Title :
AM-AM and AM-PM distortion characterization of satellite transponders/base station transmitters using spectrum measurements
Author :
Ghannouchi, Fadhel M. ; Ghazel, Adel
Author_Institution :
Dept. of Electr. Eng., Montreal Univ., Que., Canada
Abstract :
This paper proposes a method for measuring AM-AM and AM-PM distortion of power amplifiers (PAs) of satellite transponders and base station transmitters using power spectrum measurements. It consists of using unequal three-tone signal to drive either the base station power amplifier´s transmitter or the satellite transponder´s power amplifier and to measure the level of these tones at the output of the transmitter/transponder. By comparison of the spectrum at the input and output of the PA, one can calculate the AM-AM compression factor and the AM-PM conversion coefficient of the power amplifier of the transmitter or transponder using close form expressions.
Keywords :
amplitude modulation; distortion measurement; phase modulation; power amplifiers; power measurement; satellite links; transponders; AM-AM compression factor; AM-AM distortion; AM-PM conversion coefficient; AM-PM distortion; base station transmitter; power amplifier transmitter; power spectrum measurement; satellite transponder; Base stations; Distortion measurement; Linearity; Nonlinear distortion; Power amplifiers; Power measurement; Radio transmitters; Radiofrequency amplifiers; Satellite broadcasting; Transponders;
Conference_Titel :
Recent Advances in Space Technologies, 2003. RAST '03. International Conference on. Proceedings of
Conference_Location :
Istanbul, Turkey
Print_ISBN :
0-7803-8142-4
DOI :
10.1109/RAST.2003.1303897
