Title :
A novel predistorter model for digital predistortion of RF power amplifiers
Author :
Guo, X. Bin ; Jin, Long ; Tang, Wei ; Chen, H. Bo
Author_Institution :
Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Power amplifiers (PAs) are inherently nonlinear devices and are used in virtually all kinds of communication systems. Whereas, digital predistortion (DPD) is one of the cost-effective ways to improve the linearization performance of PAs. In this paper, a novel perdistorter model, which is used in digital predistortion of RF power amplifiers and based on the sum of sin function, is proposed. In the first stage, the new model is simulated in the MATLAB, then it is implemented by FPGA after accomplishing it´s feasibility verification. Finally, the model is applied into the digital predistortion system and validated it´s factual performance. The results show that the new predisdorter model can achieve better ACPR(Adjacent Channel Power Ratio) of the PAs´ output signal when compared with the conventional polynomial predistorter model.
Keywords :
electronic engineering computing; field programmable gate arrays; power amplifiers; radiofrequency amplifiers; ACPR; DPD; FPGA; Matlab; RF power amplifier; adjacent channel power ratio; digital predistortion; linearization performance; nonlinear device; polynomial predistorter model; Field programmable gate arrays; MATLAB; Mathematical model; Polynomials; Predistortion; Radio frequency; Digital predictortion (DPD); FPGA; MATLAB; Power amplifiers(PAs); perdistorter model;
Conference_Titel :
Microwave and Millimeter Wave Circuits and System Technology (MMWCST), 2012 International Workshop on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4673-1893-8
DOI :
10.1109/MMWCST.2012.6238114
