Title :
Pilot-Assisted Time-Varying Ofdm Channel Estimation
Author :
Tang, Zijian ; Leus, Geert ; Cannizzaro, Rocco Claudio ; Banelli, Paolo
Author_Institution :
Fac. of EEMCS, Delft Univ. of Technol.
Abstract :
In this paper, we deal with channel estimation for orthogonal frequency-division multiplexing (OFDM) systems. The channels are assumed to be time-varying (TV) and approximated by a basis expansion model (BEM). Due to the time-variation, the resulting channel matrix in the frequency domain is no longer diagonal, but can be approximated as banded. Based on this band approximation, we propose novel channel estimators to combat both the noise and the out-of-band interference. Our claims are supported by simulation results, which are obtained based on realistic TV channels with a fairly high Doppler spread
Keywords :
OFDM modulation; approximation theory; channel estimation; matrix algebra; time-varying channels; Doppler spread; OFDM channel estimation; band approximation; basis expansion model; channel matrix; orthogonal frequency-division multiplexing; out-of-band interference; pilot-assisted time-varying channel; Bandwidth; Channel estimation; Discrete Fourier transforms; Frequency division multiplexing; Frequency domain analysis; Interference; OFDM; TV; Time domain analysis; Time-varying channels; BEM; OFDM; pilot-assisted modulation; time-varying channels;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on
Conference_Location :
Toulouse
Print_ISBN :
1-4244-0469-X
DOI :
10.1109/ICASSP.2006.1660923
