一种基于多天线测向的欺骗干扰抑制方法  

A Method of Suppressing Spoofing Based on DOA

作　　者：范广伟[1] 王永杰 王飞 FAN Guang-wei;WANG Yong-jie;WANG Fei(The 54th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang Hebei 050081,China;Unit 93507 of PLA,Shijiazhuang Hebei 050081,China)

机构地区：[1]中国电子科技集团公司第54研究所,河北石家庄050081 [2]中国人民解放军93507部队,河北石家庄050081

出　　处：《计算机仿真》2023年第9期158-161,175,共5页Computer Simulation

摘　　要：卫星导航定位在人们日常生活中的应用日益广泛,但是,由于导航民码信号公开且到达地面的信号功率较低,导致在接收端很容易被欺骗或干扰,从而影响接收机的位置、速度或时间解算。针对传统的欺骗干扰检测与抑制方式仅是检测到欺骗后将被欺骗的卫星剔除可能会导致参与定位卫星数量不足的问题,提出了利用多天线进行欺骗干扰解扩后测向,再根据测向结果生成相应的抑制权值抑制欺骗干扰,解决了欺骗干扰的检测与抑制并行的问题。仿真结果表明,上述方法能够通过欺骗干扰波达方向来形成欺骗干扰抑制零陷,在剔除欺骗干扰的同时,导航信号的功率损耗优于1dB,可有效提升卫星导航接收终端的鲁棒性和可靠性。Satellite navigation and positioning is widely used in people's daily life.However,due to the public navigation civil code signal and the low signal power reaching the ground,it is easy to be spoofed or interfered with at the receiver,which affects the position,speed or time solution of the receiver.In view of the problem that the traditional spoofing detection and suppression method is only to remove the deceived satellites after detecting spoofing,which may lead to the insufficient number of positioning satellites,this paper proposes to use multiple antennas for direction finding after spoofing despreading,and then generate corresponding suppression weights according to the direction finding results to suppress spoofing,which solves the problem of parallel detection and suppression of spoofing.Simulation results show that this method can form a spoofing suppression null by spoofing the arrival direction.While eliminating spoofing,the power loss of the navigation signal is better than 1dB,which can effectively improve the robustness and reliability of the satellite navigation receiving terminal.

关 键 词：欺骗干扰 特征分解 测向 抑制 卫星导航 

分 类 号：P227[天文地球—大地测量学与测量工程]