Optimized concatenated LDPC codes for joint source-channel coding

Author

Fresia, M. ; Perez-Cruz, Fernando ; Poor, H. Vincent

Author_Institution

Dept. of Electr. Eng., Princeton Univ., Princeton, NJ, USA

fYear

2009

fDate

June 28 2009-July 3 2009

Firstpage

2131

Lastpage

2135

Abstract

In this paper a scheme for joint source-channel coding based on low-density-parity-check (LDPC) codes is investigated. Two concatenated independent LDPC codes are used in the transmitter: one for source coding and the other for channel coding, with a joint belief propagation decoder. The asymptotic behavior is analyzed using EXtrinsic Information Transfer (EXIT) charts and this approximation is corroborated with illustrative experiments. The optimization of the degree distributions for our sparse code to maximize the information transmission rate is also considered.

Keywords

approximation theory; combined source-channel coding; concatenated codes; decoding; parity check codes; EXIT chart; approximation theory; asymptotic behavior analysis; extrinsic information transfer; joint belief propagation decoder; joint source-channel coding; low-density-parity-check code; optimized concatenated independent LDPC codes; transmitter; Channel coding; Concatenated codes; Decoding; Entropy; H infinity control; Information analysis; Parity check codes; Redundancy; Source coding; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory, 2009. ISIT 2009. IEEE International Symposium on

Conference_Location

Seoul

Print_ISBN

978-1-4244-4312-3

Electronic_ISBN

978-1-4244-4313-0

Type

conf

DOI

10.1109/ISIT.2009.5205766

Filename

5205766