针对GPS系统对时间的敏感性,提出了一种对GPS时间系统进行干扰的方法。此种方法采用转发式干扰的模式,模拟动态条件下多普勒频移对信号造成的码率偏移,对GPS信号的相关函数峰值做出连续的牵引。仿真表明:采用该方法能够对GPS信号进行有效干扰,且相对于传统的转发式干扰而言,在隐蔽性和相关峰可控性两个方面大大增强。

In the satellite navigation receiver, there is code frequency offset between the received and the local signals when the host vehicle is in high dynamic motion. This kind of code frequency offset which Doppler frequency caused influence the stability of GPS (global positioning system) time system. Based on the time sensitivity to the GPS signal, a method of GPS time system jamming was presented in this paper. This method adopted the model of repeater jamming, simulating the code frequency offset to influence the stability of GPS time system, causing the correlation peak of GPS signal continuous traction. Simulation results show that the method can impact on GPS jamming effectively, and compared with the traditional repeater jamming, the concealment and the controllability of correlation peak are both greatly enhanced.