Digital implementations of adaptive feedforward amplifier linearization techniques

Author

Zhao, G. ; Ghannouchi, F.M. ; Beauregard, F. ; Kouki, A.B.

Author_Institution

Dept. of Electr. & Comput. Eng., Ecole Polytech. de Montreal, Que., Canada

Volume

2

fYear

1996

fDate

17-21 June 1996

Firstpage

543

Abstract

Feedforward power amplifier linearizers using complete digital adaptive control algorithms are proposed. Two different versions, one using frequency domain cancellation and the other using a power gradient approach, are developed. Simulation results, showing carrier signal cancellation in the first loop and distortion cancellation in the second loop for both methods, are presented. This study demonstrates that digital adaptive implementation of feedforward linearization is indeed a promising approach.

Keywords

adaptive control; electric distortion; feedforward; linearisation techniques; power amplifiers; radiofrequency amplifiers; adaptive control algorithms; adaptive feedforward amplifier linearization; carrier signal cancellation; digital implementations; distortion cancellation; frequency domain cancellation; power amplifier linearizers; power gradient algorithm; Adaptive control; Digital control; Digital modulation; Directional couplers; Distortion; Frequency domain analysis; Linearization techniques; Power amplifiers; Power engineering and energy; Power engineering computing;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1996., IEEE MTT-S International

Conference_Location

San Francisco, CA, USA

ISSN

0149-645X

Print_ISBN

0-7803-3246-6

Type

conf

DOI

10.1109/MWSYM.1996.510992

Filename

510992