A new unequal three-tone signal method for AM-AM and AM-PM distortion measurements suitable for characterization of satellite communication transmitters/transponders

Authors
Ghannouchi, EM Wakana, H Tanaka, M
Citation
Em. Ghannouchi et al., A new unequal three-tone signal method for AM-AM and AM-PM distortion measurements suitable for characterization of satellite communication transmitters/transponders, IEEE MICR T, 48(8), 2000, pp. 1404-1407
Citations number
6
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
ISSN journal
00189480 → ACNP
Volume
48
Issue
8
Year of publication
2000
Pages
1404 - 1407
Database
ISI
SICI code
0018-9480(200008)48:8<1404:ANUTSM>2.0.ZU;2-Q
Abstract
A new method for characterization of AM-AM and AM-PM distortion of power am plifiers (PA's) using only power measurements is proposed in this paper. Th is technique was found to be suitable for the characterization of satellite communication transmitters/transponders. It consists of using an unequal t hree-tone signal (UTTS) to drive either the base-station PA's transmitter o r the satellite transponder's PA and to measure the level of this UTTS at t he output of the transmitter/transponder. By comparison of the three tone l evels at the input and output of the transmitter/transponder, one can calcu late the AM-AM compression factor and AM-PM conversion coefficient of the t ransmitter/transponder PA using close-form expressions.