Subblock channel estimation for MIMO OFDM systems based on angle domain slepian basis

A subblock-wise channel estimation scheme based on angle domain discrete prolate spheroidal basis expansion model (ADDPS-BEM) is proposed for MIMO OFDM systems with doubly-selective channel. An ADDPS-BEM is used to track the channel of doubly-selective and spatially correlated. Time-multiplexed trainings are used to measure delay-Doppler channel. The relatively ADDPS coefficients are estimated by the subblock-wise tracking algorithm. Simulation results show that the proposed algorithm can effectively improve the channel estimation performance.