随着卫星导航定位系统的不断延伸与发展，导航定位技术已经成为军事和民用中一个不可分割的辅助功能，并发挥着极其重要的作用。与此同时，随着导航定位在军事上的深入应用，“导航干扰战”已经成为电子对抗的重要分支。在民用方向，导航定位干扰系统的研制对保密单位避免泄密、驱逐无人机和导航信号接收机的性能测试等均有良好的发展前景。

本文在分析了国内外导航定位及干扰技术的研究现状之后，发现仅仅针对卫星导航信号干扰在某些设备上无法对其定位进行欺骗或者屏蔽。在总结前人工作的基础之上本文创新性地提出了对卫星导航信号和辅助定位两种定位方式结合进行干扰的方案策略，并针对欺骗式干扰和压制式干扰进行了深入的研究，详细工作包括：

（1）搭建了GPS欺骗式干扰系统。本文首先简要介绍了目前存在的四大卫星导航定位系统，而后详细对GPS信号的组成和产生方式进行了研究，并结合卫星导航定位原理设计搭建了GPS生成式欺骗干扰平台。GPS生成式欺骗干扰平台包括静态定位欺骗干扰、结合地图获取经纬度的动态欺骗和实时动态欺骗干扰，并在实时动态欺骗干扰的基础上完成了对终端导航信号接收机模拟步行速度和汽车行驶速度的伪信号欺骗测试。除此之外，转发式欺骗干扰平台参考数字射频存储技术进行设计搭建并实现了对信号的接收与转发功能。

（2）搭建了辅助定位干扰系统。本文先后对基站、Wi-Fi和蓝牙三种辅助定位方式的定位原理进行了介绍，并针对辅助定位原理搭建了相应的干扰平台。伪基站干扰平台基于BladeRF硬件实现了对周围基站的探测功能并真正搭建了一个小型基站，该小型基站可以实现对基站身份信息的自由设置并完成了基站下的短信和通话功能测试；Wi-Fi定位干扰平台可以对网络连接进行攻击并模拟大量伪Wi-Fi信号；蓝牙定位干扰平台利用树莓派完成了对普通蓝牙和iBeacon定位设备的伪造克隆。辅助定位干扰系统是卫星导航信号干扰系统中必不可少的一环，同时针对卫星信号和辅助定位攻击可以提高整体系统的干扰成功率。

（3）搭建了压制式干扰系统。压制式干扰系统包括信号电平检测、全频段压制式干扰、频谱分析和针对式压制干扰四种平台。信号电平检测平台可以快速完成对频段内某一频点某一距离信号强度的侦测功能；全频段压制式干扰平台可以快速高效地阻塞目标频段通信；频谱分析平台在USRP X310硬件的基础上实现200MS/s高采样率的信号探测；针对式压制干扰平台通过分析接收信号的通信频点，发射针对性梳状带压制干扰信号从而节省了功率损耗。

经测试本文所搭建的卫星导航信号干扰系统能够有效地完成对卫星信号和辅助定位的干扰工作。在现在反干扰手段逐步升级的情况下，单一的干扰方式可能不能完全阻碍导航定位的生效，本文所采用的欺骗式干扰和压制式干扰两种组合攻击方式为系统的成功干扰奠定了基础，并且该系统曾受陕西省公安厅邀请圆满完成清明公祭轩辕黄帝典礼和首届中国农民丰收节的安保任务。

With the continuous development of satellite navigation and positioning systems, navigation and positioning technology has become an indispensable auxiliary function in military and civilian use and plays an extremely important role. At the same time, with the in-depth application of navigation positioning in the military, the "navigation jamming war" has become an important branch of electronic countermeasures. In the civilian application, the development of navigation and positioning jamming systems has good  prospects for  avoiding leaks, expelling drones, and testing performance of navigation signal receivers.

After analyzing the current research status of satellite navigation and positioning jamming technology in China and abroad, this paper found that only the interference of satellite navigation and positioning signals on some devices cannot completely shield them from acquiring positioning information or deceive its positioning. On the basis of summing up previous work, this paper innovatively proposes a scheme to interfere the combination of satellite navigation signals and assisted positioning. This paper also conducted in-depth research on deceptive and repressive interference. The detailed work includes:

Build a GPS deception jamming system. This paper first briefly introduced the four existing satellite navigation and positioning systems, and then explained the composition and generation of GPS signals in detail, and built a GPS generative deception jamming platform based on the GPS positioning principle. The GPS generative deception jamming platform includes static positioning deception jamming, combined with maps to obtain latitude and longitude dynamic deception, and real-time dynamic deception jamming. Based on the real-time dynamic deception, the terminal navigation signal receiver simulated walking speed and car driving speed pseudo signals deception test. In addition, the forward deception jamming platform is built with DRFM technology and realizes the function of receiving and transmitting signals

Build a assisting positioning interference system. This article has introduced the positioning principles of the three auxiliary positioning methods of the base station, Wi-Fi and Bluetooth, and established corresponding interference platforms based on the auxiliary positioning principles. The pseudo base station interference platform was based on BladeRF hardware to implement the detection function of the surrounding base stations and truly built a small base station. The small base station can freely set the identity information of the base station and complete the short message and call function tests ; Wi-Fi The interference platform can attack network connections and simulate a large number of fake Wi-Fi signals; the Bluetooth interference platform uses the Raspberry Pi to complete fake clones of ordinary Bluetooth and iBeacon positioning devices. The assisted positioning interference system is an indispensable part of the satellite navigation positioning interference system. At the same time, targeting satellite signals and assisted positioning attacks can improve the overall system's interference success rate.

Build a suppression jamming system. The suppression interference platform includes four platforms: signal level detection, full-band suppression interference, spectrum analysis, and targeted suppression interference. The signal level detection platform can quickly complete the signal strength detection function at a certain distance and a certain frequency point in the frequency band; the full-band suppression interference platform can quickly and efficiently block the communication of the target frequency band; the spectrum analysis platform achieves a high sampling rate of 200MS / s based on the USRP X310 platform Signal observation; targeted suppression interference platform By analyzing the communication frequency of the received signal, a targeted comb suppression interference signal is transmitted to save power loss.

The satellite navigation positioning interference system can effectively complete the interference to satellite signals and assist positioning. With the gradual escalation of anti-jamming methods, a single jamming method may not completely prevent the effectiveness of navigation and positioning. This paper uses two types of combined attack methods, suppression jamming and deception jamming, to lay the foundation for the system's success rate of jamming.In addition, the system was invited by Shaanxi Provincial Public Security Department to protect the ceremony of Xuanyuan Yellow Emperor's sacrifice in Qingming Dynasty and the first Chinese farmers harvest festival successfully.