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Joint design of vector quantizers and RCPC channel codes for Rayleigh fading channels

Shen, Yirong and Goldsmith, Andrea J. and Effros, Michelle (2000) Joint design of vector quantizers and RCPC channel codes for Rayleigh fading channels. In: IEEE Global Telecommunications Conference (GLOBECOM '00), San Francisco, CA, 27 November-1 December 2000. Vol.3. IEEE , Piscataway, NJ, pp. 1611-1615. ISBN 0-7803-6451-1 http://resolver.caltech.edu/CaltechAUTHORS:SHEglobecom00

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Abstract

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. The first joint code uses a sequential design: a standard vector quantizer (VQ) source code is designed for a perfect channel (noiseless and distortionless) and then an RCPC channel code is optimized relative to the VQ and the channel statistics. The second design jointly optimizes a channel optimized VQ (COVQ) and an RCPC channel code through an iterative design process. 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. At this optimal bit allocation, the performance of the iterative joint design and the simpler sequential design are nearly the same over the range of SNR values that we considered. Both code designs outperform standard COVQ and by up to 6 dB, and this performance improvement is most pronounced at low SNRs.


Item Type:Book Section
Additional Information:© Copyright 2000 IEEE. Reprinted with permission. The work of Y. Shen was partially supported by the Stanford summer undergraduate research program.
Subject Keywords:AWGN channels, Rayleigh channels, combined source-channel coding, iterative methods, vector quantization, network information theory, channel capacities
Record Number:CaltechAUTHORS:SHEglobecom00
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SHEglobecom00
Alternative URL:http://dx.doi.org/10.1109/GLOCOM.2000.891910
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7433
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:13 Feb 2007
Last Modified:26 Dec 2012 09:31

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