Title :
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.
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;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249781
