Title :
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
fDate :
June 28 2009-July 3 2009
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;
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
DOI :
10.1109/ISIT.2009.5205766
