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Blind adaptive decision feedback equalization: A class of channels resulting in ill‐convergence from a zero initialization
Author(s) -
Casas Raúl A.,
Johnson C. Richard,
Kennedy Rodney A.,
Ding Zhi,
Malamut Roberto
Publication year - 1998
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/(sici)1099-1115(199803)12:2<173::aid-acs486>3.0.co;2-v
Subject(s) - initialization , zero (linguistics) , convergence (economics) , equalization (audio) , blind equalization , equalizer , channel (broadcasting) , computer science , control theory (sociology) , class (philosophy) , noise (video) , mathematical optimization , mathematics , artificial intelligence , telecommunications , philosophy , linguistics , control (management) , economics , image (mathematics) , programming language , economic growth
This paper addresses the ill‐convergence of blind adaptive decision feedback equalizers using the decision‐directed algorithm under a zero initialization. In particular, the paper identifies analytically a class of channels for which the adaptive equalizer parameters converge to an undesired minimum where incorrect decision estimates can be made under zero noise. This misbehaviour occurs despite the existence of a DFE parameter setting that perfectly equalizes the channel. © 1998 John Wiley & Sons, Ltd.