For Full-Text PDF, please login, if you are a member of IEICE,|
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
A Soft-Output Viterbi Equalizer Employing Expanded Memory Length in a Trellis
IEICE TRANSACTIONS on Communications
Publication Date: 1997/02/25
Print ISSN: 0916-8516
Type of Manuscript: Category: Radio Communication
soft-output Viterbi equalizer, MAP algorithm, Viterbi algorithm, soft-decision, intersymbol interference,
Full Text: PDF(345.5KB)>>
This paper presents a novel approach to a soft-output equalizer, which makes a symbol-by-symbol soft-decision based on a posteriori probabilities (APP's) criterion in the presence of intersymbol interference. The authors propose a soft-output Viterbi equalizer (SOVE) employing expanded memory length in a trellis of the Viterbi algorithm with small arithmetic complexity. The proposed equalizer gives suboptimum soft-decision closer to that of a equalizer with the maximum a posteriori probabilities (MAP) algorithm than the conventional SOVE.