Theoretical analysis and performance of the decorrelating detector for DS-CDMA signals in nonlinear channels

Author

Rugini, Luca ; Banelli, Paolo ; Cacopardi, Saverio

Author_Institution

Dipt. di Ingegneria Elettronica e dell´´Informazione, Univ. di Perugia, Italy

Volume

3

Issue

2

fYear

2004

fDate

3/1/2004 12:00:00 AM

Firstpage

367

Lastpage

372

Abstract

We analyze the effects of the nonlinear distortions, introduced by the transmitting high-power amplifier (HPA), on the performance of the linear decorrelating multiuser detector in direct-sequence code-division multiple-access (DS-CDMA) downlink systems. By assuming and motivating the Gaussian distribution of the nonlinear distortion noise, the symbol-error rate (SER) and the total degradation (TD) has been derived theoretically in additive white Gaussian noise (AWGN) and frequency-flat Rayleigh fading channels. Simulation results show that the analytical model is quite accurate in many scenarios.

Keywords

AWGN channels; Gaussian distribution; Rayleigh channels; code division multiple access; decorrelation; error statistics; multiuser detection; nonlinear distortion; power amplifiers; radiofrequency amplifiers; spread spectrum communication; AWGN channel; DS-CDMA signal; Gaussian distribution; additive white Gaussian noise; decorrelating detector; direct sequence code division multiple access; frequency-flat Rayleigh fading channel; high-power amplifier; linear detector; multiuser detection; nonlinear channels; nonlinear distortion noise; symbol-error rate; AWGN; Additive white noise; Analytical models; Decorrelation; Detectors; Multiaccess communication; Nonlinear distortion; Performance analysis; Signal analysis; Signal detection;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2003.821127

Filename

1271228