Title :
Joint Source-Channel Decoding schemes based on structured LDPC codes: Asymptotic analysis and code design
Author :
Mattoussi, F. ; Poulliat, C.
Author_Institution :
Planete Res., INRIA Rhone-Alpes, Grenoble, France
Abstract :
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.
Keywords :
combined source-channel coding; decoding; parity check codes; asymptotic analysis; code design; encoding schemes; information mapping; iterative receivers; joint source-channel decoding schemes; multidimensional EXIT charts; protograph based codes; structured LDPC codes; structured low-density parity-check codes; Decoding; Encoding; Iterative decoding; Joints; Receivers; Redundancy;
Conference_Titel :
Signal Processing Advances in Wireless Communications (SPAWC), 2010 IEEE Eleventh International Workshop on
Conference_Location :
Marrakech
Print_ISBN :
978-1-4244-6990-1
Electronic_ISBN :
1948-3244
DOI :
10.1109/SPAWC.2010.5671060
