An adaptive reduced-state channel equalizer with T-algorithm

Author

Chang, K.C. ; Lam, W.H.

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong

fYear

1994

fDate

8-10 Jun 1994

Firstpage

1237

Abstract

The complexity of the maximum likelihood sequence estimation (MLSE) prohibits its widespread applications on channel equalization. In the paper, a reduced complexity algorithm, the dynamic T-algorithm, is proposed to compensate for the intersymbol interference (ISI) introduced by wideband mobile radio channels. The bit error rate (BER) performance over a two-path Rayleigh faded channel having a 5 symbol period of excess delay is examined. The average number of survivors is reduced by more than 90% (i.e., when t=0.2) at an expense of 3 dB degradation when the BER is 10^-2

Keywords

Rayleigh channels; adaptive equalisers; computational complexity; digital radio; error statistics; fading; interference suppression; intersymbol interference; land mobile radio; maximum likelihood estimation; multipath channels; radiofrequency interference; sequential estimation; time division multiple access; time-varying channels; T-algorithm; adaptive reduced-state channel equalizer; bit error rate performance; degradation; excess delay; intersymbol interference; reduced complexity; two-path Rayleigh faded channel; wideband mobile radio channels; Bit error rate; Delay; Demodulation; Equalizers; GSM; Land mobile radio; Maximum likelihood estimation; Receivers; State estimation; Time division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1994 IEEE 44th

Conference_Location

Stockholm

ISSN

1090-3038

Print_ISBN

0-7803-1927-3

Type

conf

DOI

10.1109/VETEC.1994.345290

Filename

345290