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Adaptive Wiener filters for time-varying channel estimation in wireless OFDM systems

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3 Author(s)
D. Schafhuber ; Inst. of Commun. & Radio-Frequency Eng., Vienna Univ. of Technol., Austria ; G. Matz ; F. Hlawatsch

In wireless OFDM systems, the time-varying channel is often estimated by a Wiener filter-type MMSE estimator based on pilot symbols. Such an estimator, however, requires statistical prior knowledge that is not easily obtained. Here, we propose adaptive Wiener filters for channel estimation that do not require statistical prior knowledge. We also calculate the performance limits of finite-length and infinite-length MMSE estimation. Simulation results demonstrate the good performance of our adaptive estimators.

Published in:

Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on  (Volume:4 )

Date of Conference:

6-10 April 2003