多输入多输出天线蜂窝系统中的分布式功率控制方法

Distributed Power Control in MIMO Cellular Systems

在蜂窝无线通信系统设计中,基于信号干扰比(SIR)测量的功率控制方法得到广泛的应用。该文提出多输入多输出(MIMO)天线蜂窝系统中的基于SIR 测量的分布式功率控制(DPC)方法。该方法通过控制移动台或者基站的发射功率可以达到以下两个目标的其中之一:(1)最小化所有基站或者移动台的平均接收SIR 中断概率;(2)在满足目标SIR 要求的前提下最小化平均发射功率。数值仿真结果显示,该文提出的DPC 方法在低的计算复杂度下, 可以达到降低SIR 中断概率和减小发射功率的目的。

In the design of cellular radio systems, power control methods based on signal-to-interference ratio （SIR） measurement have been used widely. This paper proposes distributed power control （DPC） methods based on SIR measurement in Multiple-Input Multiple-Output （MIMO） antenna cellular systems. The methods control the transmitter power of mobile stations or base stations with one of the following two objectives： （1） to minimize the averaged SIR outage probability over all base stations or mobile stations and （2） to minimize the averaged transmitter power while satisfying the specified SIR requirements for all links. Numerical study shows that the DPC methods proposed in this paper can effectively lower SIR outage probability and transmitter power at low computation complexity.