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Fractionally spaced blind equalization with low‐complexity concurrent constant modulus algorithm and soft decision‐directed scheme
Author(s) -
Chen S.,
Chng E. S.
Publication year - 2005
Publication title -
international journal of adaptive control and signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 66
eISSN - 1099-1115
pISSN - 0890-6327
DOI - 10.1002/acs.849
Subject(s) - blind equalization , equalization (audio) , constant (computer programming) , computational complexity theory , convergence (economics) , equalizer , algorithm , adaptive equalizer , computer science , scheme (mathematics) , mathematics , control theory (sociology) , telecommunications , decoding methods , artificial intelligence , channel (broadcasting) , mathematical analysis , control (management) , economics , programming language , economic growth
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.