Characterizing the effects of nonlinear amplifiers on linear modulation for digital portable radio communications

Author

Ariyavisitakul, Sirikiat ; Liu, Ting-ping

Author_Institution

Bellcore, Red Bank, NJ, USA

Volume

39

Issue

4

fYear

1990

fDate

11/1/1990 12:00:00 AM

Firstpage

383

Lastpage

389

Abstract

The design and performance of linear modulation techniques and RF power amplifiers are discussed. Various types of power amplifier are used in the comparison, using simulation, of out-of-band radiation and power efficiency. The designs focus on high-frequency silicon bipolar power amplifiers suitable for low-power portable radio applications. Two different 4-QAM (4-level quadrature amplitude modulation) schemes are compared. Power efficiency as high as 40% can be achieved using a dynamically biased amplifier operating near saturation. The effects of nonlinear distortions from power amplifiers on adjacent channel interference as well as bit and block error rate performance are also investigated

Keywords

amplitude modulation; digital radio systems; mobile radio systems; phase shift keying; power amplifiers; radiofrequency amplifiers; 4-QAM; 4-level quadrature amplitude modulation; 40 percent; QPSK; RF power amplifiers; adjacent channel interference; bit error rate; block error rate; digital portable radio communications; linear modulation; nonlinear amplifiers; nonlinear distortions; out-of-band radiation; power efficiency; Error analysis; High power amplifiers; Interchannel interference; Nonlinear distortion; Power amplifiers; Quadrature amplitude modulation; Quadrature phase shift keying; Radio frequency; Radiofrequency amplifiers; Silicon;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.61360

Filename

61360