Transmitter linearization using Cartesian feedback for linear TDMA modulation

Author

Johansson, Mats ; Mattsson, Thomas

Author_Institution

Dept. of Appl. Electron., Lund Univ., Sweden

fYear

1991

fDate

19-22 May 1991

Firstpage

439

Lastpage

444

Abstract

A linearized power amplifier suitable for low-power portable radio applications is described. One narrow-bandwidth and one wide-bandwidth application are investigated. Up to 40% power-added efficiency can be achieved for a 20-dB reduction of the third-order intermodulation products at 1.5 MHz from the carrier frequency in the wide-bandwidth system. Less than -60 dB out-of-band emission and 38% power-added efficiency can be obtained for a narrow-bandwidth system

Keywords

feedback; linearisation techniques; mobile radio systems; power amplifiers; radio transmitters; radiofrequency amplifiers; time division multiple access; 38 percent; 40 percent; Cartesian feedback transmitter; carrier frequency; linear TDMA modulation; linearized power amplifier; low-power portable radio applications; narrow-bandwidth system; out-of-band emission; power-added efficiency; third-order intermodulation products; wide-bandwidth system; Amplitude modulation; Bandwidth; Cutoff frequency; Feedback; Personal communication networks; Phase modulation; Power amplifiers; Radio transmitters; Radiofrequency amplifiers; Time division multiple access;

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.1991.140527

Filename

140527