Behavioural modelling of RF power amplifiers using modified Volterra series in the time domain

Author

Dooley, John ; O´Brien, Bill ; Brazil, Thomas J.

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. Coll. Dublin, Ireland

fYear

2004

fDate

6-7 Sept. 2004

Firstpage

169

Lastpage

174

Abstract

This paper presents a new method for the extraction of a behavioural model of an RF power amplifier using the complex envelope representations of the input and output signals in the time domain. A quasi-memory less model is extracted, and used to represent the nonlinearities of the device. The coefficient values are estimated for Volterra filters which are added in parallel to characterise the memory effects of the device. Compared with classic memoryless models, this model provides a more accurate prediction of the actual power amplifier output signal in both the time and frequency domains.

Keywords

Volterra series; nonlinear network analysis; power amplifiers; radiofrequency amplifiers; time-frequency analysis; RF power amplifier behavioural modelling; Volterra filter coefficient values; complex envelope representations; device memory effects; device nonlinearities; nonlinear models; quasi-memoryless model; time domain Volterra series; time-frequency domain analysis; Circuit simulation; High power amplifiers; Kernel; Microwave amplifiers; Nonlinear systems; Power amplifiers; Power system modeling; Predictive models; Radio frequency; Radiofrequency amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

High Frequency Postgraduate Student Colloquium, 2004

Print_ISBN

0-7803-8426-1

Type

conf

DOI

10.1109/HFPSC.2004.1360381

Filename

1360381