接收机空时处理对导航信号相位延时的影响  

The Influence of Receiver Space-Time Processing on Navigation Signal Phase Delay

作　　者：陈琦[1] 贾学东[1] 陈国军[1] 何婷[1] CHEN Qi;JIA Xuedong;CHEN Guojun;HE Ting(Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《测绘科学技术学报》2020年第4期356-361,共6页Journal of Geomatics Science and Technology

基　　金：河南省重大科技专项项目(181200211300)。

摘　　要：接收机抗干扰研究一直是卫星导航领域的热点问题,空时联合是导航终端抗干扰常用的技术手段。针对阵列空时联合技术,先讨论了常用的Capon波束成型与功率倒置抗干扰处理方法,分析了两种算法对导航信号相位时延的影响。通过对空间阵型和空时处理算法的建模仿真,研究了引入空时约束零陷处理后系统的抗干扰性能,进一步分析了干扰信号的来向变化对有用信号相位延迟的影响。结果表明,零陷处理会改变有用信号的相位,加入信号来向约束,可补偿波束赋形后的相位延迟,且在干扰调零时产生最大的主瓣增益,使接收机抗干扰性能达到最优。The research of receiver anti-jamming has been a hot issue in the field of satellite navigation.Space-time joint anti-jamming is a common technical means in navigation terminal.For the array space-time joint technology,the common methods of Capon beamforming and power inversion anti-jamming are discussed firstly,and then the influence of the two algorithms on the phase delay of navigation signals is analyzed.Through modeling and simulation of space formation and space-time processing algorithm,the anti-jamming performance of the system with zero-notch space-time processing is studied,and the influence of the directional change of the interference signal on the phase delay of the navigation signal is further analyzed.The results show that nulling processing can change the phase of navigation signal,adding direction constraint for signals can compensate the phase delay after beamforming,and generate the maximum gain of the main lobe while nulling the interference,so as to achieve the optimal anti-jamming performance for navigation receiver.

关 键 词：阵列模型 空时联合处理 方向约束 压制式干扰 相位延迟 

分 类 号：P228[天文地球—大地测量学与测量工程]