Minimum MSE Based MIMO-OFDM Precoded Spatial Multiplexing Systems with Limited Feedback

This paper deals with design and performance analysis of transmit precoder optimization for MIMO-OFDM systems with limited feedback of channel state information (CSI). We assume that the receiver has perfect channel knowledge while the transmitter has only partial channel knowledge from limited feedback. We propose MSE-based optimal codebook design algorithm for MIMO-OFDM precoded spatial multiplexing systems under a specific average power constraint. The optimal precoder has the structure of a precoding and power allocation for each mode obtained by water-filling process. We derived the closed form solution for power allocation in the MSE- sense. Simulation results show that the MSE-based codebook construction algorithm with hybrid design of power allocation and precoding can achieve better performance than that of equal power allocattion based codebook in the previous works.

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