Adaptive baseband/RF predistorter for power amplifiers through instantaneous AM-AM and AM-PM characterization using digital receivers

Author

Jeckeln, E.G. ; Beauregard, F. ; Sawan, M.A. ; Ghannouchi, F.M.

Author_Institution

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

Volume

1

fYear

2000

fDate

11-16 June 2000

Firstpage

489

Abstract

This paper presents a powerful adaptive based band/RF predistorter, which uses advantageously the concept of digital receiver technology into power amplifier (PA) linearization area. The linearizer performs an instantaneous characterization of the PA using two digital receivers to supply its AM-AM and AM-PM transfer functions. W-CDMA signals applying different stress levels on PA are used to evaluate the performance of the predistorter. The entire system is validated using DSP/RF co-simulation for a typical class AB power amplifier. Results from different cases of standards signals reveal a significant reduction in effective output power back off (OBO).

Keywords

circuit simulation; code division multiple access; digital radio; linearisation techniques; microwave power amplifiers; mobile radio; radio transmitters; DSP/RF co-simulation; W-CDMA signals; adaptive baseband/RF predistorter; class AB power amplifier; digital receivers; effective output power back off; instantaneous AM-AM characterization; instantaneous AM-PM characterization; power amplifier linearization; power amplifiers; Baseband; Linearity; Multiaccess communication; Power amplifiers; Power generation; Predistortion; RF signals; Radio frequency; Radio transmitters; Radiofrequency amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest. 2000 IEEE MTT-S International

Conference_Location

Boston, MA, USA

ISSN

0149-645X

Print_ISBN

0-7803-5687-X

Type

conf

DOI

10.1109/MWSYM.2000.861085

Filename

861085