Title :
A Method to Compute All Fixed Points for the Iterative MUD of CDMA Systems with Chip-Level Interleavers
Author :
Lau, Mark S K ; Yue, Wuyi ; Ping, Li ; Li, Duan
Author_Institution :
Inst. of Intelligent Inf. & Commun. Technol., Konan Univ., Kobe
Abstract :
This paper proposes a simple method to compute all fixed points for the iterative MUD of CDMA systems with chip-level interleavers. The task of finding all fixed points is difficult because a set of nonlinear equations with multiple variables has to be solved. It is shown that this set of equations can be reduced to an equivalent equation with just one variable. As a result, all fixed points can be obtained by simply locating the roots of this univariate equation. An application of the proposed method in optimal power allocation with a numerical example is presented as well
Keywords :
code division multiple access; iterative methods; multiuser detection; nonlinear estimation; CDMA system; chip-level interleaver; code division multiple access; iterative MUD; multiuser detection; nonlinear equation; Communications technology; Information science; Iterative decoding; Iterative methods; Multiaccess communication; Multiuser detection; Nonlinear equations; Research and development management; Signal to noise ratio; Systems engineering and theory;
Conference_Titel :
TENCON 2006. 2006 IEEE Region 10 Conference
Conference_Location :
Hong Kong
Print_ISBN :
1-4244-0548-3
Electronic_ISBN :
1-4244-0549-1
DOI :
10.1109/TENCON.2006.344203
