芯片级原子钟辅助的惯性/卫星组合导航系统欺骗检测方法  

Chip-scale atomic clock aided INS/GNSS integrated navigation system spoofing detection method

作　　者：刘洋[1] 李四海[1] 付强文[1] 周琪[2] LIU Yang;LI Sihai;FU Qiangwen;ZHOU Qi(School of Automation,Northwestern Polytechnical University,Xi’an 710129,China;Flight Automatic Control Research Institute,Xi’an 710065,China)

机构地区：[1]西北工业大学自动化学院,西安710129 [2]西安飞行自动控制研究所,西安710065

出　　处：《中国惯性技术学报》2019年第5期654-660,共7页Journal of Chinese Inertial Technology

基　　金：航空科学基金（20165853041)

摘　　要：商业化芯片级原子钟产品的出现,使其在惯性/卫星组合导航系统中的应用成为可能。针对卫星导航欺骗信号检测,提出利用芯片级原子钟高精度时间保持能力,从时间维度进行欺骗检测的方法。首先,介绍了芯片级原子钟的基本特点和时间保持能力,然后通过分析欺骗干扰对接收机时间的影响,针对先压制后欺骗的典型模式,基于真实信号和欺骗信号下的钟差预测误差分布,构造了芯片级原子钟辅助的欺骗检测模型。实测数据表明,芯片级原子钟的钟差预测精度高出接收机内部时钟精度一个数量级以上。通过检测概率分析,证明了芯片级原子钟在卫星欺骗检测上的优异性能。The advent of commercial chip-level atomic clocks(CSAC)makes it possible to apply them in inertial/satellite integrated navigation systems.Aiming at the detection of satellite navigation spoofing signals,a time-dimension method for detecting spoofing attacks is proposed based on CSAC’s high-precision time retention ability.The basic characteristics and time retention ability of CSAC are introduced.By analyzing the influence of GNSS spoofing on receiver time and the error distribution of clock bias prediction under authentic and spoofed signals,a CSAC-assisted spoofing detection model is constructed to detect typical jam-and-spoof interference.The measured data shows that the clock bias prediction accuracy of CSAC is more than one order of magnitude higher than that of the internal clock of the ordinary receiver.The detection probability analysis proves the excellent performance of CSAC in GNSS spoofing detection.

关 键 词：芯片级原子钟 卫星导航 组合导航 欺骗检测 

分 类 号：U666.1[交通运输工程—船舶及航道工程]