卫星导航系统安全防护研究

Research on GNSS’s security-protection

卫星导航系统安全防护对导航以及武器装备具有极其重要的意义。首先介绍了卫星导航系统安全防护的定义、描述和研究内容;然后根据系统工程思想,给出了研究卫星导航系统安全防护问题的一般思路;接着给出了一个综合考虑干扰策略、攻击水平、防护水平、作战场景等安全防护因素的数学模型;最后通过算例分析了接收机的安全防护。实验结论显示,相对于敌方攻击水平的防护水平是影响我方作战效用的关键因素,不同作战任务场景对安全防护的要求是不同的,攻击策略对作战效能的影响取决于相应防护水平的强弱。

Security-Protection of global navigation satellite systems plays an important role in naviga- tion systems and materiel. Firstly, its definition, description and study contents were introduced. Secondly, according to the view of system engineering, the process of security-protection was indicated, followed by a mathematical model which consists of interference strategy, attack level, the level of protection and combat scenario. Finally, an example was used to analyze the GNSS receivers security-protection. The results first indicate that： 1） the protection level relative to the level of enemy attacks is a key factor affecting the operational utility; 2） different combat scenarios have different needs for the level of protection, and 3） the effect of enemy interference policy on our operational utility depends on the corresponding level of protection.