A feedback approach to the steady-state performance of fractionally spaced blind adaptive equalizers

Author

Mai, Junyu ; Sayed, Ali H.

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

Volume

48

Issue

1

fYear

2000

fDate

1/1/2000 12:00:00 AM

Firstpage

80

Lastpage

91

Abstract

This paper proposes a new approach to the analysis of the steady-state performance of constant modulus algorithms (CMA), which are among the most popular adaptive schemes for blind equalization. A major feature of the proposed feedback approach is that it bypasses the need for working directly with the weight error covariance matrix. In so doing, approximate expressions for the steady-state mean-square error of several CM algorithms are derived, including CMA2-2, CMA1-2, normalized CMA, and a new normalized CMA variant with less bias. A comparison among the various algorithms is also performed, along with several simulation results. The conclusions confirm the superior performance of CMA2-2

Keywords

adaptive equalisers; blind equalisers; feedback; mean square error methods; CM algorithms; CMA1-2; CMA2-2; approximate expressions; blind equalization; constant modulus algorithms; feedback approach; fractionally spaced blind adaptive equalizers; normalized CMA; simulation results; steady-state mean-square error; steady-state performance; superior; Adaptive equalizers; Algorithm design and analysis; Blind equalizers; Covariance matrix; Error analysis; Feedback; Filters; Performance analysis; Signal analysis; Steady-state;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.815481

Filename

815481