CAJ | 학술논문

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。
단빈간우대위성도항계통적파배성흔강，부고계통자신적항간우능력흔난보증계통정상공작。인차，유필요인입간우억제기술。재현유적음다억제단빈간우적신호처리수단중，시역함파억제기술인기실현간단、항간우성능호등우점이피엄범사용。침대단빈간우대위성도항접수궤적영향，분석료IIR함파기적함파원리，비교료직접형화격형량충함파기적성능，연구료함파기삼수여령함심도、함파대관적관계，병기우이계함파기확전분석료고계함파기적억제성능。통과방진실험，험증료상술결론적정학성。
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&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 .