Convergence and errors in turbo-decoding

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 2001Publisher:IEEEJournal:Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252)

Authors: Andrew C. Reid; T. Aaron Gulliver; Desmond P. Taylor;

doi: 10.1109/isit.2001.935889 , 10.1109/26.974246

Convergence and errors in turbo-decoding

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Abstract

Summary: Turbo-codes are decoded using iterative decoding algorithms with somewhat elusive convergence properties. In this paper, the modes of convergence observed in an extensive series of turbo-code simulations are categorized by examining the bit convergence behavior for each frame. Based on these results, a new method for decoder termination based on average log-likelihood ratios is presented and compared with other methods. As an application, a selective repeat automatic repeat request (ARQ) system is considered.

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Keywords

turbo codes, Decoding, Other types of codes, stopping criterion, decoder convergence, log-likelihood decoding, iterative decoding

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