Analysis of LMS-adaptive MLSE equalization on multipath fading channels

Author

Chiu, Mao-Ching ; Chao, Chi-chao

Author_Institution

Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

44

Issue

12

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

1684

Lastpage

1692

Abstract

We consider a practical maximum-likelihood sequence estimation (MLSE) equalizer on multipath fading channels in conjunction with an adaptive channel estimator consisting of a least mean square (LMS) estimator and a linear channel predictor, instead of assuming perfect channel estimates. A new LMS estimator model is proposed which can accurately characterize the statistical behavior of the LMS estimator over multipath fading channels. Based on this model, a new upper-bound on block error rate is derived under the consideration of imperfect channel estimates. Computer simulations verify that our analytical results can correctly predict the real system performance and are applicable over a wide range of the step size parameter of the LMS estimator

Keywords

adaptive equalisers; estimation theory; fading; least mean squares methods; maximum likelihood estimation; multipath channels; LMS-adaptive MLSE equalization; adaptive channel estimator; block error rate; imperfect channel estimates; least mean square estimator; linear channel predictor; maximum-likelihood sequence estimation; multipath fading channels; statistical behavior; upper-bound; Adaptive equalizers; Channel estimation; Chaotic communication; Degradation; Error analysis; Fading; Intersymbol interference; Least squares approximation; Maximum likelihood estimation; Performance analysis;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.545898

Filename

545898