New suboptimal multiuser detectors for synchronous CDMA systems

Author

Wu, Bo ; Wang, Qiang

Author_Institution

Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada

Volume

44

Issue

7

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

782

Lastpage

785

Abstract

In code-division multiple access (CDMA) systems, the optimal multiuser detection is equivalent to an unconstrained quadratic bivalent optimization problem, and its computational complexity increases exponentially with the number of users. In this paper, we propose several new suboptimal detectors with a greatly reduced computational complexity based on a local minimization algorithm for a synchronous CDMA system. The performances of these detectors are compared with those of the conventional, optimal, and several other suboptimal detectors

Keywords

code division multiple access; computational complexity; error statistics; minimisation; receivers; signal detection; synchronisation; code-division multiple access; computational complexity; local minimization algorithm; optimal multiuser detection; performances; suboptimal multiuser detectors; synchronous CDMA systems; unconstrained quadratic bivalent optimization problem; AWGN; Code division multiplexing; Computational complexity; Detectors; Frequency; Interference; Minimization methods; Multiaccess communication; Multiuser detection; Signal processing algorithms;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.508296

Filename

508296