Error sensitivity of power amplifiers using pre-distortion

Author

Faulkner, Michael ; Johansson, Mats ; Yates, Warren

Author_Institution

Dept. of Electr. & Electron. Eng., Victoria Univ. of Technol., Melbourne, Vic., Australia

fYear

1991

fDate

19-22 May 1991

Firstpage

451

Lastpage

456

Abstract

Misalignment between the predistortion correction tables and the nonlinearity of a high-power amplifier produces incomplete cancellation of the nonlinear components in the output signal. The misalignment caused by the modulation and upconversion circuits as well as temperature and loading changes has been analyzed by simulation. For the amplifier chosen, there is a simple power relationship between the adjacent channel leakage (a measure of the misalignment) and many of the tested parameters (carrier leak, differential gain, temperature change, etc.)

Keywords

errors; linearisation techniques; power amplifiers; radio transmitters; radiofrequency amplifiers; adjacent channel leakage; carrier leak; differential gain; error sensitivity; linearisation techniques; loading changes; modulation circuits; nonlinear component cancellation; power amplifier nonlinearity; predistortion correction tables; radiofrequency amplifiers; temperature change; transmitter; upconversion circuits; Analytical models; Circuit simulation; Circuit testing; Differential amplifiers; Gain measurement; High power amplifiers; Power amplifiers; Power measurement; Predistortion; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1991. Gateway to the Future Technology in Motion., 41st IEEE

Conference_Location

St. Louis, MO

ISSN

1090-3038

Print_ISBN

0-87942-582-2

Type

conf

DOI

10.1109/VETEC.1991.140529

Filename

140529