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

Author(s): Zhong Wei | Garcia-Frias Javier

Journal: EURASIP Journal on Advances in Signal Processing
ISSN 1687-6172

Volume: 2005;
Issue: 6;
Start page: 178231;
Date: 2005;
Original page

Keywords: channel coding | LDPC codes | LDGM codes | iterative decoding | correlated sources | joint source-channel coding

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.

Tango Jona
Tangokurs Rapperswil-Jona

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