TITLE:
Optimal M-BCJR Turbo Decoding: The Z-MAP Algorithm
AUTHORS:
Aissa Ouardi, Ali Djebbari, Boubakar Seddik Bouazza
KEYWORDS:
MAP-BCJR Algorithm, M-BCJR, Turbo Decoding, Complexity Reduction, Error Localisation Criterion
JOURNAL NAME:
Wireless Engineering and Technology,
Vol.2 No.4,
October
24,
2011
ABSTRACT: In this paper, we propose a novel idea for improvement performances of the leader M-BCJR algorithm functioning in low complexity. The basic idea consists to localize error instant possibility, and then increase the complexity around this moment. We also propose an easy and important idea for early localisation of erroneous moments. We call this new algorithm Z-MAP. The simulations show that the improvement of performances is significant. The performances of Z-MAP turbo decoding are so close to full MAP-BCJR performances. Furthermore, the complexity is the same that of the M-BCJR. So, Z-MAP is an optimal version of M-BCJR algorithm.