A constrained optimization approach to multiuser detection

Author

Schodorf, Jeffrey B. ; Williams, Douglas B.

Author_Institution

Center for Signal & Image Process., Georgia Inst. of Technol., Atlanta, GA, USA

Volume

45

Issue

1

fYear

1997

fDate

1/1/1997 12:00:00 AM

Firstpage

258

Lastpage

262

Abstract

Interference cancellation or multiuser detection schemes are of great interest to the CDMA community because of their potential ability to treat the near-far problem and significantly reduce interference levels. A linear adaptive multiuser detection scheme based on constrained optimization is presented, constraints are constructed from knowledge of users´ codes and associated timing. Both single- and multiple-constraint detectors are derived and shown to have interesting relationships to existing detectors. Simulation results, presented in the form of bit error rate curves, demonstrate the receiver´s performance in an additive white Gaussian noise (AWGN) channel

Keywords

Gaussian channels; adaptive signal detection; code division multiple access; coding errors; error statistics; interference suppression; optimisation; radio receivers; radiofrequency interference; AWGN channel; CDMA; additive white Gaussian noise channel; bit error rate curves; constrained optimization; interference cancellation; linear adaptive multiuser detection; multiple constraint detectors; receiver performance; simulation results; single constraint detectors; timing; users codes; AWGN; Additive white noise; Bit error rate; Constraint optimization; Detectors; Interference cancellation; Interference constraints; Multiaccess communication; Multiuser detection; Timing;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.552226

Filename

552226