HRRP代价函数优化方法的弹道导弹特征参数提取

摘要:进动角和进动周期是识别真假弹头的重要参数。为了提高进动参数的提取精度，提出了一种基于一维距离像的弹道导弹进动参数的提取方法。考虑到高速平动对HRRP的影响,建立了飞行中段弹头的进动模型。对一维距离像序列的最大互相关函数进行FFT变换，并对变换后的结果进行近似正弦波的频偏校正处理，得到精确的进动周期。同时基于一维距离像提取目标的径向长度，提出了对径向长度的目标函数优化的方法，提取进动角、进动周期、锥体高度、方位角、俯仰角等主要参数。通过仿真分析，与现有的几种提取方法比较，该方法进一步提高了提取精度。 

HRRP cost function optimization method for ballistic missile feature parameter extraction

Abstract: Precession angle and precession period are important parameters for identifying the true warhead. In order to improve the accuracy of extracting the precession parameters, a new method was proposed to extract the parameters of precession of ballistic missile based on HRRP. Considering the influence of high speed translation on the HRRP, a midcourse warhead precession model is established. FFT transform is performed on the maximum cross correlation function of one dimensional range image sequence, and the frequency offset correction is carried out the result of the transformation, in ordered to get the accurate procession period. At the same time, the radial length of the target is extracted based on the HRRP. A method for optimization of the cost function of radial length is presented. The precession angle, precession period, cone height, azimuth angle and pitching angle are extracted through it. Compared with the presented papers, the accuracy of precession parameters is improved.