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An Upgraded Dual-Band Digital Predistorter Model for Power Amplifiers Linearization
IEEE Microwave and Wireless Components Letters ( IF 3 ) Pub Date : 2021-01-01 , DOI: 10.1109/lmwc.2020.3040101
Abraham Perez-Hernandez , Juan A. Becerra , Maria Jose Madero-Ayora , Carlos Crespo-Cadenas

Digital predistortion (DPD) based on Volterra models is commonly employed to counteract the nonlinear distortion of power amplifiers. However, when concurrent dual-band signals are transmitted, 2-D DPD models are required. In this work, upgrading of a standard dual-band model is proposed and justified using multinomial theorem. The linearization performance of the current proposal has been compared to the unextended model. Fifth generation (5G) New Radio signals have been generated to compose a dual-band signal, which later was employed as input signal at Chalmers University of Technology’s RF WebLab. Using coefficient selection techniques, the most relevant regressors are shown, and the importance of the new extension is proven. Linearization results highlight the benefits of this proposal.

中文翻译:

一种用于功率放大器线性化的升级双频数字预失真器模型

基于 Volterra 模型的数字预失真 (DPD) 通常用于抵消功率放大器的非线性失真。但是,在传输并发双频信号时,需要二维 DPD 模型。在这项工作中,使用多项式定理提出并证明了标准双频带模型的升级。当前提议的线性化性能已与未扩展模型进行了比较。已生成第五代 (5G) 新无线电信号以组成双频段信号,该信号后来被查尔姆斯理工大学的 RF WebLab 用作输入信号。使用系数选择技术,显示了最相关的回归量,并证明了新扩展的重要性。线性化结果突出了该提议的好处。
更新日期:2021-01-01
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