METHOD AND DEVICE FOR CANCELLING DOPPLER SHIFT INDUCED INTER CARRIER INTERFERENCE IN AN OFDM COMMUNICATION SYSTEM BY USING SIGNAL PRE-DISTORTION

摘要

A Transmitter for generating an OFDM signal is disclosed that comprises a Doppler pre-distortion unit with an input section for receiving a data vector S, an OFDM modulator, a Doppler Shift memory location for readably storing a pre-determined Doppler Shift value. The Doppler pre-distortion unit is adapted to generate a pre-distorted data vector S_PD from the data vector S. The components of the pre-distorted vector S_PD and of the data vector S represent data symbols and the pre-distorted data vector S_PD is a linear function of the data vector S, and the linear function is dependent on the Doppler shift value. The OFDM modulator is adapted to gener¬ ate an OFDM signal such that sub-carrier amplitudes of the ODFM signal are based on the components of the pre-distorted data vector S_PD.