Title :
Robust pilot-aided channel estimator for time-varying OFDM channels
Author :
Vigelis, Rui F. ; Cavalcante, Charles C.
Author_Institution :
Wireless Telecommun. Res. Group (GTEL), Fed. Univ. of Ceara, Fortaleza
Abstract :
This paper deals with time-varying channel estimation in orthogonal frequency division multiplexing (OFDM) systems by means of pilot-aided strategies. A robust estimator which does not depend on the channel statistics is proposed. The derivation is based on a constrained filtering approach and particular cases are analyzed. Simulation results are provided in order to verify the better performance of the proposal when compared to estimators reported in the literature.
Keywords :
OFDM modulation; channel estimation; fading channels; constrained filtering approach; fading channel; orthogonal frequency division multiplexing; pilot-aided channel estimator; robust estimator; time-varying OFDM channels; Filtering algorithms; Frequency estimation; Low pass filters; OFDM; Proposals; Robustness; Statistics; Time varying systems; Time-varying channels; Wiener filter;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2008. SPAWC 2008. IEEE 9th Workshop on
Conference_Location :
Recife
Print_ISBN :
978-1-4244-2045-2
Electronic_ISBN :
978-1-4244-2046-9
DOI :
10.1109/SPAWC.2008.4641659
