A dual-mode multiuser detector for DS-CDMA systems

Author

Fan, Mingxi ; Siu, Kai-Yeung

Author_Institution

Lab. for Inf. & Decision Syst., MIT, Cambridge, MA, USA

Volume

20

Issue

2

fYear

2002

fDate

2/1/2002 12:00:00 AM

Firstpage

303

Lastpage

309

Abstract

We introduce a dual-mode multiuser detector that dynamically switches its detection mode between matched-filter and decorrelator operations based on the channel characteristics. This detector significantly reduces the overall computational requirement while maintaining similar performance as that of the decorrelator. The switching mechanism of our dual-mode detector is designed by exploiting the performance-complexity tradeoff between the decorrelator and the matched-filter. Extensions of this idea to other types of multiuser detectors are also proposed

Keywords

cellular radio; code division multiple access; computational complexity; decorrelation; filtering theory; interference suppression; matched filters; multiuser channels; radio receivers; radiofrequency interference; signal detection; spread spectrum communication; DS-CDMA systems; additive white Gaussian noise channel; cellular radio; channel characteristics; computational requirement reduction; decorrelator; direct sequence-code division multiple access; dual-mode multiuser detector; frequency nonselective AWGN channel; matched filter; multiple access interference suppression; performance-complexity tradeoff; receiver design; receiver perforrnance; switching mechanism; AWGN; Bit error rate; Computational complexity; Decorrelation; Detectors; Matched filters; Multiaccess communication; Multiple access interference; Quality of service; Switches;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.983345

Filename

983345