摘要
针对卫星接收机可能遭受转发式欺骗干扰而造成缓变型时间同步攻击的情形,提出了基于三步迭代滤波器的攻击防护方案.该方案首先引入缓变型时间同步攻击模型和缓变型时间同步攻击感知模型,并利用三步迭代滤波器估计缓变型时间同步攻击感知模型的时钟偏差与时钟漂移,最后依据构建的纠偏模型对钟差与钟漂进行校正.仿真实验结果表明,该方案能在1 s内及时检测出缓变型时间同步攻击,并进行有效抑制,有效降低时间同步攻击对授时精度的影响.
For the case where the satellite receiver may suffer from a slowly-varying time synchronization attack caused by forwarding spoofing,a protective scheme based on three-step iterative filter is proposed and demonstrated.In this scheme,a slow time synchronization attack model and a slow time synchronization attack awareness model are introduced,and then the clock bias and drift of the slow time synchronization attack awareness model are estimated by using three-step iterative filter,and finally the estimated clock bias and drift are corrected via the correction model.Simulation results show that the proposed scheme can detect the slowly-varying time synchronization attack in time within 1s and effectively suppress it,and reduce the influence of time synchronization attack on timing accuracy.
作者
刘钰沐
张林秀
黄建刚
罗正华
李城鑫
LIU Yumu;ZHANG Linxiu;HUANG Jiangang;LUO Zhenghua;LI Chengxin(Fifth Institute of Telecommunication Science and Technology,Chengdu 610062,China;Sichuan Time Frequency Synchronization System and Application Engineering Technology Research Center,Chengdu 610062,China;School of Electronic Information and Electrical Engineering,Chengdu University,Chengdu 610106,China)
出处
《成都大学学报（自然科学版）》
2024年第2期160-165,共6页
Journal of Chengdu University（Natural Science Edition）
基金
四川省科技计划项目(2021YFG0361、2023YFS0426)。
关键词
三步迭代滤波器
缓变型
时间同步攻击
卫星授时
three-step iterative filter
slowly-varying
time synchronization attack
satellite timing
