Research of adaptive digital predistortion technology for wideband OFDM power amplifier

Authors:
Jianxin Wang;Jianguo Yu;Zhiguo Gao
Affiliations:
Beijing Northern FIBERHOME Technologies CO., LTD, Beijing, China;State Key Laboratory of Optical Communication Technologies and Networks, Wuhan, China;State Key Laboratory of Optical Communication Technologies and Networks, Wuhan, China
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

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Abstract

A adaptive digital pre-distortion 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 pre-distortion 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 pre-distortion method, OFDM power amplifier of linearity is improved 6 dB.