A Digital Predistortion Method for Fast Frequency-Hopping Systems

被引：1
|
作者：
Pan, Wensheng [1 ]
Xie, Lanfeng [2 ]
Xia, Xiangjie [1 ]
Shi, Chengzhe [1 ]
Ye, Yufeng [3 ]
Cui, Peizhang [4 ]
Liu, Ying [1 ]
Tang, Youxi [1 ]
机构：
[1] Univ Elect Sci & Technol China, Natl Key Lab Sci & Technol Commun, Chengdu 611731, Peoples R China
[2] AVIC Chengdu Aircraft Design & Res Inst, Chengdu 610091, Peoples R China
[3] Univ Elect Sci & Technol China, Sch Aeronaut & Astronaut, Chengdu 611731, Peoples R China
[4] Army Engn Univ, Dept Elect & Opt Engn, Shijiazhuang 050003, Hebei, Peoples R China
来源：
2019 IEEE 19TH INTERNATIONAL SYMPOSIUM ON SIGNAL PROCESSING AND INFORMATION TECHNOLOGY (ISSPIT 2019) | 2019年
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Digital predistortion; frequency-hopping; non-linear distortion; power amplifiers;
D O I：
10.1109/isspit47144.2019.9001897
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
Digital predistortion (DPD) has been widely used to linearize the power amplifiers (PAs) by capturing the PA nonlinear distortion and pre-distorting the PA input. However, both the capturing and the signal processing procedures are time consuming and not applicable to fast frequency-hopping systems. This paper explores the feasibility of constructing a wideband signal to extract DPD coefficients for frequency-hopping systems. The frequency range of the wideband signal is designed to cover all hopping frequencies, as such the nonlinear characteristics of the PA at all hopping frequencies are included during the estimation of the DPD coefficients. Thus, only one set of coefficients is needed to linearize the PA over a wide frequency range. Experiment is performed on a self-designed testbed, which demonstrates that the proposed method can be used to effectively linearize the narrowband signals over different carrier frequencies.
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收藏
页数：3
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