Optimal Precoder Design for MIMO Systems Using Decision Feedback Receivers

For precoder design problems in a Multi-Input Multi-Output (MIMO) communication system, perfect knowledge of the Channel State Information (CSI) at both the transmitter and the receiver is usually required. However, it is often difficult to provide sufficiently timely and accurate feedback of CSI from the receiver to the transmitter for such designs to be practically viable. In this paper, the authors consider the optimum design of a precoder for a wireless communication link having M transmitter antennas and N receiver antennas (M < N), in which the channels are assumed to be flat fading and may be correlated.