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LDGM Codes for Channel Coding and Joint Source-Channel Coding of Correlated Sources

Abstract

We propose a coding scheme based on the use of systematic linear codes with low-density generator matrix (LDGM codes) for channel coding and joint source-channel coding of multiterminal correlated binary sources. In both cases, the structures of the LDGM encoder and decoder are shown, and a concatenated scheme aimed at reducing the error floor is proposed. Several decoding possibilities are investigated, compared, and evaluated. For different types of noisy channels and correlation models, the resulting performance is very close to the theoretical limits.

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Correspondence to Wei Zhong.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Zhong, W., Garcia-Frias, J. LDGM Codes for Channel Coding and Joint Source-Channel Coding of Correlated Sources. EURASIP J. Adv. Signal Process. 2005, 178231 (2005). https://doi.org/10.1155/ASP.2005.942

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Keywords and phrases:

  • channel coding
  • LDPC codes
  • LDGM codes
  • iterative decoding
  • correlated sources
  • joint source-channel coding