Design considerations for iteratively-decoded source-channel coding schemes

Ragnar Thobaben, Jorg Kliewer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Scopus citations

Abstract

We address outer variable-length encoding of a first-order Markov source in a serially concatenated coding scheme with an inner recursive convolutional code. Decoding is carried out iteratively between the constituent decoders for variable-length and convolutional code. While variable-length codes are commonly known to be sensitive to transmission errors, we show that they can lead to significant performance improvements compared to fixed-length source encoding with optimized mappings. Specifically, we propose a simple variablelength code construction with a free distance of two and good compression properties at the same time. Numerical results show that the performance gain of the proposed approach also holds for precoded ISI channels where iterative joint source channel equalization and decoding is employed at the receiver.

Original languageEnglish (US)
Title of host publication44th Annual Allerton Conference on Communication, Control, and Computing 2006
PublisherUniversity of Illinois at Urbana-Champaign, Coordinated Science Laboratory and Department of Computer and Electrical Engineering
Pages1078-1087
Number of pages10
ISBN (Electronic)9781604237924
StatePublished - Jan 1 2006
Externally publishedYes
Event44th Annual Allerton Conference on Communication, Control, and Computing 2006 - Monticello, United States
Duration: Sep 27 2006Sep 29 2006

Publication series

Name44th Annual Allerton Conference on Communication, Control, and Computing 2006
Volume3

Other

Other44th Annual Allerton Conference on Communication, Control, and Computing 2006
CountryUnited States
CityMonticello
Period9/27/069/29/06

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Computer Networks and Communications

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