Utility-Based MIMO Uplink Beamforming

This paper addresses the design of transmit and receive beamformers in a multiple-input multiple-output (MIMO) uplink system. To optimize the beamformers, we introduce a new utility function defined as a weighted difference between users´ rates and their transmit power. This new criterion allows to take into account whether the users are more rate-sensitive or power-sensitive. Beamformers and power allocation are iteratively computed by resorting to the framework of non-cooperative game theory