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Pilot-Assisted Time-Varying OFDM Channel Estimation Based on Multiple OFDM Symbols

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3 Author(s)
Zijian Tang ; Delft University of Technology - Fac. EEMCS, Mekelweg 4, 2628 CD Delft, The Netherlands. ; Geert Leus ; Paolo Banelli

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 a channel estimator that can combat both the additive noise and the out-of-band interference. Compared to our previous work, the proposed channel estimator can span multiple OFDM symbol intervals such that more time-correlation information can be explored to improve the estimation accuracy

Published in:

2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications

Date of Conference:

2-5 July 2006