Efficient block implementation of the decision feedback equalizer

Author

Berberidis, Kostas ; Rontogiannis, Thanasis A. ; Theodoridis, Sergios

Author_Institution

Dept. of Comput. Eng., Patras Univ., Greece

Volume

5

Issue

6

fYear

1998

fDate

6/1/1998 12:00:00 AM

Firstpage

129

Lastpage

131

Abstract

A new block adaptive decision feedback equalizer is developed. Both the feedforward (FF) and the feedback (FB) filters are updated once every K sample time intervals, with K being the block length. It should be noted that this block adaptation is done in such a way that the resulting filters, and the decisions as well, are identical to those computed by the conventional sample by sample LMS-based decision feedback equalizer (LMS-DFE). The new algorithm offers substantial computational savings as compared to the sample-by-sample LMS-DFE with no loss in performance. The new block DFE turns out to be particularly suitable for applications requiring long equalizers.

Keywords

adaptive equalisers; adaptive filters; circuit feedback; computational complexity; decision feedback equalisers; feedforward; filtering theory; DFE; block adaptive decision feedback equalizer; decision feedback equalizer; feedback filters; feedforward filters; sample time intervals; Adaptive equalizers; Adaptive filters; Computational complexity; Computer vision; Decision feedback equalizers; Delay; Filtering; Finite impulse response filter; Informatics; Intersymbol interference;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/97.681426

Filename

681426