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Kalman tracking of time-varying channels in wireless MIMO-OFDM systems

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

The performance of coherent MIMO-OFDM systems critically depends on the availability of accurate channel estimates. In wireless communications, the MIMO channel is time-varying and thus has to be tracked by the receiver. In this paper, we develop an extended Kalman filter technique for pilot symbol assisted MIMO-OFDM channel tracking. Our tracking scheme is able to exploit spatial correlations of the channel. It includes on-line estimation of the channel's state-space parameters and hence does not require any prior knowledge. Simulations using measured channels demonstrate the excellent performance of our channel tracking scheme.

Published in:

Signals, Systems and Computers, 2004. Conference Record of the Thirty-Seventh Asilomar Conference on  (Volume:2 )

Date of Conference:

9-12 Nov. 2003

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