Iterative joint source-channel decoding with combined a priori information of source and channel

Author

Liu, Xiaobei ; Koh, Soo Ngee

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

9

Issue

4

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

355

Lastpage

357

Abstract

A joint source-channel decoding (JSCD) scheme which exploits the combined a priori information of source and channel in an iterative manner is proposed. A sequence minimum mean-square error (SMMSE) estimator based on bit or symbol error transition probability of the channel with memory is proposed and used in the iterative decoding process. Simulation results show that our proposed scheme leads to significant improvement over the scheme without using the a priori information of the source or channel.

Keywords

Markov processes; combined source-channel coding; error statistics; iterative decoding; least mean squares methods; maximum likelihood decoding; maximum likelihood sequence estimation; telecommunication channels; Gilbert channel; JSCD; SMMSE; a priori information; bit error transition probability; finite-state Markov channel; iterative manner; joint source-channel decoding scheme; sequence minimum mean-square error estimator; symbol error transition probability; AWGN channels; Bit error rate; Distortion; Fading; Frequency; Iterative decoding; Probability; Redundancy; State estimation; Statistics;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2005.1413632

Filename

1413632