文章基本信息

标题：An FPGA-based Technique for Linearizing RF Power Amplifiers
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作者：Mohammad Reza Mahmoodi ; Zahra Fahimi
期刊名称：International Journal of Mechatronics, Electrical and Computer Technology
印刷版ISSN：2305-0543
出版年度：2016
卷号：6
期号：20
页码：2810-2819
出版社：Austrian E-Journals of Universal Scientific Organization
摘要：In this paper, an efficient predistortion method for linearization of RF power amplifiers is proposed. In this technique, appropriate signals are added to the main baseband input signal to reduce the nonlinearity of the PA. The non-linear relationship between input and output of an RF PA is analyzed and optimum values for the injection signals at the intermodulation frequencies are obtained. In addition, a high-speed low-cost MATLAB-FPGA interface is designed that can be used both in the training and testing phases of the system. Simulation results indicate that the proposed technique is capable of remarkably reducing spectral regrowth in adjacent channels for different non-constant envelope signals. Using a QPSK signal, the spectral regrowth and ACPR of the PA are decreased by 20dB and 26dB, respectively.
关键词：Linearization; Power Amplifier; Injection; IMD; IM3 Cancellation; FPGA