论文标题
研究多 - 安特纳系统下行链路的强大自适应分配的研究
Study of Robust Adaptive Power allocation for the Downlink of Multiple-Antenna Systems
论文作者
论文摘要
多输入多输出（MIMO）系统大大增加了无线系统的总体吞吐量，因为它们能够使用相同的时频资源传输多个流。但是，这种增益需要适当的预编码器设计和功率分配技术。一般而言，设计完美的渠道遗产信息（CSI），设计了预编码和电源分配方案。但是，这是一个乐观的假设，因为实际系统仅在发射机（CSIT）上具有部分或不完善的CSI。不完美的CSIT起源于残留的用户干扰，这对无线系统有害。在本文中，提出了两种自适应能力分配算法，它们比传统技术更强大。这两种技术都采用均方误差作为目标函数。仿真结果表明，所提出的技术比传统方法获得的总和比率更高。
Multiple-input multiple-output (MIMO) systems greatly increase the overall throughput of wireless systems since they are capable of transmitting multiple streams employing the same time-frequency resources. However, this gain requires an appropriate precoder design and a power allocation technique. In general, precoders and power allocation schemes are designed assuming perfect channel estate information (CSI). Nonetheless, this is an optimistic assumption since real systems only possess partial or imperfect CSI at the transmitter (CSIT). The imperfect CSIT originates residual inter-user interference, which is detrimental for wireless systems. In this paper, two adaptive power allocation algorithms are proposed, which are more robust against CSIT imperfections than conventional techniques. Both techniques employ the mean square error as the objective function. Simulation results show that the proposed techniques obtain a higher performance in terms of sum-rate than conventional approaches.
