Minimum Terms of Residual Redundancy for Successful Iterative Source-Channel Decoding

Authors:

Adrat, M. ,  Clevorn, T. ,  Brauers, J. ,  Vary, P.

Journal:

(IEEE COML)

Volume:

10

Page(s):

778 - 780

number:

11

Date:

Nov. 2006

Language:

English

Abstract

Iterative source-channel decoding (ISCD) improves the error robustness of a digital communication system by iteratively evaluating natural residual source redundancy and artificial channel coding redundancy in a TURBO-like process. Based on recent results to extrinsic information transfer (EXIT) charts we present a novel (experimental) approach to quantify the minimum terms of residual redundancy which are needed for (almost) successful ISCD. Moreover, we clarify why in certain situations the decoding trajectory exceeds the EXIT-characteristic of soft decision source decoding (SDSD) in an ISCD scheme.

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