CDMA功率控制研究中目标SIR设置的上限

基于SIR平衡的功率控制可能存在正反馈的问题,从而使得系统不稳定.讨论了在加性高斯白噪声及Rayleigh衰落信道下,CDMA上行链路闭环功率控制系统的SIR上限问题.通过折衷考虑系统的容量与QoS要求,可以确定临界稳定时的目标SIR上限,在设计功率控制算法时,目标SIR只有满足上限要求,才能确保CDMA系统稳定.

Upper Bound for Reference SIR Setting in CDMA Power Control

SIR balance based power control may h ave the problem of p ositive feedback,which will endanger the sys-tem stability.This paper discuss es the upper bound for the reference SIR setting under AWGN and Rayleigh chan ne l.Consider-ing the trade-off between the number of users and the QoS in CDMA systems,t he upper bound of the reference SIR can be set.When designing the p ower contro l algorithms,only if the reference S IR meets the upper bound condi tion,t he CDMA sys-tem can be assured stable.