Iterative SINR-Max Cooperative Beamforming in Multiuser MIMO Systems

We have proposed the SINR-max cooperative beamforming design, which aims to maximize the signal-to-interference-noise ratio of each user by exploiting the advantage of the full multiuser channel state information available at the transmitters. The SINR-max cooperative beamformers are solutions to a set of complicated equations and thus have no closed-form expression. In our previous work, statistical modeling is applied to beamformers to ease the mathematical complication but the obtained beamformers are not the exact solutions to original equations. In this paper, we proposed two iterative algorithms to solve for the exact SINR-max beamformer. Furthermore, the efficiency of the SINR-max cooperative beamforming design can be improved by adopting the power iteration method.