基于高分辨距离像序列的锥柱体目标进动和结构参数估计

Precession and Structure Parameters Estimation of Cone-cylinder Target Based on the HRRPs

弹道目标特征参数估计是进行目标识别的基础。针对缺少先验参数信息时锥柱组合类弹头目标进动和结构参数联合估计难题,该文提出一种基于高分辨距离像序列实现锥柱体目标进动和结构参数联合估计新方法。以旋转对称锥柱体目标为研究对象,基于静态电磁散射数据,结合目标运动模型仿真生成了目标高分辨距离像序列,分析了4个观测区域内锥柱体目标的1维距离像特性。研究了常见雷达观测视角内锥柱体各散射中心的1维距离像序列变化规律,建立了序列中散射中心间的相对位置变化的极值与目标参数之间的关系式,据此完成了锥柱体目标进动和结构参数的联合估计。最后,仿真实验结果验证了文中方法的有效性和适应性。

Feature parameters estimation for ballistic targets is the basis of target recognition. Because of the difficulty to estimate the precession and structure parameters of a cone-cylinder target jointly without prior knowledge of parameters, a new method for the cone-cylinder target＇s precession and structure parameters estimation is proposed based on High Range Resolution Profile sequences （HRRPs）. The HRRPs of the rotary symmetrical cone-cylinder target are simulated and analyzed in four attitude angle regions respectively based on static electromagnetic scattering data. The trace of each scatter in the HRRPs is researched in the common radar viewing aspect, and the relationship between the extreme value of three scattering centers＇ relative positions in the HRRPs and the target＇s parameters is built, then the precession and structure parameters are estimated simultaneously. Finally, the estimation results of feature parameters show that the proposed method is effective and adaptive.