软降功率控制-一种功率控制回退策略

S. Gupta, R. Yates, C. Rose
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引用次数: 10

摘要

对于无线通信系统,本工作考虑了一种功率控制算法,其中用户的链路质量目标(由信号干扰比(SIR)测量)随其发射机功率而变化。特别是,当增加的干扰或减少的上行增益导致移动设备提高其发射机功率时,该移动设备会降低其SIR目标。这样,就减少了用户发射机功率达到最大值时出现不可行的功率控制问题的可能性。这种优雅的SIR退化被称为软下降。给出了一种软降功率控制算法的收敛性证明。对一个通用CDMA系统的仿真结果表明,与固定目标SIR算法相比,SIR算法的性能有所提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Soft dropping power control-a power control backoff strategy
For wireless communications systems, this work considers a power control algorithm in which a user's link quality objective, as measured by the signal to interference ratio (SIR), varies with its transmitter power. In particular, as increased interference or reduced uplink gain leads a mobile to raise its transmitter power, that mobile lowers its SIR target. In this way, the likelihood of an infeasible power control problem in which the users' transmitter powers rise to a maximum, is reduced. This graceful degradation of the SIR is termed soft dropping. Convergence proofs for a soft dropping power control algorithm are presented. Simulation results for a generic CDMA system demonstrate performance improvements over fixed target SIR algorithms.
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