Radar identification and countermeasures

先进的射频发射器，如现代雷达，能够在 实时的。了解他们对电磁频谱的使用以及他们与其他无线电频率用户的共存在军事和民用应用中都是重要的。本次CRD项目主要围绕两个方面展开： 1.雷达辐射源的分类和估计：从这种辐射源发出的信号取决于发射源的功能、环境、目标返回(如果辐射源是雷达)和操作员干预。在这个项目中，通过利用各种滴头动态的概率模型，我们的目标是识别/分类滴头，估计它们的运行模式，并预测未来的运行模式。以截获的信号为基础，这种“模型驱动”的方法 便于对复杂的多功能雷达进行快速分类并估计其模式(搜索、捕获、跟踪)。 2.电子对抗：移动平台上现代多模传感器的激增和复杂性极大地增加了电子对抗(ECM)功能的复杂性，ECM功能是为防止或降低这些传感器利用电磁频谱的有效性而采取的行动。电子对抗对于干扰雷达是必不可少的。在民用应用中，了解电磁干扰对雷达的影响是设计雷达的关键。 可以与其他用户共存并在系统存在的情况下高效运行的雷达 干扰(故意或非故意)。在传统的ECM系统中，干扰是在开环中进行的，而不利用后续测量数据中的大量信息。在本项目中，我们脱离了传统的ECM 针对实时电子对抗信息，采用自适应控制雷达干扰信号的方法。

Sophisticated radio frequency emitters such as modern radars have the ability to adapt their operating mode in real time. Understanding their usage of electromagnetic spectrum and their coexistence with other radio frequency users is important in military and civilian applications. This CRD project focuses on two aspects: 1. Radar Emitter Classification and Estimation: Signals radiated from such emitters depend on the functionality of the emitter, the environment, target returns (if the emitter is a radar) and human operator intervention. In this project, by exploiting probabilistic models for the dynamics of various emitters, our aim is to identify/classify emitters, estimate their operating mode and predict future operating modes. Based on the intercepted signals, such a "model driven" approach facilitates rapid classification of sophisticated multi-function radars and estimation of their mode (search, acquisition, track). 2.Electronic Countermeasures: The proliferation and complexity of modern multimode sensors on mobile platforms greatly complicates electronic countermeasure (ECM) functions, which are actions taken to prevent or reduce the effectiveness of these sensors use of the electromagnetic spectrum. Electronic countermeasures are essential for jamming radars. In civilian applications, understanding the effect of electromagnetic interference on radars is essential for designing radars that can co-exist with other users, and operate efficiently in the presence of systematic interference (deliberate or otherwise). In conventional ECM systems, jamming is done in open loop without exploiting substantial information in subsequent measured data. In the current project, we depart from conventional ECM approaches by adaptively controlling the real time radar jamming signal in response to real time ECM information.