Covariance-based MIMO beamforming

This paper proposes an iterative algorithm that specifies transmit and receive beamformers based on different capabilities of the receiver in the case of available CDI at the transmitter and channel state information at the receiver. Simulations using the method in realistic MIMO channels show that its performance matches that obtained with existing algorithms when used in conjunction with optimal receiver architectures but that it allows specification of near-optimal transmit precoding for simple MMSE receivers. The simulations further demonstrate the impact of different implementation details and parameters on communication performance.