Title :
On the utilization of residual source redundancy for iterative joint source-channel decoding of variable-length codes
Author :
Kliewer, Jörg ; Thobaben, Ragnar
Author_Institution :
Inst. for Circuits & Syst. Theor., Kiel Univ., Germany
Abstract :
We present a novel symbol-based a posteriori probability (APP) decoder for packetized variable-length encoded source indices transmitted over wireless channels, which exploits residual index correlations after source encoding for error correction. By additionally protecting the variable-length encoded bitstream with channel codes, an iterative decoding scheme can be obtained where the proposed APP source decoder serves as constituent decoder.
Keywords :
combined source-channel coding; error correction codes; iterative decoding; probability; redundancy; variable length codes; APP source decoder; channel codes; constituent decoder; error correction; iterative decoding; joint source-channel decoding; residual index correlations; residual source redundancy; source encoding; symbol-based a posteriori probability decoder; variable-length codes; wireless channels; Circuits and systems; Convolutional codes; Delay; Iterative decoding; Markov processes; Probability distribution; Protection; Quantization; Rayleigh channels; Redundancy;
Conference_Titel :
Information Theory, 2002. Proceedings. 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7501-7
DOI :
10.1109/ISIT.2002.1023471
