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Joint Source-Channel Decoding schemes based on structured LDPC codes: Asymptotic analysis and code design

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2 Author(s)
Mattoussi, F. ; Planete Res., INRIA Rhone-Alpes, Grenoble, France ; Poulliat, C.

In this paper, we investigate the performance and the design of Joint Source-Channel Decoding (JSCD) schemes involving structured Low-Density Parity-Check (LDPC) codes such as protograph based codes. We first present the asymptotic analysis of such iterative receivers based on multi-dimensional EXIT charts. Since a protograph can be interpreted as different encoding schemes, the information mapping becomes an issue. We will thus show that, using the EXIT chart analysis, it is possible to select the best suited scheme for JSCD. Finally, the design of protographs for JSCD systems is addressed and finite length simulation results are provided.

Published in:

Signal Processing Advances in Wireless Communications (SPAWC), 2010 IEEE Eleventh International Workshop on

Date of Conference:

20-23 June 2010