进近阶段卫星导航信号抗干扰方法设计与仿真  

Design and Simulation of Satellite Navigation Signal Anti-interference Method in Approach Process

作　　者：程擎[1] 陈翰林 鲁合德 CHENG Qing;CHEN Han-lin;LU He-de(Civil Aviation Flight University of China,Guanghan Sichuan 618300,China)

机构地区：[1]中国民用航空飞行学院,四川广汉618300

出　　处：《计算机仿真》2024年第12期23-26,228,共5页Computer Simulation

基　　金：民航飞行技术与飞行安全重点实验室开放项目资助(FZ2021KF07);中国民用航空飞行学院研究生科研创新计划项目(X2023-39)。

摘　　要：航空器在进近阶段时的导航信号受到干扰,其在机载设备、管制终端上的位置将出现偏移、断裂,航空器的实际位置将无法得到确定,危及飞行安全。针对上述问题,提出基于信号区分提取的阵列导航抗干扰方法。通过对阵列天线接收信号进行Toeplitz特征重构,使得导航信号能够正确地被估计;利用不同信号来向的特点,人为设置取舍阈值,对导航信号到达角估计值完成峰值提取;得到期望信号导向矢量后,基于LCMV准则形成波束,完成干扰抑制。结合航空器进近过程进行应用仿真,结果表明,上述方法能够准确地区分导航、干扰信号,并抑制干扰信号,满足接收机的抗干扰性能要求。When the navigation signal of an aircraft in the approach stage is interfered with,its real position on airborne equipment and the control terminal will be offset and broken,which will make the aircraft's real position uncertain and endanger the safety of flight.To solve this problem,this paper proposes an array navigation anti-interference method based on signal discrimination extraction.By reconstructing the Toeplitz feature of the received signal of the array antenna,the direction of navigation signal arrival can be correctly estimated.Utilizing the characteristics of different signal directions,the trade-off threshold is artificially set to complete the peak extraction of the navigation signal.After obtaining the desired signal guidance vector,a beam is formed based on the LCMV criterion to complete interference suppression.Combined with the application simulation of the aircraft approach process,the results show that the method can accurately distinguish between navigation and interference signals,effectively suppressing interference signals and meeting the interference resistance performance requirements of the receiver.

关 键 词：航空器进近过程 卫星导航 特征重构 信号区分提取 波束形成 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计]