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Adaptive identification and tracking of doubly selective fading channels for wireless MIMO-OFDM systems

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

In wireless MIMO-OFDM systems, accurate channel state information at the receiver is a prerequisite for large diversity and multiplexing gains. Here, we propose a pilot symbol assisted, LMS based, adaptive channel identification/tracking scheme for time-varying, delay-spread MIMO channels. Our scheme features automatic tuning of the LMS adaptation constants and modest computational complexity. No prior knowledge of channel statistics is required. Simulation results demonstrate the good performance of our algorithm for a wide range of SNR, maximum delay, and maximum Doppler.

Published in:

Signal Processing Advances in Wireless Communications, 2003. SPAWC 2003. 4th IEEE Workshop on

Date of Conference:

15-18 June 2003