Multi-user interference cancellation technology in the presence of multiple frequency offsets

Author

Kobravi, A. ; Shikh-Bahaei, M.R. ; Lambotharan, S.

Author_Institution

Dept. of Electron. Eng., King´´s Coll. London, London, UK

Volume

1

Issue

1

fYear

2007

fDate

2/1/2007 12:00:00 AM

Firstpage

7

Lastpage

14

Abstract

The performance of multi-user detectors in the presence of multiple frequency offsets under a Rayleigh fading channel environment is analysed, and techniques to estimate and remove multiple frequency offsets (FOs) for successive interference cancellation (SIC) and parallel interference cancellation (PIC) receivers are also proposed. The closed form expressions derived for bit error rate (BER) of SIC and PIC schemes in the presence of multiple FOs have been verified using extensive simulation results. The PIC is shown to be less sensitive to frequency offsets as compared to SIC. It is demonstrated through analytical and simulation results that the proposed frequency offset estimation and correction techniques provide approximately 8 dB gain in the BER performance over conventional SIC and PIC schemes in the presence of multiple frequency offsets.

Keywords

Rayleigh channels; error statistics; frequency estimation; interference suppression; multiuser detection; radio receivers; BER; PIC receivers; Rayleigh fading channel; SIC; bit error rate; multiple frequency offsets estimation; multiuser detectors performance analysis; parallel interference cancellation; successive interference cancellation;

fLanguage

English

Journal_Title

Communications, IET

Publisher

iet

ISSN

1751-8628

Type

jour

DOI

10.1049/iet-com:20050171

Filename

4105973