Title :
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
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;
Conference_Titel :
Information Science and Engineering (ICISE), 2009 1st International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4909-5
DOI :
10.1109/ICISE.2009.503
