Near-far effect resistant multiuser detectors

Author

Monogioudis, Pantelis ; Tafazolli, R. ; Evans, B.G.

Author_Institution

Centre for Satellite Eng. Res., Surrey Univ., Guildford, UK

fYear

1992

fDate

33759

Firstpage

42370

Lastpage

110

Abstract

The optimum and a suboptimum NEar-FAr Resistant (NEFAR) receiver are presented, with the suboptimum decorrelating detector whose complexity is linear with the number of users. There is strong similarity between the decorrelating detector and adaptive equalization structures used extensively in mobile telephony as a means of combating intersymbol interference. These structures are based on linear adaptive equalization technology and their computational complexity is also linear with the number of users, while their performance is only slightly degraded in comparison with the optimum detector. Nonlinear multiuser equalization techniques are addressed. The validity of the main assumption in this analysis, the correct delay estimation, is also discussed

Keywords

adaptive filters; equalisers; multi-access systems; optimal systems; radio receivers; spread spectrum communication; adaptive equalization structures; computational complexity; delay estimation; intersymbol interference; linear adaptive equalization; mobile telephony; multiuser detectors; near-far effect resistance; nonlinear multiuser equalisation; performance; spread spectrum communication; suboptimum decorrelating detector;

fLanguage

English

Publisher

iet

Conference_Titel

Spread Spectrum Techniques for Radio Communication Systems, IEE Colloquium on

Conference_Location

London

Type

conf

Filename

168646