Equalization of digital radio channels with large multipath delay for cellular land mobile applications

Author

Cusani, Roberto ; Mattila, Jari

Author_Institution

INFOCOM Dept., Rome Univ., Italy

Volume

47

Issue

3

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

348

Lastpage

351

Abstract

A new maximum a posteriori (MAP) equalizer is proposed for digital radio links affected by large multipath delays. The “sparse” nature of the channel, where a few nonzero powerful taps are spaced by many negligible taps, is exploited to achieve a complexity proportional to the number of nonzero taps. When the channel is time-varying, an efficient nonlinear Kalman like channel estimator is employed to track only the nonzero taps

Keywords

adaptive Kalman filters; adaptive equalisers; cellular radio; computational complexity; delays; digital radio; filtering theory; interference suppression; intersymbol interference; multipath channels; nonlinear filters; parameter estimation; radio links; time-varying channels; adaptive nonlinear Kalman filter; cellular land mobile applications; complexity; digital radio channels equalization; digital radio links; intersymbol interference; maximum a posteriori equalizer; multipath delay; nonlinear Kalman like channel estimator; nonzero powerful taps; time-varying channel; timeslot-adaptive equalization; Bit rate; Decision feedback equalizers; Delay; Digital communication; Fading; GSM; Interference; Performance loss; Transversal filters; Viterbi algorithm;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.752812

Filename

752812