup> bits show a performance gap of 0.27-0.38 dB from the achievable rate.
Description: 
URI: http://localhost/handle/Hannan/320099
http://localhost/handle/Hannan/483283
Appears in Collections:2009

Files in This Item:
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AL1543810.pdf1.73 MBAdobe PDF
Title: Compress-Forward coding with BPSK modulation for the half-duplex Gaussian relay channel
Authors: Uppal, Momin;Liu, Zhixin;Stanković, Vladimir;Xiong, Zixiang
subject: BPSK modulation;Compress-forward;Distributed joint source-channel coding;Relay channel;Wyner-Ziv coding
Year: 2009
Publisher: Ieee
Abstract: This paper studies compress-forward (CF) coding with BPSK modulation for the half-duplex Gaussian relay channel. In CF relaying, Wyner-Ziv coding is applied at the relay to exploit the joint statistics between signals at the relay and the destination. We propose Slepian-Wolf coded nested scalar quantization (SWCNSQ) for practical Wyner-Ziv coding at the relay. We first provide the achievable rate of SWCNSQ based CF relaying as a performance benchmark, and then present a practical code design using low-density parity-check (LDPC) codes for error protection at the source, and nested scalar quantization plus irregular-repeat accumulation (IRA) codes for CF coding at the relay. The degree distributions of the LDPC and IRA codes are optimized using extrinsic information transfer charts and Gaussian approximation. Under discretized density evolution for asymptotically large block lengths, our optimized code design operates 0.11-0.21 dB away from the SWCNSQ limit for CF relaying. Simulations with LDPC/IRA codes of length 2 times 10<sup>5</sup> bits show a performance gap of 0.27-0.38 dB from the achievable rate.
Description: 
URI: http://localhost/handle/Hannan/320099
http://localhost/handle/Hannan/483283
Appears in Collections:2009

Files in This Item:
File SizeFormat 
AL1543810.pdf1.73 MBAdobe PDF
Title: Compress-Forward coding with BPSK modulation for the half-duplex Gaussian relay channel
Authors: Uppal, Momin;Liu, Zhixin;Stanković, Vladimir;Xiong, Zixiang
subject: BPSK modulation;Compress-forward;Distributed joint source-channel coding;Relay channel;Wyner-Ziv coding
Year: 2009
Publisher: Ieee
Abstract: This paper studies compress-forward (CF) coding with BPSK modulation for the half-duplex Gaussian relay channel. In CF relaying, Wyner-Ziv coding is applied at the relay to exploit the joint statistics between signals at the relay and the destination. We propose Slepian-Wolf coded nested scalar quantization (SWCNSQ) for practical Wyner-Ziv coding at the relay. We first provide the achievable rate of SWCNSQ based CF relaying as a performance benchmark, and then present a practical code design using low-density parity-check (LDPC) codes for error protection at the source, and nested scalar quantization plus irregular-repeat accumulation (IRA) codes for CF coding at the relay. The degree distributions of the LDPC and IRA codes are optimized using extrinsic information transfer charts and Gaussian approximation. Under discretized density evolution for asymptotically large block lengths, our optimized code design operates 0.11-0.21 dB away from the SWCNSQ limit for CF relaying. Simulations with LDPC/IRA codes of length 2 times 10<sup>5</sup> bits show a performance gap of 0.27-0.38 dB from the achievable rate.
Description: 
URI: http://localhost/handle/Hannan/320099
http://localhost/handle/Hannan/483283
Appears in Collections:2009

Files in This Item:
File SizeFormat 
AL1543810.pdf1.73 MBAdobe PDF