Pseudo Floating Point Representation for Non-binary Turbo Decoder Extrinsic Information Memory Reduction

Sook Min PARK  Jaeyoung KWAK  Do-Sik YOO  Kwyro LEE  

IEICE TRANSACTIONS on Communications   Vol.E90-B   No.11   pp.3250-3254
Publication Date: 2007/11/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.11.3250
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
non-binary,  duo-binary,  turbo codes,  extrinsic information,  extrinsic memory,  

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A method is presented that can substantially reduce the memory requirements of non-binary turbo decoders by efficient representation of the extrinsic information. In the case of the duo-binary turbo decoder employed by the IEEE 802.16e standard, the extrinsic information memory can be reduced by about 43%, which decreases the total decoder complexity by 18%. We also show that the proposed algorithm can be implemented by simple hardware architecture.