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

fYear

2006

fDate

14-17 Nov. 2006

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/TENCON.2006.344203

Filename

4142633