A soft-decision state-space equalizer for FIR channels

Author

Thielecke, Jörn

Author_Institution

Lehrstuhl fur Nachrichtentech., Erlangen-Nurnberg Univ., Germany

Volume

45

Issue

10

fYear

1997

fDate

10/1/1997 12:00:00 AM

Firstpage

1208

Lastpage

1217

Abstract

A nonlinear equalizer for binary data transmission over finite impulse response channels is developed. It is based on a state-space description of the channel. The equations of the resulting algorithm resemble the equations of a Kalman hard-decision feedback equalizer, similar to the one of McLaughlin et al. (1989). However, the derivation of the equalizer differs significantly from the derivation of the Kalman algorithm. In particular, probability estimates of the received bits are incorporated. They can be exploited in several ways to improve the performance of the equalizer and of the complete transmission system. Simulations for a mobile radio channel show that the new equalizer is an alternative to well-established equalizers like the Viterbi or the conventional hard-decision feedback equalizer

Keywords

FIR filters; data communication; equalisers; land mobile radio; state-space methods; telecommunication channels; FIR channels; Kalman hard-decision feedback equalizer; algorithm; binary data transmission; finite impulse response channels; mobile radio channel; nonlinear equalizer; performance; probability estimates; simulations; soft-decision state-space equalizer; Computational complexity; Data communication; Decoding; Equalizers; Feedback; Finite impulse response filter; Kalman filters; Land mobile radio; Nonlinear equations; Viterbi algorithm;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.634684

Filename

634684