Performance of various multistage interference cancellation schemes for asynchronous QPSK/DS/CDMA over multipath Rayleigh fading channels

Author

Weng, Jian F. ; Le-Ngoc, Tho ; Xue, Guo Q. ; Tahar, Sofiène

Author_Institution

Sapphire R&D Inc., Canada

Volume

49

Issue

5

fYear

2001

fDate

5/1/2001 12:00:00 AM

Firstpage

774

Lastpage

778

Abstract

The performance of multistage interference cancellation (MIC) and three combining techniques, i.e., multipath decorrelating (MIC-DECO), optimum combining (MIC-OPTM), and RAKE combining (MIC-RAKE) for asynchronous quadrature phase-shift keying/direct-sequence code-division multiple access over frequency-selective multipath Rayleigh fading channels is studied. The analytical bit-error probabilities of the MIC-DECO and MIC-OPTM are derived and shown to be in a good agreement with simulation results. Both analytical and simulation results show that the MIC-DECO, MIC-OPTM, and MIC-RAKE in a multiuser environment provide a good performance close to the ideal performance in a single-user system even in the presence of channel estimation error

Keywords

Rayleigh channels; code division multiple access; decorrelation; error statistics; interference suppression; multipath channels; multiuser channels; quadrature phase shift keying; radiofrequency interference; spread spectrum communication; MIC-DECO; MIC-OPTM; MIC-RAKE; RAKE combining; asynchronous QPSK/DS-CDMA; asynchronous quadrature phase-shift keying; bit-error probabilities; channel estimation error; combining techniques; direct-sequence code-division multiple access; frequency-selective channels; multipath Rayleigh fading channels; multipath decorrelating; multistage interference cancellation; multiuser environment; optimum combining; performance; simulation results; single-user system; Analytical models; Channel estimation; Decorrelation; Direct-sequence code-division multiple access; Fading; Frequency; Interference cancellation; Microwave integrated circuits; Performance analysis; Phase shift keying;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.923800

Filename

923800