A Survivor-Correction Viterbi Algorithm

Hiroshi KUBO
Atsushi IWASE

IEICE TRANSACTIONS on Communications   Vol.E83-B    No.6    pp.1321-1329
Publication Date: 2000/06/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technology
adaptive equalizers,  Viterbi detection,  maximum-likelihood detection,  iterative method,  

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This paper proposes a survivor-correction Viterbi algorithm (SCVA) and presents its application to an iterative sequence estimation in order to improve bit error rate performance of decision-feedback sequence estimation (DFSE) in the presence of intersymbol interference. The SCVA can mitigate erroneous survivor selections due to DFSE, because it modifies the add-compare-select operation to an add-correct-compare-select operation. Finally, it is confirmed by computer simulation that complexity of the proposed scheme is independent of delay of the main delayed ray and its performance is superior to that of DFSE at the same number of states.