标题：Optimal power analysis of downlink multi-user SA-MIMO systems use
作者：Dai, Jian Xin ;Zhou, Jun ;Qi, Jie ;Chen, Ming ;Yuan, Tao ;Zhao, Jun
通讯作者：Dai, Jian Xin
作者机构：[Dai, Jian Xin ] School of Science, Nanjing University of Posts and Telecommunications, Nanjing, China;[Chen, Ming ] National Mobile Communications Re 更多
会议名称：International Conference Machinery, Electronics and Control Simulation, ICMECS 2014
会议日期：September 27, 2014 - September 28, 2014
来源：Applied Mechanics and Materials
摘要：This paper investigated the problem of transmit power minimization to meet the users’ outage probability constraints in downlink smart antennas-MIMO (SA-MIMO) systems. Firstly, a downlink multi-user SA-MIMO system model is established, and the transmit power optimization problem is formulated. The optimization problem jointly optimizes the beam-forming vectors and user outage probability. Then, the outage-based optimization problem is transformed into a geometric programming problem in which the beam forming vectors were obtained by maximum diagonal element (MDE) rule. Some numerical results show that the proposed method in this paper is viable and the transmit power in downlink SA-MIMO systems significantly descreases relative to traditional MIMO systems. © (2014) Trans Tech Publications, Switzerland.