NDLI: Techniques for early stopping and error detection in turbo decoding

Content Provider	IEEE Xplore Digital Library
Author	Fengqin Zhai Fair, I.J.
Copyright Year	1972
Abstract	In this letter, we present three new criteria for early stopping and error detection in turbo decoding. The approaches are based on monitoring the mean of the absolute values of the log-likelihood ratio of the decoded bits, which we show to be directly related to the variance of the metachannel. We demonstrate that this mean value increases as the number of errors in a frame decreases, and as a result, propose the simple mean-estimate criterion. We show that the systematic component of a terminated recursive systematic convolutional encoder used in turbo codes provides a built-in cyclic redundancy check (CRC). To further improve the performance, we also propose the mean-sign-change (MSC) criterion and the MSC-CRCeb criterion, in which a short external CRC code and the built-in CRC are concatenated with the MSC criterion.
Starting Page	1617
Ending Page	1623
Page Count	7
File Size	399346
File Format	PDF
ISSN	00906778
Volume Number	51
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Iterative decoding Cyclic redundancy check Monitoring Turbo codes Bit error rate Cyclic redundancy check codes Computer errors Object detection Error correction codes Convolutional codes
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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