GNSS授时干扰技术发展综述

Overview of the development of GNSS timing interference technology

随着全球卫星导航系统(GNSS)的发展,其授时功能已广泛应用于电力、通信等国家关键基础设施与国防领域。但由于卫星导航信号固有的脆弱性,授时服务极易受到恶意干扰,卫星授时安全日益受到世界关注。目前现行技术大都以干扰导航定位目的为主,对授时的干扰往往容易被忽略,实际上对授时结果的干扰对目标的危害性更大且极为隐蔽。首先,从授时基本干扰方式、授时干扰技术和授时干扰效果评估技术3个方面梳理了GNSS有意授时干扰关键技术的研究现状。其次,分析了GNSS授时干扰技术目前存在的科学问题。最后,对相关技术未来的发展趋势进行了展望。

With the development of the global navigation satellite system(GNSS),its timing function has been widely used in critical national infrastructures such as power and communications,as well as in the field of national defence.However,due to the inherent vulnerability of satellite navigation signals,the timing service is easily affected by malicious interference,and the security of satellite timing has increasingly attracted global attention.At present,most of the existing technologies mainly focus on the interference with the purpose of navigation and positioning,while the interference with the timing is often ignored,in fact,the interference with the timing results can be more harmful and extremely covert to the target.Firstly,the research status of key GNSS timing interference technologies is sorted out from three aspects,which are basic jamming mode,timing interference technology and timing interference effect evaluation technology.Secondly,the current scientific problems of GNSS intentional timing interference technology are also analyzed.Finally,the future development trend of related technologies is predicted.