RF power amplifier linearization through amplitude and phase predistortion

Author

Andrea, Aldo N D´ ; Lottici, Vincenzo ; Reggiannini, Ruggero

Author_Institution

Dept. of Inf. Eng., Pisa Univ., Italy

Volume

44

Issue

11

fYear

1996

fDate

11/1/1996 12:00:00 AM

Firstpage

1477

Lastpage

1484

Abstract

This paper presents a novel technique for power amplifier linearization in digital microwave radio systems. The proposed technique is based on the use of a predistortion circuit, whose AM/AM and AM/PM responses are separately implemented as polynomial approximations of the respective responses of the ideal linearizer. The proposed scheme is shown to attain superior performance in comparison with other well-known predistortion structures, such as those based on the cancellation of third or fifth order distortion, with no substantial aggravation in implementation complexity

Keywords

approximation theory; digital radio; linearisation techniques; microwave links; microwave power amplifiers; phase modulation; polynomials; quadrature amplitude modulation; AM/AM response; AM/PM response; QAM; RF power amplifier linearization; amplitude predistortion; digital microwave radio systems; fifth order distortion cancelation; ideal linearizer; performance; phase predistortion; polynomial approximations; predistortion circuit; third order distortion cancellation; Circuits; Constellation diagram; Microwave amplifiers; Microwave theory and techniques; Power amplifiers; Predistortion; Quadrature amplitude modulation; Radio frequency; Radiofrequency amplifiers; Signal sampling;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.544464

Filename

544464