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Performance of joint source–channel decoding with iterative bit combining and detection

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Abstract

A joint source–channel decoding scheme (JSCD) with iterative bit combining (IBC) is proposed, which exploits two types of a priori information. The first one is the a priori bit probabilities obtained from source statistics, and the second is the channel a priori probabilities obtained from saved extrinsic information of previous transmissions. The JSCD-IBC scheme also incorporates iterative detection as both a stopping criteria and mechanism for triggering retransmissions. This adds an implicit adaptivity to the system and prevents excess iterations/retransmissions from being effected. The performance of the JSCD-IBC scheme is evaluated with four different iterative detection schemes and also two different types of variable length codes, Huffman and reversible variable length codes. Simulation results show that a significant performance gain in terms of bit error rate, throughput, and number of iterations can be achieved with the JSCD-IBC scheme as compared to a separate decoding scheme.

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Acknowledgments

The financial contribution of the Tertiary Education Commission of Mauritius and of the University of Mauritius is duly acknowledged.

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Authors and Affiliations

  1. Department of Electrical and Electronic Engineering, Faculty of Engineering, University of Mauritius, Reduit, Mauritius

    T. P Fowdur & K. M. S. Soyjaudah

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  1. T. P Fowdur
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  2. K. M. S. Soyjaudah
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Correspondence to T. P Fowdur.

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Fowdur, T.P., Soyjaudah, K.M.S. Performance of joint source–channel decoding with iterative bit combining and detection. Ann. Telecommun. 63, 409–423 (2008). https://doi.org/10.1007/s12243-008-0039-0

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  • DOI: https://doi.org/10.1007/s12243-008-0039-0

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