Multiple Antennas Angle Domain Resolution Based Transceiver Algorithm for High-speed Mobile Environment

In high-speed mobile environment, the orthogonality between different subcarriers in OFDM is destroyed and the performance for system decreases rapidly. In this paper, the mathematical model of Doppler spread caused by high-speed mobility is analyzed and a novel multiple antennas angle resolution based transceiver algorithm is proposed. In this algorithm, orthogonal angle domain subspace projection is utilized. The Doppler spread is simplified as Doppler frequency offset on each orthogonal angle domain subspace and Doppler parameter estimation is utilized to suppress the effect caused by high-speed mobility. Simulation results show that the proposed algorithm suppress the inter-carrier-interference of OFDM in high-speed mobile environment effectively and can achieve performance improvement.