Efficient Computation of EXIT Functions for Nonbinary Iterative Decoding

Author

Kliewer, Jorg ; Ng, Soon Xin ; Hanzo, Lajos

Author_Institution

Commun. Res. Group, Southampton Univ.

Volume

54

Issue

12

fYear

2006

Firstpage

2133

Lastpage

2136

Abstract

The calculation of nonbinary extrinsic information transfer charts for the iterative decoding of concatenated index-based codes is addressed. We show that the extrinsic information at the output of a constituent a posteriori probability decoder can be calculated with very low complexity, where expensive histogram measurements are not required any more. An example for turbo trellis-coded modulation demonstrates the capabilities of the proposed approach

Keywords

concatenated codes; iterative decoding; maximum likelihood decoding; trellis coded modulation; turbo codes; EXIT functions; a posteriori probability decoder; concatenated index-based codes; extrinsic information transfer charts; nonbinary iterative decoding; turbo trellis-coded modulation; Concatenated codes; Convergence; H infinity control; Histograms; Information analysis; Iterative decoding; Modulation coding; Mutual information; Parity check codes; Probability; Extrinsic information transfer (EXIT) charts; nonbinary iterative decoding; turbo trellis-coded modulation (TTCM);

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2006.885050

Filename

4026725