Power control algorithm in cellular systerms
Cai Min, Wei Wang · Control theory & applications · 2006
Power control for wireless cellular system is an importantant technique to minimize the transmitter powers while maintaining acceptable QoS(Quality-of Service).In this paper,a novel distributed power control algorithm based on the stochastic noise and the estimation of signal-interference ratio(SIR) is presented.In this distributed power algorithm,each user iteratively updates its power level by the estimation of SIR.It does not require any knowledge of the channel gains or state information of other users and therefore,the proposed algorithm is robust.Convergence of the algorithm is proven by stochastic approximation approach and simulations are given to show the effecicency of the algorithm.