Fully-automated adaptive analog predistortion power amplifier in WCDMA applications

Author

Lee, Seung-Yup ; Lee, Yong-Sub ; Jeong, Yoon-Ha

Author_Institution

Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol., Gyungbuk, South Korea

Volume

2

fYear

2005

fDate

4-6 Oct. 2005

Abstract

This paper represents a fully-automated adaptive analog predistortion power amplifier for repeater systems with digital signal processor (DSP) control of a spectrum monitor, which detects the output spectrum of the RF power amplifier and improves the linearity automatically by controlling the gate bias voltage of the main power amplifier and the vector modulator of the analog predistorter. We implement a 30 W class AB power amplifier that adopts a general 3^rd-order predistorter with the spectrum monitor in the wideband code division multiple access (WCDMA) band. In this system, all operations for the linearization are achieved fully automatically under various power levels and temperatures.

Keywords

code division multiple access; distortion; power amplifiers; repeaters; 30 W; 3rd-order predistorter; RF power amplifier; WCDMA applications; WCDMA band; adaptive power amplifier; analog power amplifier; analog predistorter; digital signal processor control; fully-automated power amplifier; gate bias voltage; predistortion power amplifier; repeater systems; spectrum monitor; vector modulator; wideband code division multiple access; Adaptive control; Automatic voltage control; Broadband amplifiers; Control systems; Multiaccess communication; Power amplifiers; Predistortion; Programmable control; Radiofrequency amplifiers; Repeaters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2005 European

Print_ISBN

2-9600551-2-8

Type

conf

DOI

10.1109/EUMC.2005.1610089

Filename

1610089