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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
Publication Date: 2007/11/01
Online ISSN: 1745-1345
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.