Title :
Minimum Terms of Residual Redundancy for Successful Iterative Source-Channel Decoding
Author :
Adrat, Marc ; Clevorn, Thorsten ; Brauers, Johannes ; Vary, Peter
Author_Institution :
FKIE/KOM, Res. Establ. of Appl. Sci., Wachtberg
fDate :
11/1/2006 12:00:00 AM
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
Keywords :
combined source-channel coding; iterative decoding; redundancy; turbo codes; EXIT chart; ISCD; SDSD; TURBO-like process; artificial channel coding redundancy; digital communication system; extrinsic information transfer; iterative source-channel decoding; minimum term; soft decision source decoding; Channel coding; Delay; Digital communication; Information analysis; Iterative decoding; Redundancy; Robustness; Signal design; Signal processing; Speech codecs;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2006.060544
