外太空有源假目标的运动学特性

弹道导弹突防过程中释放的有源干扰装置能够产生在能量、波形和相位调制等方面与目标回波高度逼近的假目标，这些假目标会共享雷达信号处理器的相干处理增益，使得传统的信号处理鉴别方法失效，并在数据处理层形成大量虚假航迹。该文从理论上分析了外太空有源假目标的运动学特性，推导了其在典型坐标系下的运动方程，揭示了有源假目标在运动学特性上和实体目标间的根本差异。首先，建立了统一的数学描述模型，推导了假目标在雷达站直角坐标系、雷达站球坐标系和地心坐标系下的运动方程；其次，根据运动方程分析了假目标的轨道、速度和加速度特性；最后，研究了相关因素对假目标运动学特性的影响。该文的分析结果可以为基于运动学信息鉴别有源假目标的系列方法提供理论指导。

Motional Characteristics of Exo-atmospheric Active Decoys

In the process of ballistic missile penetration, modern active jamming systems can generate decoys resembling true target echoes in aspects of energy, waveform, or even phase modulation. These decoys can share the radar signal processor’s coherent processing gain, making conventional signal-based discrimination methods invalidate and even form multiple false tracks at the data processor. In this paper, motion models of active decoys in typical coordinate systems (CS) are derived theoretically, and the motional characteristics of active decoys are analyzed in detail. These motion models can reveal the intrinsical dynamics differences between physical targets and active decoys. Firstly, uniform mathematical model is built up to derive the motion models in East-North-Up (ENU) CS, Radar spherical CS and Earth-centered fixed (ECF) CS. Secondly, the orbit, velocity and acceleration characteristics of active decoys are analyzed on the basis of motin models. And thirdly, performance analysis due to related elements are also covered. This study makes a contribution in that it has provided motion-based discrimination algorithms with theoretical basis.