A new method for multi-user MIMO power controlled systems

Multiple-input multiple-output (MIMO) systems can achieve high capacity with applying space division multiple access benefits. By using channel state information at BS/MS we can remove inter user interference by applying beam forming. An important challenge at multi user (MU) systems is how design transmitting vector with respect to inter user interference. Capacity problem optimization, maximizing throughput under power restriction, power control problems or power minimization with satisfying a minimum quality of service are some sample of this problem. None of above samples has closed-form unless by applying some restriction at them. We solve these problems, interference problem, minimizing power and reaching high rates with lower complexity under block diagonalization and successive optimization restrictions.