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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 ; Fac. of Electr. Eng. & Mech. Comput. Sci., Delft Univ. of Technol. ; Leus, G. ; Banelli, P.

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:

Signal Processing Advances in Wireless Communications, 2006. SPAWC '06. IEEE 7th Workshop on

Date of Conference:

2-5 July 2006