Multiuser detector performance comparisons in multirate CDMA systems

Author

Juntti, Markku J.

Author_Institution

Telecommun. Lab., Oulu Univ., Finland

Volume

1

fYear

1998

fDate

18-21 May 1998

Firstpage

31

Abstract

The performance of the multi-code (MC) access system with one processing gain and the multiple processing gain (MPG) access for asynchronous multirate code-division multiple-access (CDMA) systems are considered. The bit error rates (BER) of the decorrelating, parallel interference canceler (PIC) and groupwise serial interference canceler (GSIC) with either the PIC or decorrelator within the group are compared. The results show that the decorrelating and the GSIC multiuser detectors yield the best performance. For all interference cancellation schemes the BER saturates at high SNRs due to decision errors degrading the multiple-access interference (MAI) estimates. The problem is particularly severe with the PIC detector

Keywords

cellular radio; code division multiple access; correlation methods; error statistics; interference suppression; land mobile radio; pseudonoise codes; radiofrequency interference; signal detection; spread spectrum communication; BER; DS-CDMA; MAI estimates; asynchronous multirate code-division multiple-access; bit error rates; cellular mobile communication systems; decision errors; decorrelating parallel interference canceler; decorrelator; direct-sequence spread-spectrum modulation; groupwise serial interference canceler; interference cancellation; multi-code access system; multiple processing gain access; multiple-access interference; multirate CDMA systems; multiuser detector; performance; performance comparisons; Bit error rate; Decorrelation; Degradation; Detectors; Interference cancellation; Mobile communication; Multiaccess communication; Multiple access interference; Performance gain; Telecommunications;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1998. VTC 98. 48th IEEE

Conference_Location

Ottawa, Ont.

ISSN

1090-3038

Print_ISBN

0-7803-4320-4

Type

conf

DOI

10.1109/VETEC.1998.686467

Filename

686467