Digital Predistortion Based on QRD-RLS Algorithm and Its Implementation Using FPGA

Author

Zheng Ningjing ; Chen Yuelin ; Wu Xiaofang ; Shi Jianghong

Author_Institution

Dept. of Commun. Eng., Xiamen Univ., Xiamen, China

fYear

2009

fDate

26-28 Dec. 2009

Firstpage

200

Lastpage

203

Abstract

To reduce the nonlinear distortion caused by RF power amplifier (PA) in wireless transmission system, digital predistortion is widely used for PA linearization. This paper mainly discusses on the memory polynomial predistortion based on QRD-RLS algorithm, which is analyzed in the MATLAB simulation. It is also discussed about the Systolic implementation of complex QRD-RLS algorithm based on CORDIC technique. At last, with System Generator, the system of digital predistortion based on QRD-RLS algorithm is designed on FPGA, and the system is verified in hardware platform.

Keywords

field programmable gate arrays; nonlinear distortion; power amplifiers; radiocommunication; radiofrequency amplifiers; signal processing; CORDIC technique; FPGA; MATLAB simulation; PA linearization; QRD-RLS algorithm; RF power amplifier; digital predistortion system; memory polynomial predistortion; nonlinear distortion; recursive least square technique; system generator; wireless transmission system; Algorithm design and analysis; Analytical models; Field programmable gate arrays; MATLAB; Nonlinear distortion; Polynomials; Power amplifiers; Predistortion; Radio frequency; Radiofrequency amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Science and Engineering (ICISE), 2009 1st International Conference on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-4909-5

Type

conf

DOI

10.1109/ICISE.2009.503

Filename

5455673