Title :
An improved second-order power control iterative algorithm
Author :
Wu, Linjun ; Zhu, Shihua ; Feng, Xingle
Author_Institution :
Sch. of Electron. & Inf. Eng., Xi´´an Jiaotong Univ., China
Abstract :
An improved second-order power control (ISOPC) algorithm for code division multiple access (CDMA) systems is proposed in order to improve the convergence speed in distributed carrier-to-interference ratio balance algorithm. By adopting soft optimum coefficient, the ISOPC algorithm uses current and previous power levels for power updates. Convergence analysis is performed and the condition of ISOPC convergence is provided for feasible systems. The simulation indicates that when soft optimum coefficient equal to 1.2, the ISOPC algorithm has faster convergence speed compared to the second-order power control (SOPC) algorithm.
Keywords :
code division multiple access; convergence of numerical methods; iterative methods; power control; radiofrequency interference; telecommunication control; CDMA systems; code division multiple access; convergence speed; distributed carrier-to-interference ratio balance algorithm; iterative algorithm; second-order power control; Algorithm design and analysis; Analytical models; Convergence; Distributed control; Eigenvalues and eigenfunctions; Iterative algorithms; Multiaccess communication; Multiple access interference; Performance analysis; Power control;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on
Print_ISBN :
0-7803-7822-9
DOI :
10.1109/PIMRC.2003.1260418
