SPC02-4: Channel Estimation for OFDM-Based SPRAS-MIMO System

Multiple input multiple output (MIMO) systems equipped with Smart Passive Receive Antenna Selection (SPRAS) technique [1], [3] need the Channel State Information at Receiver side (CSIR) to maximize the mutual information through applying the optimum passive weighting matrix. In this paper, a frequency domain channel estimation method is proposed for Orthogonal Frequency-Division Multiplexing (OFDM)-based SPRAS-MIMO system in generalized condition, and a mathematical method is provided to deduce both the training sequence and beamformer structure design during channel estimation. The channel estimation method is realized in an IEEE 802.16 based MIMO system. The simulation results show that this method works well for different estimation criteria.