Decision feedback equalization in time-varying frequency-selective channels

Author

Borah, Deva K. ; Hart, Brian D.

Author_Institution

Telecommun. Eng. Group, Australian Nat. Univ., Canberra, ACT, Australia

Volume

1

fYear

1999

fDate

1999

Firstpage

403

Abstract

Decision feedback equalizers (DFEs) for time-varying frequency-selective channels are proposed. The channel estimator explicitly models the time variation of the channel taps via polynomials and the feedforward/feedback filter (FFF/FBF) taps of the DFE are computed from the time-varying channel impulse response estimate. In fast fading channels, as the signal-to-noise ratio (SNR) increases, the proposed DFE structure outperforms the per-survivor processing (PSP) based MLSD receiver which employs the least mean squares (LMS) algorithm for channel estimation

Keywords

data communication; decision feedback equalisers; fading channels; feedforward; land mobile radio; parameter estimation; polynomials; quadrature phase shift keying; time-varying channels; transient response; QPSK; SNR; channel estimator; channel taps; decision feedback equalization; fast fading channels; feedforward/feedback filter taps; impulse response estimate; least mean squares algorithm; per-survivor processing based MLSD receiver; polynomials; signal-to-noise ratio; time variation; time-varying frequency-selective channels; Channel estimation; Decision feedback equalizers; Fading; Field-flow fractionation; Filters; Frequency; Least squares approximation; Polynomials; Signal to noise ratio; Time-varying channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Its Applications, 1999. ISSPA '99. Proceedings of the Fifth International Symposium on

Conference_Location

Brisbane, Qld.

Print_ISBN

1-86435-451-8

Type

conf

DOI

10.1109/ISSPA.1999.818197

Filename

818197