DocumentCode :
401268
Title :
Time-varying FIR decision feedback equalization of doubly-selective channels
Author :
Barhumi, Imad ; Leus, Geert ; Moonen, Marc
Author_Institution :
ESAT, Katholieke Univ., Leuven, Belgium
Volume :
4
fYear :
2003
fDate :
1-5 Dec. 2003
Firstpage :
2263
Abstract :
We propose a minimum mean-square error (MMSE) time-varying (TV) finite impulse response (FIR) decision feedback equalizer (DFE) for doubly-selective (time- and frequency-selective) channels. We use the basis expansion model (BEM) to approximate the doubly-selective channel and to design the TV FIR DFE. This allows us to turn a large design problem into an equivalent small design problem, containing only the BEM coefficients of the doubly-selective channel and the BEM coefficients of the TV FIR feedforward and feedback equalization filters. Through computer simulations we show that the performance of the proposed TV FIR DFE approaches the performance of the block DF equalizer, while the equalization and the design complexity are generally much lower.
Keywords :
FIR filters; cellular radio; computational complexity; decision feedback equalisers; digital radio; fading channels; feedback; feedforward; intersymbol interference; least mean squares methods; multipath channels; DFE; FIR equalizer; FIR filters; MMSE equalizer; basis expansion model; block equalizer; digital cellular systems; doubly-selective channels; feedback equalization filters; feedforward equalization filters; finite impulse response equalizer; frequency-selective channels; intersymbol interference; minimum mean-square error equalizer; multipath fading; time-selective channels; time-varying FIR decision feedback equalizer; time-varying equalizer; Communication industry; Computer simulation; Decision feedback equalizers; Finite impulse response filter; Frequency; Helium; Intersymbol interference; Maximum likelihood estimation; TV; Wireless communication;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
Type :
conf
DOI :
10.1109/GLOCOM.2003.1258638
Filename :
1258638
Link To Document :
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