卫星导航接收机基于IIR陷波器的单频干扰抑制性能分析  

Performance Analysis of CW Interference Suppression for Satellite Navigation Receivers Using IIR Notch Filter

作　　者：贺红兵[1] 聂俊伟[1] 徐博[1] 欧钢[1] 

机构地区：[1]国防科技大学电子科学与工程学院卫星导航定位技术工程研究中心,湖南长沙410073

出　　处：《全球定位系统》2014年第5期13-18,25,共7页Gnss World of China

摘　　要：单频干扰对卫星导航系统的破坏性很强,仅靠系统自身的抗干扰能力很难保证系统正常工作。因此,有必要引入干扰抑制技术。在现有的众多抑制单频干扰的信号处理手段中,时域陷波抑制技术因其实现简单、抗干扰性能好等优点而被广泛使用。针对单频干扰对卫星导航接收机的影响,分析了IIR陷波器的陷波原理,比较了直接型和格型两种陷波器的性能,研究了陷波器参数与零陷深度、陷波带宽的关系,并基于二阶陷波器扩展分析了高阶陷波器的抑制性能。通过仿真实验,验证了上述结论的正确性。Due to the destructive of CW interference on the satellite navigation system ,it is difficult to guarantee the normal work of the system ,only depending on the anti-interfer-ence ability of the system itself .So it is necessary to introduce the interference suppression technology .In the numerous existing signal processing methods of CW interference suppres-sion ,time-domain notch suppression technology is widely used as its advantages of simple implementation and good anti-jamming performance .Based on the influence of CW interfer-ence for satellite navigation receivers ,this paper analyzes the principle of IIR notch filter firstly ,compares the performance of two major structural forms ,direct form and lattice . And the relationship between the notch filter parameters and zero in depth＆amp;notch bandwidth is studied ,then the rejection performance of the high-order notch filter is analyzed according to the second-order notch filter .In the end ,the conclusion above is tested and verified by simulation .

关 键 词：卫星导航接收机 单频干扰 IIR陷波器 

分 类 号：P228.4[天文地球—大地测量学与测量工程]