Intercarrier interference cancellation using complex conjugate technique for Alamouti-coded MIMO-OFDM Systems

This paper proposes an Alamouti coded orthogonal frequency division multiplexing (OFDM) scheme combining with the intercarrier interference (ICI) conjugate cancellation scheme in order to mitigate ICI caused by frequency offset in MIMO system. The proposed system provides advantages of a conjugate cancellation scheme, such as backward compatibility with the existing Alamouti coded OFDM system and low receiver complexity. Simulation results show that the proposed scheme achieves a lower bit error rate (BER) compared with existing Alamouti coded OFDM system in both AWGN and fading channels.