Evaluation of a digital predistion on FPGA for power amplifier linearization

Author

Julius, S. ; Dinh, Anh

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Saskatchewan, Saskatoon, SK, Canada

fYear

2011

fDate

8-11 May 2011

Abstract

One of the issues of power amplifier used in satellite communications is its nonlinearity. Digital predistortion is used in a linearizer to inverse this undesired effect to achieve higher efficiency to the amplifier. Xilinx provides a predistortion core to be implemented in FPGA devices. The core is used in a linearizer to test its functionality and performance. Simulation results indicate a gain of 11dB in reduction of spectrum regrowth in OFDM signal transmission. Hardware experiments reveal a 4dB gain can be obtained in practical application. Only a moderate resource of FPGA is needed to implement the digital predistortion core.

Keywords

OFDM modulation; field programmable gate arrays; power amplifiers; satellite communication; FPGA devices; OFDM signal transmission; Xilinx; digital predistortion; gain 11 dB; gain 4 dB; power amplifier linearization; predistortion core; satellite communications; Adaptation models; Field programmable gate arrays; Hardware; OFDM; Predistortion; Radio frequency; Power amplifier nonlinearity; digital predistortion; linearizer; satellite communications;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering (CCECE), 2011 24th Canadian Conference on

Conference_Location

Niagara Falls, ON

ISSN

0840-7789

Print_ISBN

978-1-4244-9788-1

Electronic_ISBN

0840-7789

Type

conf

DOI

10.1109/CCECE.2011.6030535

Filename

6030535