Joint source-channel iterative decoding of codes

Author

Grangetto, M. ; Scanavino, B. ; Olmo, G.

Author_Institution

Center for Multimedia Radio Commun. Dipartimento di Elettronica, Politecnico di Torino Corso Duca degli Abruzzi, Italy

Volume

2

fYear

2004

fDate

20-24 June 2004

Firstpage

886

Abstract

In this paper an innovative joint source channel coding scheme is presented. The system is based on iterative soft decoding of arithmetic codes, by means of a novel soft-in soft-out decoder based on suboptimal search and pruning of a binary tree. An error resilient arithmetic coder with a forbidden symbol is used in order to improve the performance of the joint source/channel scheme. The performance in the case of transmission across the AWGN channel is evaluated in terms of frame error rate, and compared to a traditional separated approach. Finally the convergence property of the system is analyzed by means of the EXIT chart technique.

Keywords

AWGN channels; arithmetic codes; combined source-channel coding; error statistics; iterative decoding; AWGN channel; EXIT chart technique; arithmetic codes; binary tree; error resilient arithmetic coder; frame error rate; iterative soft decoding; soft-in soft-out decoder; source-channel iterative decoding; Arithmetic; Channel coding; Convergence; Convolutional codes; Error correction; Image coding; Image communication; Iterative decoding; Multimedia communication; Redundancy;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2004 IEEE International Conference on

Print_ISBN

0-7803-8533-0

Type

conf

DOI

10.1109/ICC.2004.1312629

Filename

1312629