Hybrid Diversity Maximization Precoding for the Multiuser MIMO Downlink

In this paper, we present a high-performance hybrid linear precoding scheme for the downlink of multiuser multiple-input multiple-output (MU-MIMO) systems based on the combination of an iterative modified regularized block diagonalization (IMRBD) precoding and minimum mean square error (MMSE) precoding. The proposed hybrid diversity maximization (HDM) scheme aims to maximize the diversity gain by means of this dual-stage precoding strategy while maintaining relatively low complexity. The simulation results show that HDM precoding can provide comparable or even better performance than other iterative precoding schemes, including some of the more complex ones.