Space-Frequency OFDM System with Null-Steering Beamformer
The system employing space-frequency OFDM (SF-OFDM) transmitter diversity suffers enhanced co-channel interference (CCI) due to the use of multiple transmitters at each mobile. A beamforming for the cancellation of CCI in SF-OFDM system is proposed. The performance of the beamformer based on null-steering has been investigated. Simulation results show that the proposed method has a good CCI cancellation ability. Meanwhile, the system performance can be enhanced by using the time delays of the signals from different direction of arrivals (DOAs)
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