Anti sweep jamming method of hybrid modulation fuze based on harmonic coefficient amplitude averaging

被引：0
|
作者：
Chen Q. [1 ]
Hao X. [1 ]
Yan X. [1 ]
Qiao C. [1 ]
Wang X. [1 ]
机构：
[1] School of Mechatronical Engineering, Beijing Institute of Technology, Beijing
来源：
Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics | 2020年 / 46卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Anti jamming method; Harmonic coefficient; Hybrid modulation; Radio fuze; Statistical characteristics;
D O I：
10.13700/j.bh.1001-5965.2019.0451
中图分类号：
学科分类号：
摘要：
To improve the anti sweep jamming performance of the Chaotic Codes Phase Modulation and Linear Frequency Modulation (CCPM-LFM) hybrid modulation radio fuze, the response of the CCPM-LFM fuze under sweep jamming was analysed, and an anti jamming method based on harmonic coefficient amplitude average was proposed. This method was based on the ranging principle of Instantaneous Correlation Harmonic Demodulation (ICHD), and the harmonic envelope extraction was realized by Fast Fourier Transform (FFT) algorithm. By averaging the harmonic coefficient amplitudes obtained from multiple times of FFT, this method took the advantage of the random and statistical characteristics of the chaotic codes, and the jamming was effectively suppressed. Theoretical and simulation results show that the method can effectively suppress the sweep jamming without affecting the ranging resolution of the fuze. © 2020, Editorial Board of JBUAA. All right reserved.
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页码：1317 / 1324
页数：7
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