An Effective Transmit Weight Design for DPC With Maximum Beam in Multi-User MIMO Downlink

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Executive Summary

A novel transmit scheme is proposed for the cancellation of Inter-User Interference (IUI) and the improvement of achievable sum-rate of system in Multi-User Multiple-Input Multiple Output (MU-MIMO) downlinks. Particle Swarm Optimization (PSO) algorithm is employed to solve the constrained nonlinear optimization problem for obtaining the optimal transmit weights. Compared with the conventional Dirty Paper Coding (DPC) having single receive antenna, the proposed scheme applies the principle of DPC to cancel the IUI in MU-MIMO downlinks, where the Mobile Station (MS) users are equipped with multiple receive antennas.

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