Fractionally spaced blind equalization with low-complexity concurrent constant modulus algorithm and soft decision-directed scheme

The paper proposes a low‐complexity concurrent constant modulus algorithm (CMA) and soft decision‐directed (SDD) scheme for fractionally spaced blind equalization of high‐order quadrature amplitude modulation channels. We compare our proposed blind equalizer with the recently introduced state‐of‐art...

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Bibliographic Details
Published in:International journal of adaptive control and signal processing 2005-08, Vol.19 (6), p.471-484
Main Authors: Chen, S., Chng, E. S.
Format: Article
Language:English
Subjects:
Algorithms
Blinds
Channels
constant modulus algorithm
Convergence
decision-directed adaptation
Equalization
Equalizers
fractionally spaced blind equalization
Quadrature amplitude modulation
Signal processing
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Summary:The paper proposes a low‐complexity concurrent constant modulus algorithm (CMA) and soft decision‐directed (SDD) scheme for fractionally spaced blind equalization of high‐order quadrature amplitude modulation channels. We compare our proposed blind equalizer with the recently introduced state‐of‐art concurrent CMA and decision‐directed (DD) scheme. The proposed CMA+SDD blind equalizer is shown to have simpler computational complexity per weight update, faster convergence speed, and slightly improved steady‐state equalization performance, compared with the existing CMA+DD blind equalizer. Copyright © 2004 John Wiley & Sons, Ltd.
ISSN:0890-6327
1099-1115
DOI:10.1002/acs.849