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Estimation of rapid time-variant channels for OFDM using Wiener filtering

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2 Author(s)
Sgraja, C. ; Dept. of Information Technol., Ulm Univ., Germany ; Lindner, J.

The performance of orthogonal frequency division multiplexing (OFDM) deteriorates in a rapidly time-varying environment due to the loss of orthogonality, resulting in inter-channel interference (ICI). Moreover, the quality of model-based channel estimation may degrade if the estimator has been designed for a time-invariant scenario. In this paper, we consider OFDM and pilot-aided channel estimation via Wiener filtering and derive the filter for a time-variant WSSUS model. In addition, the analysis allows to compute the performance loss for an improper estimation filter which suffers from the problem of model mismatch.

Published in:

Communications, 2003. ICC '03. IEEE International Conference on  (Volume:4 )

Date of Conference:

11-15 May 2003