摘要
针对无人机在卫星导航拒止环境下利用真实卫星信号导航定位的需求,提出一种基于调零天线的无人机抗导航干扰方法。首先,分析卫星导航压制和欺骗干扰的特点;其次,建立抗干扰模型,抗压制干扰的方法是使用调零天线零陷信号功率,抗欺骗干扰的方法是通过无人机特定的运动,计算位移得到的多普勒和载波跟踪环得到的多普勒之差,并与无人机运动变化进行对比,选定门限判定每颗卫星信号是否为欺骗干扰信号,标记并去除欺骗干扰信号;最后,在欺骗干扰信号和真实信号同时存在的情况下,利用基于Matlab的GPS软件接收机,半物理仿真验证欺骗干扰和抗欺骗干扰的效果,该方法达到了在压制干扰和欺骗干扰环境中利用真实卫星信号定位的目的,可应用于民用和军用卫星导航压制和欺骗干扰中。
To meet the requirement of navigation and positioning of real satellite signals in the environment of satellite navigation rejection,a UAV anti-navigation jamming method based on nulling antenna is given in this paper. The characteristics of suppression and deceptive jamming influence in satellite navigation are analyzed. The anti-jamming model is established. The anti-suppression jamming method is to utilize the ability of nulling antenna to suppress jamming. The anti-deceptive jamming is to calculate the Doppler difference obtained by the displacement and carrier tracking ring by the specific motion of the unmanned aerial vehicle,and to compare with the motion change of the unmanned aerial vehicle. The threshold is selected to determine whether each satellite signal is a deception signal,so as to mark and remove the deceptive jamming signal. In the presence of deceptive jamming signal and real signal,GPS software receiver based on Matlab is utilized to perform semi-physical simulation to verify the effect of deceptive jamming and anti-deceptive jamming. This method can achieve the purpose of using real satellite signal positioning in suppressing jamming and deceptive jamming environment,and can be applied to civil and military satellite navigation suppression and deceptive jamming.
作者
李津
李鹏程
刘博
何中翔
LI Jin;LI Pengcheng;LIU Bo;HE Zhongxiang(Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China)
出处
《现代电子技术》
2023年第5期25-28,共4页
Modern Electronics Technique
关键词
全球定位系统
抗导航干扰
无人机
多普勒变化
调零天线
导航拒止环境
global positioning system
anti-navigation jamming
UAV
doppler shift
nulling antenna
navigation reject environment
