Effect of efficiency optimization on linearity of LINC amplifiers with CDMA signal

Author

Jaehyok Yi ; Youngoo Yang ; Bumman Kim

Author_Institution

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

Volume

2

fYear

2001

fDate

20-24 May 2001

Firstpage

1359

Abstract

The linear and efficient power amplification can be achieved with LINC (linear amplification with nonlinear components) amplifiers because RF power amplifiers deal with constant envelope signals in LINC systems. To increase the average efficiency in some modulation schemes with high peak to average ratio, reactance termination in combining circuit is used. However, the shunt reactance termination degrades the linearity performance of LINC. This work shows the effect of efficiency optimization with reactance termination on ACLR (Adjacent Channel Leakage Ratio) of LINC amplifiers with WCDMA modulation systems using envelope simulation.

Keywords

code division multiple access; power amplifiers; radiofrequency amplifiers; CDMA signal; LINC amplifier; RF power amplifier; WCDMA modulation; adjacent channel leakage ratio; combining circuit; efficiency optimization; envelope simulation; linear amplification; linearity; nonlinear component; peak-to-average ratio; shunt reactance termination; wireless communication system; Degradation; Linearity; Microwave amplifiers; Multiaccess communication; Operational amplifiers; Peak to average power ratio; Power amplifiers; RF signals; Radio frequency; Radiofrequency amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2001 IEEE MTT-S International

Conference_Location

Phoenix, AZ, USA

ISSN

0149-645X

Print_ISBN

0-7803-6538-0

Type

conf

DOI

10.1109/MWSYM.2001.967148

Filename

967148