Iterative source-channel decoder using symbol-level extrinsic information

Yen Chang Pan*, Chun Feng Wu, Wen-Whei Chang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

An iterative source-channel decoding scheme which exploits the source residual redundancies on symbol-basis is proposed.We first derive a modified BCJR algorithm based on the sectionalized code trellis for symbol decoding of the convolutional codes. This is used in conjunction with a softbit source decoder that computes the interpolative a posteriori probabilities of quantizer indexes. Simulation results indicate that our proposed scheme can achieve significant improvement over the conventional bit-level schemes.

Original languageEnglish
Title of host publicationICICS 2009 - Conference Proceedings of the 7th International Conference on Information, Communications and Signal Processing
DOIs
StatePublished - 1 Dec 2009
Event7th International Conference on Information, Communications and Signal Processing, ICICS 2009 - Macau Fisherman's Wharf, Macao
Duration: 8 Dec 200910 Dec 2009

Publication series

NameICICS 2009 - Conference Proceedings of the 7th International Conference on Information, Communications and Signal Processing

Conference

Conference7th International Conference on Information, Communications and Signal Processing, ICICS 2009
CountryMacao
CityMacau Fisherman's Wharf
Period8/12/0910/12/09

Keywords

  • Index-level iterative source-channel decoding
  • Sectionalized trellis diagram

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