IJPAM: Volume 11, No. 4 (2004)

THE APPLICATION OF LOG BARRIER
ALGORITHM FOR MULTIUSER DETECTION IN CDMA

Chengxian Xu$^1$, Fengmin Xu$^2$, Xinhui Wang$^3$
$^{1,2}$Department of Mathematics
Xian Jiaotong University
Xian, Shaanxi 710049, P.R. CHINA
$^1$e-mail: disxcx@nus.edu.sg
$^2$e-mail: fengminxu@mail.xjtu.edu.cn
$^3$Department of Mathematics
Xidian University
Xian, Shaanxi 710071, P.R. CHINA
e-mail: xinhui_wang@hotmail.com


Abstract.In this paper, a detection strategy based on a log barrier algorithm of the CDMA maximum likelihood (ML) multiuser detection problem is presented. The log barrier algorithm based on semidefinite programming is proposed to solve multiuser detection problem, which is global convergence. Simulations demonstrate that the log barrier algorithm have the similar BER performances of the multiuser detection problem to the interior point methods based on semidefinite programming design. But the average CPU time of this approach is significantly reduced.

Received: December 12, 2003

AMS Subject Classification: 90C22, 90C30

Key Words and Phrases: code division multiple access, multiuser detection, log barrier algorithm, semidefinite programming

Source: International Journal of Pure and Applied Mathematics
ISSN: 1311-8080
Year: 2004
Volume: 11
Issue: 4