NDLI: Compress-Forward Coding With BPSK Modulation for the Half-Duplex Gaussian Relay Channel

Content Provider	IEEE Xplore Digital Library
Author	Uppal, M. Zhixin Liu Stankovic, V. Zixiang Xiong
Copyright Year	1991
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 10⁵ bits show a performance gap of 0.27-0.38 dB from the achievable rate.
Sponsorship	IEEE Signal Processing Society
Starting Page	4467
Ending Page	4481
Page Count	15
File Size	1780044
File Format	PDF
ISSN	1053587X
Volume Number	57
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Binary phase shift keying Modulation coding Relays Protective relaying Parity check codes Quantization Statistics Protection Gaussian approximation Design optimization Wyner–Ziv coding BPSK modulation compress-forward distributed joint source-channel coding relay channel
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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