A New Estimation Method of Power Amplifier´s Amplitude and Phase Errors for Adaptive Linearizer using Analog Circuitry

Author

Han, Jae-Hee ; Lee, Duck-Hee ; Nam, Sangwook ; Lim, Jong-Sik

Author_Institution

Inst. of New Media and Comm., Seoul National University, San 56-1 Shinlim-dong, Kwanak-gu, Seoul, Republic of Korea, 151-742, Tel: +82-2-880-8432, jhhan@unmac3.snu.ac.kr

fYear

2002

fDate

23-26 Sept. 2002

Firstpage

103

Lastpage

106

Abstract

Many linearization techniques for RF power amplifer (PA) need an adaptive control system for tracking drifts of the amplifier´s characteristics and maintaining the performance. To do so, the output distortion or error levels should be monitored constantly. In this paper, we present a new method for estimating the PA´s amplitude and phase errors. The proposed method estimates the amplitude and the phase errors separately. Then these two errors are summed for the estimation of the total error. For feasibility of the system, the error surface is measured applying the embodied estimator to a postdistortion linearizer and compared with the third-order intermodulation distortion (IMD3) improvements obtained in the same control range.

Keywords

Adaptive control; Amplitude estimation; Circuits; Error correction; Linearization techniques; Monitoring; Phase estimation; Power amplifiers; Radio frequency; Radiofrequency amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2002. 32nd European

Conference_Location

Milan, Italy

Type

conf

DOI

10.1109/EUMA.2002.339232

Filename

4140312