Title :
Reducing the convergence loss of 3-dimensional turbo codes
Author :
Kbaier Ben Ismail, D. ; Douillard, C. ; Kerouedan, S.
Author_Institution :
Lab.-STICC, Univ. Europeenne de Bretagne, Brest, France
Abstract :
This paper deals with the convergence loss reduction of a 3-dimensional turbo code combining both parallel and serial concatenation. This code is derived from the classical turbo code by concatenating a rate-1 post-encoder at its output. In order to reduce the observable loss of convergence at high error rates, we propose first a time varying construction of the post-encoded parity. Then, we analyse the association of the 3-dimensional turbo code with high order modulations, where both the systematic bits and the post-encoded parity bits are more protected than the other parity bits. Performance comparisons are made between the 3GPP2 standardized turbo code and the 3-dimensional 3GPP2 turbo code. The different stages are illustrated with simulation results, asymptotical bounds and EXIT charts.
Keywords :
convergence; modulation; turbo codes; 3-dimensional turbo codes; convergence loss reduction; modulations; parallel concatenation; post-encoded parity; rate-1 post-encoder; serial concatenation; Decoding; Magnetohydrodynamics; Random access memory; Three dimensional displays; 3-dimensional turbo code; 3GPP2; convergence threshold; iterative decoding; time varying trellis; turbo code; turbo coded modulation;
Conference_Titel :
Turbo Codes and Iterative Information Processing (ISTC), 2010 6th International Symposium on
Conference_Location :
Brest
Print_ISBN :
978-1-4244-6744-0
Electronic_ISBN :
978-1-4244-6745-7
DOI :
10.1109/ISTC.2010.5613823