The effect of non-linearity on the performance of the multi-carrier CDMA system

Author

Sourour, Essam A.

Author_Institution

Dept. of Electr. Eng., Alexandria Univ., Egypt

Volume

3

fYear

1996

fDate

28 Apr-1 May 1996

Firstpage

1853

Abstract

A number of multi-carrier DS-CDMA systems have been introduced as alternatives to the conventional single carrier CDMA system. Multi-carrier modulation offers many advantages over single carrier modulation in fading channels, impulsive noise and for high data rate applications. With the availability of fast DSP technology multi-carrier modulation is feasible. A major problem in multi-carrier systems is the intermodulation distortion due to the non-linearity of the power amplifier stage. Since the multi-carrier signal has a large amplitude variation it is subject to AM/AM and AM/PM distortion due to the power amplifiers. This distortion adds to the co-channel interference and causes a significant degradation to the system performance. This papers studies the performance of the multi-carrier CDMA system in an AWGN channel without fading but with amplifier non-linearity

Keywords

Gaussian channels; amplitude modulation; cochannel interference; code division multiple access; fading; frequency modulation; intermodulation distortion; phase modulation; power amplifiers; pseudonoise codes; radiofrequency amplifiers; spread spectrum communication; AM/AM distortion; AM/PM distortion; AWGN channel; amplifier nonlinearity; cochannel interference; fading channels; fast DSP technology; high data rate applications; impulsive noise; intermodulation distortion; large amplitude variation; multicarrier DS-CDMA system; multicarrier modulation; multicarrier signal; power amplifiers; system performance; Additive white noise; Availability; Degradation; Digital signal processing; Fading; Gaussian noise; Interchannel interference; Intermodulation distortion; Multiaccess communication; Power amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th

Conference_Location

Atlanta, GA

ISSN

1090-3038

Print_ISBN

0-7803-3157-5

Type

conf

DOI

10.1109/VETEC.1996.504079

Filename

504079