Title :
Sequence adaptation for interference reduction and capacity maximization in DS-CDMA systems
Author :
Sung, Chi Wan ; Leung, Kin Kwong
Author_Institution :
Dept. of Comput. Sci., City Univ. of Hong Kong, Kowloon, China
Abstract :
The relation between interference reduction and capacity maximization in DS-CDMA systems is investigated. We show that the solution which minimizes the total weighted squared correlation (TWSC) happens to maximize the sum capacity of the system. Furthermore, we show that a distributed sequence adaptation algorithm based on the MMSE receiver reduces TWSC and increases sum capacity simultaneously at each iteration step. Simulation results show that the algorithm converges to the optimal solution
Keywords :
cellular radio; channel capacity; code division multiple access; convergence of numerical methods; interference suppression; iterative methods; least mean squares methods; minimax techniques; radio receivers; spread spectrum communication; DS-CDMA systems; MMSE receiver; TWSC minimization; capacity maximization; cellular radio; convergence; distributed sequence adaptation algorithm; interference reduction; iteration step; optimal solution; sum capacity maximization; total weighted squared correlation; AWGN; Additive white noise; Base stations; Code division multiplexing; Computer science; Correlation; Distributed algorithms; Interference; Multiaccess communication; Power system modeling;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2001 12th IEEE International Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-7244-1
DOI :
10.1109/PIMRC.2001.965424
