Title :
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
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;
Conference_Titel :
Electrical and Computer Engineering (CCECE), 2011 24th Canadian Conference on
Conference_Location :
Niagara Falls, ON
Print_ISBN :
978-1-4244-9788-1
Electronic_ISBN :
0840-7789
DOI :
10.1109/CCECE.2011.6030535
