Title :
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
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;
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
DOI :
10.1109/ISSPA.1999.818197
