摘要
针对复杂电磁环境中无人装备的卫星导航定位功能易受到电磁干扰影响的问题,提出带外电磁干扰的效应规律和带外双频干扰的预测模型。首先,从大信号阻塞干扰的机理出发,推导得到带外双频电磁干扰下导航接收机卫星跟踪丢失的预测模型。其次,开展单源电磁干扰的效应试验,得到不同卫星的电磁敏感阈值曲线,并对除主敏感频带外其他敏感频带的产生机理进行分析。最后,开展了双频电磁干扰的效应试验,通过试验数据验证了该模型的预测误差在±2 dB以内,为无人装备在带外电磁干扰预测方面提供了有效方法。
Aiming at the problem the satellite navigation’s positioning functions of unmanned equipment in complex electromagnetic environments are susceptible to electromagnetic interference(e MI),the effect of out-of-band e MI and the prediction model of out-of-band dual-frequency interference are proposed.Firstly,a prediction model of navigation receiver satellite tracking loss under dual-frequency e MI is derived,which is based on the mechanism of large-signal blocking interference.Secondly,through the single-source e MI effect experiment,the electromagnetic sensitivity threshold curve of different satellites was obtained,and the generation mechanism of other sensitive frequency bands except the main sensitive frequency band was analyzed.Finally,a dual-frequency e MI effect experiment was carried out,and the experimental data verified that the prediction error of the model was less than 2 dB,which provides a method for unmanned equipment to predict out-of-band e MI.
作者
张庆龙
王玉明
程二威
陈亚洲
马立云
ZHANG Qinglong;WANG Yuming;CHENG Erwei;CHEN Yazhou;MA Liyun(National Key Laboratory onElectromagnetice nvironment effects,Shijiazhuang Campus of Army Engineering University,Shijiazhuang 050003,China)
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2021年第9期2588-2593,共6页
Systems Engineering and Electronics
基金
十三五装备预研项目(41409010501)
国家部委科研资助项目(LJ20182A040327)资助课题。
关键词
卫星导航
带外双频
电磁敏感阈值
预测方法
satellite navigation
out-of-band dual-frequency
electromagnetic sensitivity threshold
prediction method