Nonlinearity estimation in power amplifiers based on subsampled temporal data

Author

Ibanez-Diaz, J. ; Pantaleón, Carlos ; Santamaría, Ignacio ; Fernández, Tomás ; Martínez, David

Author_Institution

Dept. Ingenieria de Commun., Cantabria Univ., Santander, Spain

Volume

50

Issue

4

fYear

2001

fDate

8/1/2001 12:00:00 AM

Firstpage

882

Lastpage

887

Abstract

In this paper we apply subsampling techniques to capture the temporal input-output relationship of RF power amplifiers. This approach avoids the distortion introduced by the upconverter and downconverter stages. We develop polynomial models with memory from the available data and evaluate their performance by estimating device parameters such as adjacent channel power ratio and AM-AM curves. The estimated parameters show good agreement with the empirical ones

Keywords

OFDM modulation; UHF power amplifiers; amplitude estimation; analogue-digital conversion; nonlinear distortion; nonlinear estimation; polynomials; signal sampling; ADC; AM-AM curves; OFDM signal; RF power amplifiers; adjacent channel power ratio; distortion; nonlinearity estimation; polynomial models with memory; subsampled temporal data; subsampling techniques; temporal input-output relationship; Broadband amplifiers; Digital signal processing; Frequency conversion; Nonlinear distortion; Polynomials; Power amplifiers; Power system modeling; Radio frequency; Radiofrequency amplifiers; Sampling methods;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.948293

Filename

948293