DocumentCode :
833128
Title :
Low complexity concurrent constant modulus algorithm and soft decision directed scheme for blind equalisation
Author :
Chen, S.
Author_Institution :
Sch. of Electron. & Comput. Sci., Univ. of Southampton, UK
Volume :
150
Issue :
5
fYear :
2003
Abstract :
The recently introduced concurrent constant modulus algorithm (CMA) and decision-directed (DD) scheme provides a state-of-the-art low-complexity blind equalisation technique for high-order quadrature amplitude modulation (QAM) channels. At a small cost of slightly more than doubling the complexity of the standard CMA blind equaliser, this concurrent CMA and DD blind equaliser achieves a dramatic improvement in equalisation performance over the CMA. In the paper, a new blind equalisation scheme is proposed based on concurrent CMA and a novel soft decision-directed (SDD) adaptation. The proposed concurrent CMA and SDD blind equaliser has simpler computational requirements than the concurrent CMA and DD algorithm. Extensive simulation shows that it has the same steady-state equalisation performance as the concurrent CMA and DD algorithm and a faster convergence speed over the latter scheme
Keywords :
blind equalisers <low complexity concurrent CMA and soft decision directed scheme for blind equalisation>; convergence of numerical methods <low complexity concurrent CMA and soft decision directed scheme for blind equalisation>; decision theory <low complexity concurrent CMA and soft decision directed scheme for blind equalisation>; quadrature amplitude modulation <low complexity concurrent CMA and soft decision directed scheme for blind equalisation>; CMA; concurrent constant modulus algorithm; convergence speed; high-order QAM channels; low-complexity blind equalisation; quadrature amplitude modulation; soft decision directed scheme; steady-state equalisation performance;
fLanguage :
English
Journal_Title :
Vision, Image and Signal Processing, IEE Proceedings -
Publisher :
iet
ISSN :
1350-245X
Type :
jour
DOI :
10.1049/ip-vis:20030619
Filename :
1248637
Link To Document :
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