Open Access

Asymmetric Joint Source-Channel Coding for Correlated Sources with Blind HMM Estimation at the Receiver

EURASIP Journal on Wireless Communications and Networking20052005:357402

DOI: 10.1155/WCN.2005.483

Received: 25 October 2004

Published: 8 September 2005

Abstract

We consider the case of two correlated sources, and . The correlation between them has memory, and it is modelled by a hidden Markov chain. The paper studies the problem of reliable communication of the information sent by the source over an additive white Gaussian noise (AWGN) channel when the output of the other source is available as side information at the receiver. We assume that the receiver has no a priori knowledge of the correlation statistics between the sources. In particular, we propose the use of a turbo code for joint source-channel coding of the source . The joint decoder uses an iterative scheme where the unknown parameters of the correlation model are estimated jointly within the decoding process. It is shown that reliable communication is possible at signal-to-noise ratios close to the theoretical limits set by the combination of Shannon and Slepian-Wolf theorems.

Keywords

distributed source coding hidden Markov model parameter estimation Slepian-Wolf theorem joint source-channel coding

Authors’ Affiliations

(1)
Centro de Estudios e Investigaciones Técnicas de Gipuzkoa (CEIT), Parque Tecnologico de San Sebastián, Paseo Mikeletegi, N48

Copyright

© Javier Del Ser et al. 2005

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.