Optimized Power Control Using LQ Scheme for CDMA Systems

Ji-Young BYUN  Young-Chai KO  Kwan-Ho YOU  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E87-A   No.11   pp.2909-2912
Publication Date: 2004/11/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Concurrent Systems and Hybrid Systems)
optimal power control,  LQR,  CDMA,  SIR,  mobile communication,  

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In this paper, we propose an optimal power control algorithm with fast convergence rate for CDMA cellular systems. The new power control algorithm is based on linear quadratic control theory (LQR). Using the state feedback control designed to minimize an objective function, each mobile performs a successful transmission with optimal power. Simulation results show a fast convergence rate to target SIR with less power consumption, and an augmented channel capacity through decreased outage probability.