Effect of Envelope Detectors and Filters on a Digitally Controlled RF Predistortion System

Author

Teikari, Ilari ; Halonen, Kari

Author_Institution

Electron. Circuit Design Lab., Helsinki Univ. of Technol.

fYear

2006

fDate

11-16 June 2006

Firstpage

1879

Lastpage

1882

Abstract

This paper discusses the effect of different envelope detection methods and anti-aliasing filters on the linearisation ability of a RF predistortion system based on phase and amplitude modulator. Three common envelope detection methods used in RF predistortion systems, namely power detector, logarithmic amplifier and a diode detector are studied. Also the effect of power amplifier nonlinearity on the selection of detector and filters is discussed. Theoretical calculations and simulation results of the effect of detectors and filtering are presented

Keywords

detector circuits; filters; linearisation techniques; modulators; power amplifiers; RF predistortion system; amplifier distortion; amplitude modulator; anti-aliasing filters; digital systems; diode detector; envelope detection methods; linearisation ability; logarithmic amplifier; phase modulator; power detector; Control systems; Digital control; Digital filters; Envelope detectors; Phase detection; Phase modulation; Power amplifiers; Predistortion; Radio frequency; Radiofrequency amplifiers; Amplifier distortion; Digital systems; Filters; Power amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2006. IEEE MTT-S International

Conference_Location

San Francisco, CA

ISSN

0149-645X

Print_ISBN

0-7803-9541-7

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2006.249781

Filename

4015323