GNSS欺骗干扰技术研究

欺骗干扰是目前卫星导航设备面临的重要威胁,在欺骗干扰条件下,目标接收机接收到的欺骗信号功率大于真实信号,产生错误的定位或授时结果。根据干扰产生方式的不同将欺骗干扰源分为基于信号模拟器的自主产生式、基于接收机的接收产生式、基于转发器的转发式3类,其中基于接收机的产生式是目前真正实现欺骗攻击的干扰源。由于欺骗干扰实现形式的复杂多样性,对欺骗干扰的实施阶段、信号特性的影响和定位授时结果的影响进行了分析。

An Overview to GNSS Spoofing Technologies

GNSS spoofing is an important threat to the current satellite navigation equipment. Under the condition of spoofing,the spoofing signal’s power that target receiver received is greater than the real signal,and positioning errors or timing error are induced. According to the different methods of signal generating,spoofing source is divided into three categories: spoofer based on GNSS signal simulator,spoofer based on GNSS receiver and spoofer based on signal transponder re-radiator. The spoofer based on GNSS receiver is truly realizes the spoofing attack to receiver. Due to the complexity of spoofer realization forms,the implementation stage,signal characteristics and the influence to positioning and timing results are analyzed.