A Low-Complexity Stopping Criterion for Iterative Turbo Decoding

Dong-Soo LEE
In-Cheol PARK

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B    No.1    pp.399-401
Publication Date: 2005/01/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.1.399
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
iterative decoding,  stopping criteria,  turbo decoder,  

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Summary: 
This letter proposes an efficient and simple stopping criterion for turbo decoding, which is derived by observing the behavior of log-likelihood ratio (LLR) values. Based on the behavior, the proposed criterion counts the number of absolute LLR values less than a threshold and the number of hard decision 1's in order to complete the iterative decoding procedure. Simulation results show that the proposed approach achieves a reduced number of iterations while maintaining similar BER/FER performance to the previous criteria.