基于平均可工作概率的星间链路整网抗干扰性能评估方法

导航战条件下的全系统自主导航运行是卫星导航系统星间链路建设的重要目标之一。对星间链路在导航战情况下的工作性能进行准确评估具有非常重要的意义。星间链路的整网抗干扰性能与单星抗干扰能力、星间信号体制、建链策略、网络体制等多种因素均有关系,比较复杂,从而为其准确评估带来很大困难。为准确评估导航战条件下星间链路的整网抗干扰性能,对影响星间链路整网抗干扰性能的各种因素进行分析,并在此基础上对整网抗干扰性能评估场景进行建模设计。提出了以干扰场景遍历条件下的平均可工作概率为指标的星间链路抗干扰性能评估方法,定义了可用率评估指标体系,从而使准确、定量评估星间链路整网抗干扰性能成为可能。

Performance evaluation method based on average availability for inter-satellite links system

Independent and autonomous running of the entire GNSS system in navigation warfare is one of the most important aims of building inter-satellite links. However, it is inevitable that inter-satellite links will be faced with threaten from jams in navigation warfare, which will result in performance declining even breaking down. Therefore, exact evaluation of anti-jamming performance is very important. Anti-jamming performance evaluation of inter-satellite links system is much more difficult than other objects, as it is related to almost every aspect of the system, such as the design of signal system, network, linking strategy, equipment performance, and so on. In order to accurately evaluate the anti-interference performance of the entire inter-satellite links network under the conditions of navigation warfare, this paper firstly analyzed a variety of factors which affect the anti-jamming performance of inter-satellite links. On this basis, test scenarios for anti-jamming performance evaluation was modeled and designed. And then an evaluation method for anti-jamming performance of inter-satellite links system based on average availability was proposed, the index system for availability evaluation was defined, which made accurate and quantitative evaluation of anti-jamming performance of the entire inter-satellite links network possible.