METHOD AND APPARATUS FOR BEAMFORMING USING DATA RATE MAXIMISATION

摘要

The present invention relates to a method of transmitting a signal carrying data in a multiple-input multiple-output (MIMO) communication system involving a plurality of users, said method comprising the steps of: determining (A) at least one beamforming vector for at least one of said users; precoding (B) said data in accordance with the beamforming vector prior to the transmission (C) of the signal from a plurality of transmitting antennas of a transmitting apparatus; wherein the beamforming vector is determined for said user (uk) by computing the beamforming vector (wk) which maximizes the difference between the sum data rate throughput (U) achieved by said user (uk) and at least one other user (u1,u2) and the sum data rate throughput achieved by said at least one other user (u1,u2) without said user. The present invention also relates to a transmitting apparatus for performing this method and a multiple-input multiple-output (MIMO) communication system comprising such a system.