Linear Multiuser MIMO Transceiver Optimization in Cooperative Networks

Joint design of linear multiuser multiple-input multiple-output (MIMO) transceiver subject to different optimization criteria and with per base station (BS) and/or per antenna power constraints is considered. We assume a scenario, where cooperative processing of transmitted signal from several BS antenna heads is applied to users located within a soft handover region. Solutions for three optimization criteria are derived: maximization of the weighted sum rate, finding a maximum weighted common rate achievable for each scheduled user and maximization of minimum weighted SINR per stream. The linear joint transceiver optimization algorithms are compared to each other, as well as, to corresponding optimal nonlinear transmission methods. The proposed algorithms provide very efficient solutions despite of the non-convexity of the problems.