Analysis of third-order intermodulation blocking effect for satellite navigation receiver

被引：0
|
作者：
Zhao H. [1 ]
Wei G. [1 ]
Du X. [1 ]
Zheng J. [1 ]
Li M. [1 ]
机构：
[1] National Key Laboratory on Electromagnetic Environment Effects, Army Engineering University Shijiazhuang Campus, Shijiazhuang
来源：
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | 2022年 / 44卷 / 04期
关键词：
Blocking effect; Electromagnetic radiation; Navigation receiver; Single frequency continuous wave; Third-order intermodulation;
D O I：
10.12305/j.issn.1001-506X.2022.04.32
中图分类号：
学科分类号：
摘要：
In order to master the interference rule of satellite navigation receiver under electromagnetic radiation, a navigation receiver is taken as the experimental object, the full level irradiation method is used to carry out the electromagnetic radiation test of the single frequency continuous wave and the third-order intermodulation blocking effect test of the out-of-band dual-band electromagnetic radiation, the accuracy of the blocking effect model of third-order intermodulation is verified by experiments. The results show that the tested navigation receiver operating frequency in the range of -4~18 MHz offset is more sensitive to single-frequency electromagnetic radiation. The ability to resist electromagnetic interference in negative frequency offset is much greater than that in positive frequency offset. The field intensity of the third-order intermodulation on the dual-band is significantly lower than the single frequency blocking interference field at the same frequency point, and the maximum difference is up to 46 dB. The ratio of the peak value of the third-order intermodulation blocking interference factor at the negative frequency deviation end to the peak value of the positive frequency deviation end is up to more than 20 times, and the sensitive frequency deviation range is more than twice the width of that of the positive frequency deviation end. © 2022, Editorial Office of Systems Engineering and Electronics. All right reserved.
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页码：1336 / 1342
页数：6
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