Combined Code Aided Adaptive Equalization and Soft Decision-Directed Algorithm for Wireless Communications

Yun Fo LEE  Mu Zhong WANG  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.7   pp.1402-1405
Publication Date: 2002/07/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
adaptive equalization,  coding,  fading channel,  

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We propose using a soft decision-directed least-mean-square algorithm in a code-aided equalization scheme for fading channels. Soft-output Viterbi algorithm (SOVA) is modified and applied to strengthen the second-stage equalizer adaptation in the scheme. Simulation results are presented for bit error rate performance in a multipath environment for various normalized fade rates. The proposed equalizer scheme is shown to provide significant bit error rate improvement compared to conventional equalization schemes.