导航接收机跟踪环路电磁干扰的预测方法研究

张庆龙; 王玉明; 程二威; 陈亚洲; 马立云; 张喆

doi:10.11999/JEIT200895

导航接收机跟踪环路电磁干扰的预测方法研究

doi: 10.11999/JEIT200895

张庆龙^{1, 2},
王玉明¹,
程二威¹,
陈亚洲^1, ,,
马立云¹,
张喆²

1.
陆军工程大学石家庄校区电磁环境效应国防重点试验室石家庄 050003
2.
海军航空大学第二飞行训练基地长治 046000

详细信息

作者简介:
张庆龙：男，1987年生，博士生，研究方向为电磁环境效应与防护

王玉明：女，1980年生，讲师，研究方向为电磁兼容与电磁防护

程二威：男，1983年生，副教授，研究方向为电磁环境模拟与测试技术

陈亚洲：男，1975年生，教授，研究方向为强电磁环境模拟/电磁环境效应与防护

马立云：女，1984年生，讲师，研究方向为电磁兼容与电磁防护

张喆：男，1988年生，助理工程师，研究方向为电子通信

通讯作者:
陈亚洲　chen_yazhou@sina.com

中图分类号: TN97
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- 被引次数: 0
出版历程
- 收稿日期: 2020-10-19
- 修回日期: 2021-03-15
- 网络出版日期: 2021-03-29
- 刊出日期: 2021-12-21

Investigation on Prediction Method of Electromagnetic Interference in the Tracking Loop of Navigation Receiver

1.
National Key Laboratory of Electromagnetic Environment Effects, Army Engineering University Shijiazhuang Campus, Shijiazhuang 050003, China
2.
The Second Flight Training Base, Naval Aeronautical University, Changzhi 046000, China

摘要

摘要: 针对复杂战场电磁环境下，导航接收机因电磁干扰而引起内部卫星跟踪丢失的现象，该文研究了导航接收机跟踪环路在面临带内和带外双频干扰时的效应预测模型。通过对接收机射频前端的阻塞机理分析，以矢量分析的方法推导了射频前端信号的增益公式，并结合接收机跟踪环路相关处理的过程，得到了带外和带内双频干扰下的效应预测模型。之后以载噪比门限值为失锁判据，开展了双频干扰效应试验，试验结果表明上述模型能够对接收机内部卫星跟踪的状态进行预测，预测误差小于±1 dB，且对于窄带和宽带干扰信号同样适用。
- 卫星导航接收机 /
- 带外和带内双频 /
- 预测模型 /
- 载噪比门限值
Abstract: In view of the phenomenon that the navigation receiver loses tracking of the satellites due to ElectroMagnetic Interference (EMI) in the complex battlefield electromagnetic environment, the effect prediction model of the navigation receiver’ tracking loop, when facing in-band and out-of-band dual-frequency interference is studied. Through the analysis of the blocking mechanism of the receiver’s RF (Radio Frequency) front-end, the gain formula of the RF front-end signal is deduced by the method of vector analysis, and combined with the relevant processing of the receiver, the effect prediction model under out-of-band and in-band dual-frequency interference is obtained. Then, by using the Carrier-to-Noise ratio (C/N₀) threshold as the criterion for loss of lock, a dual-frequency interference effect experiment is carried out. The experiment results show that the above model can predict the state of satellite tracking inside the receiver, whose prediction error is less than ±1 dB, and it is equally applicable to narrowband and wideband interference signals.
- Satellite navigation receiver /
- In-band and out-of-band dual-frequency /
- Effect prediction model /
- Carrier-to-Noise ratio (C/N₀) threshold

HTML全文

图 1 带外单频干扰的矢量图

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图 2 带内和带外同时干扰的矢量图

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图 3 试验配置框图

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图 4 8号卫星的单频敏感阈值

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表 1 第1组双频干扰试验数据

指标	f₁	f₂	R_f	误差(dB)
单频干扰功率阈值(dBm)	–0.76	–85.12	—	—
双频干扰功率阈值(dBm)	–6.99	–86.33	1.089264	0.742663
	–5.96	–87.12	1.050728	0.429806
	–4.96	–87.53	1.072632	0.609015
	–3.96	–88.51	1.055746	0.471189
	–2.98	–89.11	1.091419	0.759830
	–1.97	–92.52	1.014505	0.125084

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表 2 第2组双频干扰试验数据

指标	f₃	f₄	R_f	误差(dB)
单频干扰功率阈值(dBm)	–1.54	–86.2	—	—
双频干扰功率阈值(dBm)	–2.96	–93.2	1.048707	0.413083
	–3.94	–91.4	1.060573	0.510811
	–4.98	–90.6	1.036055	0.307656
	–5.94	–89.4	1.081190	0.678040
	–6.96	–88.8	1.085338	0.711300
	–8.94	–88.2	1.057537	0.485911

下载: 导出CSV

表 3 第3组双频干扰试验数据

指标	f₅	f₆	R_f	误差(dB)
单频干扰功率阈值(dBm)	–1.2	–84.4	—	—
双频干扰功率阈值(dBm)	–2.05	–92.4	1.065265	0.549153
	–3.04	–89.6	1.111091	0.914993
	–4.03	–88.4	1.120045	0.984709
	–5.05	–87.6	1.120578	0.988842
	–6.05	–87	1.121678	0.997364
	–8.05	–86.4	1.085422	0.711972

下载: 导出CSV

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