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Low-complexity Doppler compensation in mobile SIMO-OFDM systems

: Schellmann, M.; Thiele, L.; Jungnickel, V.


Matthews, M.B. ; Naval Postgraduate School -NPS-, Monterey/Calif.; IEEE Signal Processing Society:
42nd Asilomar Conference on Signals, Systems and Computers 2008. Proceedings. Vol.2 : Pacific Grove, California, USA, 26 - 29 October 2008
Piscataway, NJ: IEEE, 2008
ISBN: 978-1-4244-2940-0
ISBN: 978-1-4244-2941-7
Asilomar Conference on Signals, Systems and Computers <42, 2008, Pacific Grove/Calif.>
Conference Paper
Fraunhofer HHI ()
doppler effect; intercarrier interference; ofdm modulation; signal-processing

In high-mobility OFDM systems, Doppler distortions cause inter-carrier interference (ICI) that may degrade the system performance severely. Although thoroughly studied, hardly any approaches for ICI estimation and compensation exist that maintain the OFDM-specific subcarrier-wise signal processing and thus provide a solution with reasonable demands on complexity. For a multi-antenna receiver, this paper proposes such an approach which relies on optimum combining of the signals from the different receive antennas. The ICI is characterized in terms of a frequency-selective interference function, which can be estimated by simple means using common pilot signals.