无人机卫星导航系统的电磁干扰效应规律研究

doi:10.3969/j.issn.1001-506X.2020.12.03

Abstract

Abstract:

Aiming at the problem that the satellite navigation system of the unmanned aerial vehicle (UAV) is vulnerable to electromagnetic interference during the flight, the injection experiment of the continuous wave (CW) interference is carried out with the navigation receiver of a certain UAV type. Through the experiments, the in-band electromagnetic sensitivity curves of the different types of satellites are obtained, and the relationship between the initial carrier-to-noise ratio with the electromagnetic sensitivity threshold and interference signal ratio (ISR) is studied. Then, the sensitive frequency band of the navigation receiver is obtained, when positioning fails. Through the qualitative experiment analysis, the main reasons for the navigation receiver's positioning failure is the co-channel interference and the mixer sub channel interference. According to the above conclusion, a feasibility method for electromagnetic interference prediction of UAV satellite navigation system is given, which is of great significance for improving the safety situation of UAV in complex electromagnetic environment.

Key words: unmanned aerial vehicle (UAV), satellite navigation, sensitivity threshold, mixer, prediction method

CLC Number:

TM15

Qinglong ZHANG, Erwei CHENG, Yuming WANG, Yazhou CHEN, Liyun MA. Research on the electromagnetic interference effect of UAV satellite navigation system[J]. Systems Engineering and Electronics, 2020, 42(12): 2684-2691.

Figures/Tables 11

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Research on the electromagnetic interference effect of UAV satellite navigation system

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