Power control algorithm in CDMA systems using symmetric successive overrelaxation iteration

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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  • Kwok-Kai Soo
  • Lei Zhao
  • Lin Yang
  • Ru-Shan Chen

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Original languageEnglish
Pages (from-to)583-589
Journal / PublicationEuropean Transactions on Telecommunications
Issue number6
Publication statusPublished - Nov 2005


System capacity is the paramount requirement in the design of code division multiple access (CDMA) cellular systems. Power control to mobiles is an essential tool used to maximise the system capacity by minimising interference while at the same time maintaining transmission quality. The convergence speed of power control algorithm is critical in determining its practical application especially when the propagation and traffic condition are rapidly changing. In this letter, a new centralised power control algorithm is proposed to solve the power control problem by using symmetric successive overrelaxation (SSOR) preconditioned generalised product-type bi-conjugate gradient (GPBi-CG) iteration method. The simulation results show that our proposed algorithm has much faster convergent rate than the distributive constrained second-order power control (CSOPC) and constrained Gauss-Seidel (CGS) algorithm. The fast convergent speed can increase the overall network capacity. Copyright © 2005 AEIT.

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