Title :
Research of Adaptive Digital Predistortion Technology for Wideband OFDM Power Amplifier
Author :
Wang, Jianxin ; Yu, Jianguo ; Gao, Zhi
Author_Institution :
Beijing Northern FIBERHOME Technol. CO., Ltd., Beijing, China
Abstract :
A adaptive digital predistortion hybrid algorithm of LMS and RLS based on training sequence is proposed, which is applied to a digital pre-distortion system based on polynomial. It can estimation and update adaptive digital pre-distortion filter coefficients. First, This paper was given the configuration of all digital pre-distortion system. Second, adaptive digital predistortion method was realized. A method was simulated by MATLAB software. At last, experimental system was set up and tested experimentation. Simulation results and test results show that wideband power amplifier have better performance based on adaptive digital predistortion method, OFDM power amplifier of linearity is improved 6 dB.
Keywords :
OFDM modulation; adaptive filters; digital filters; polynomials; power amplifiers; wideband amplifiers; MATLAB software; adaptive digital predistortion filter; polynomial; training sequence; wideband OFDM power amplifier; Adaptive filters; Adaptive systems; Broadband amplifiers; Digital filters; Least squares approximation; OFDM; Polynomials; Power amplifiers; Predistortion; Resonance light scattering;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5305066
