Soft-in Syndrome Decoding of Convolutional Codes

Masato TAJIMA  Keiji SHIBATA  Zenshiro KAWASAKI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E85-A   No.8   pp.1979-1983
Publication Date: 2002/08/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Coding Theory
convolutional code,  syndrome decoding,  metric,  priori probability,  soft-in/soft-out decoding,  

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In this paper, we show that a priori probabilities of information bits can be incorporated into metrics for syndrome decoding. Then it is confirmed that soft-in/soft-out decoding is also possible for syndrome decoding in the same way as for Viterbi decoding. The derived results again show that the two decoding algorithms are dual to each other.