Successive and Dynamic Precoding Scheme for Multiuser MIMO Systems with Limited Feedback

In this paper, we propose a limited-feedback preceding scheme, successive and dynamic per-user rate control (SD- PURC), in the multiuser multiple-input multiple-output (MIMO) downlink systems. This scheme is characterized by the successive process of scheduling and the dynamic adjustment of correlation parameters with regard to a set of non-orthogonal precoding vectors. Simulation results indicate that relative to the existing precoding scheme, per-user unitary rate control (PU²RC), the successive and dynamic mechanism in the proposed scheme can greatly improve the system sum-rate performance with less feedback amount.