Effects of nonlinear distortion on CDMA communication systems

Author

Chen, Seng-Woon ; Panton, William ; Gilmore, Robert

Author_Institution

Qualcomm Inc., San Diego, CA, USA

Volume

44

Issue

12

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

2743

Lastpage

2750

Abstract

We report a rigorous approach to analyze the effects of nonlinear distortion on code division multiple access (CDMA) wireless communication systems based on time-domain analysis and band-pass nonlinearity theory. Given AM-AM and AM-PM characteristics of a nonlinear device, this technique is capable of predicting adjacent channel power rejection (ACPR), noise power ratio (NPR), two-tone intermodulation products, CDMA waveform quality, and baseband signal vector constellation at the output of the nonlinear device. To demonstrate and verify the capability of this technique, an L-band power amplifier was designed, built, tested with CDMA waveforms, and compared with the simulated results. Excellent agreement between the measured and predicted results has been achieved

Keywords

code division multiple access; intermodulation distortion; time-domain analysis; AM-AM characteristics; AM-PM characteristics; CDMA; L-band power amplifier; band-pass nonlinearity theory; baseband signal vector constellation; channel power rejection; code division multiple access; noise power ratio; nonlinear device; nonlinear distortion; time-domain analysis; two-tone intermodulation product; waveform quality; wireless communication system; Baseband; Communication systems; Constellation diagram; L-band; Multiaccess communication; Nonlinear distortion; Power amplifiers; Signal to noise ratio; Time domain analysis; Wireless communication;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.554660

Filename

554660