导航接收机噪声电磁辐射阻塞效应分析

doi:10.12305/j.issn.1001-506X.2022.10.27

系统工程与电子技术 ›› 2022, Vol. 44 ›› Issue (10): 3221-3227.doi: 10.12305/j.issn.1001-506X.2022.10.27

导航接收机噪声电磁辐射阻塞效应分析

李媚^1,², 魏光辉^1,*, 赵宏泽¹, 郑建拥¹, 杜雪¹

1. 陆军工程大学石家庄校区电磁环境效应国家重点实验室, 河北石家庄 050003
2. 河北科技大学信息科学与工程学院, 河北石家庄 050018

收稿日期:2021-06-07 出版日期:2022-09-20 发布日期:2022-10-24
通讯作者: 魏光辉
作者简介:李媚 (1980—), 女, 副教授, 博士研究生, 主要研究方向为电磁环境效应试验评估技术|魏光辉 (1964—), 男, 教授, 博士研究生导师, 硕士, 主要研究方向为电磁兼容与防护技术、电磁环境效应试验评估技术|赵宏泽 (1998—), 男, 博士研究生, 主要研究方向为电磁环境效应试验评估技术|郑建拥 (1994—), 男, 博士研究生, 主要研究方向为电磁环境效应试验评估技术|杜雪 (1991—), 女, 博士研究生, 主要研究方向为电磁环境效应试验评估技术
基金资助:
国防基础科研重点项目(41409030301)

Analysis of blocking effects of electromagnetic radiation noise on navigation receiver

Mei LI^1,², Guanghui WEI^1,*, Hongze ZHAO¹, Jianyong ZHENG¹, Xue DU¹

1. National Key Laboratory on Electromagnetic Environment Effects, Army Engineering University Shijiazhuang Campus, Shijiazhuang 050003, China
2. School of Information Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China

Received:2021-06-07 Online:2022-09-20 Published:2022-10-24
Contact: Guanghui WEI

摘要/Abstract

摘要：

针对电磁辐射导致卫星导航系统定位丢失的现象, 通过干扰机理分析建立了噪声电磁辐射阻塞效应评估模型, 对导航接收机进行了效应试验与分析评估。为了解决由于工作信号较弱, 在待评估环境下导航接收机的敏感度数据不易准确测量的问题, 采用工作频点和带外敏感度相对平稳频点对敏感度数据进行了两点校准。校准后在随机噪声及单频复合噪声临界干扰下的效应指数均大于1, 最大误差为1.8 dB, 符合效应评估模型理论分析, 与试验现象一致。结果表明, 提出的噪声电磁辐射效应评估模型可同时用于装备带内和带外噪声干扰效应评估, 而两点校准方法对提高弱工作信号下的受试装备效应评估准确度意义重大。

关键词: 导航接收机, 电磁辐射, 噪声干扰, 校准, 效应评估

Abstract:

Aiming at the phenomenon that the satellite navigation system loses its positioning caused by electromagnetic radiation, an effect evaluation model of electromagnetic radiation noise based on interference mechanism analysis is established. The effect experiment and the analytical evaluation on the navigation receiver are performed. In order to solve the problem that the sensitivity data of the navigation receiver is difficult to be accurately measured due to weak working signals in the environment to be evaluated, two-point calibration is carried out on sensitivity data by using the working frequency point and a relatively stable frequency point of out-of-band. The effects index of both random noise and single-frequency compound noise is greater than 1 after calibration. The maximum error is 1. 8 dB, which is conformed to the theoretical analysis of the effects evaluation model and is consistent with the experimental phenomenon. The results show that the proposed effect evaluation model of electromagnetic radiation noise can be used for in-band and out-of-band noise interference effects evaluation simultaneously, while the proposed two-point calibration method is of great significance to improve the effects evaluation accuracy of tested equipment with weak working signals.

Key words: navigation receiver, electromagnetic radiation, noise interference, calibration, effects evaluation

中图分类号:

TM937

李媚, 魏光辉, 赵宏泽, 郑建拥, 杜雪. 导航接收机噪声电磁辐射阻塞效应分析[J]. 系统工程与电子技术, 2022, 44(10): 3221-3227.

Mei LI, Guanghui WEI, Hongze ZHAO, Jianyong ZHENG, Xue DU. Analysis of blocking effects of electromagnetic radiation noise on navigation receiver[J]. Systems Engineering and Electronics, 2022, 44(10): 3221-3227.

图/表 7

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噪声类型	校准点单频阻塞功率/ dBm	复合信号单频临界干扰功率/dBm	效应指数R_I	相对误差/dB
随机噪声	P_s0=-71 P_s1=-56.5	—	1.4	1.5
随机噪声	P_s0=-71 P_s1=-56.5	—	1.4	1.5
单频复合噪声	P_s0=-66 P_s1=-52	P_n0=-66.1	1.5	1.8
单频复合噪声	P_s0=-66 P_s1=-52	P_n1=-53.5	1.2	0.8

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导航接收机噪声电磁辐射阻塞效应分析

Analysis of blocking effects of electromagnetic radiation noise on navigation receiver

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