弹道导弹目标回波模拟与微动特征提取

Echo Simulation and Micro-motion Feature Extraction of Ballistic Missile Targets

对弹道导弹目标的运动特性和散射特性进行分析,建立了弹头的微动模型,并较为逼真地仿真了弹头的轨道运动轨迹,在此基础上引入准静态技术的思想,提出了考虑弹头脉内运动的雷达回波模拟方法。同时计算了经过平动和微动调制后的弹头雷达截面积(Radar Cross Section,RCS)数据,而后对弹头RCS数据进行了分析,最后利用希尔伯特-黄变换(Hibert-Huang Transform,HHT)时频分析算法从弹头RCS数据中成功提取出了进动周期,处理结果表明模型可行有效,为弹道导弹目标的识别提供了技术基础。

The paper analyzes the motion properties and scattering properties of ballistic missile targets,establishes the warhead micro-motion model and a more realistic simulation result of warhead orbit motion is also given,on the basis,the idea of quasi-static is introduced and the radar echo simulation method which consideres the pulse motion is given.The paper also calculates the warhead RCS data which is modulated by transition and micro-motion and the warhead RCS data is analyzed,then the precession cycle is successfully extracted based on Hibert-Huang Transform（HHT）from warhead RCS data.The results showed that the model is feasible and effective and it provides a technical basis of Ballistic Missile Targets recognition.