Spreading code selection and power control strategy for warp converging multiuser detection in asynchronous CDMA systems

Author

Wang, Xiaoli ; Ge, Hongya

Author_Institution

Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA

fYear

2012

fDate

25-30 March 2012

Firstpage

2997

Lastpage

3000

Abstract

In this work, we study the eigen-structure of the data covariance matrix in an asynchronous CDMA system. Our results reveal the joint effect of spreading codes and power control on warp converging Wiener filters. We further provide suggestions on spreading code selection and power control strategy in CDMA system design, where stable and predictable early convergence of the reduced-rank conjugate gradient Wiener filter (RRCG-WF) based multiuser detection (MUD) can be obtained.

Keywords

Wiener filters; code division multiple access; conjugate gradient methods; covariance matrices; eigenvalues and eigenfunctions; multiuser detection; MUD; RRCG-WF; Wiener filter; asynchronous CDMA system; data covariance matrix; eigen-structure; multiuser detection; power control strategy; reduced-rank conjugate gradient method; spreading code selection; warp convergence; Convergence; Covariance matrix; Eigenvalues and eigenfunctions; Gold; Multiaccess communication; Multiuser detection; Power control;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing (ICASSP), 2012 IEEE International Conference on

Conference_Location

Kyoto

ISSN

1520-6149

Print_ISBN

978-1-4673-0045-2

Electronic_ISBN

1520-6149

Type

conf

DOI

10.1109/ICASSP.2012.6288545

Filename

6288545