弹道目标中段平动补偿与微多普勒提取

Translation Compensation and Micro-Doppler Extraction of Ballistic Target in Midcourse

弹道目标高速平动会使微多普勒产生平移、倾斜和折叠,必须进行补偿处理。针对弹道目标中段平动补偿问题,本文提出了一种基于多普勒极值点信息的平动参数提取和平动补偿方法。通过将平动近似为多项式描述,将微动等效为锥旋运动,推导了瞬时多普勒极值点与多项式参数和微动参数的关系。在此基础上,利用最小二乘参数辨识方法估计了平动参数,实现了平动补偿和微多普勒的高精度实时提取。仿真实验验证了本文算法的有效性。

The high velocity translation of ballistic targets will subject Micro-Doppler to translation,slope and fold.To compensate the translation of ballistic targets,a method based on Doppler extremum is proposed.Mathematics of Doppler extremum is derived on the basis that translation is approximated to a polynomial motion and the micro-motion is equivalent to a coning motion.Translation is compensated and micro-Doppler is extracted according to the parameters estimated by LS parameter identification method.Simulation results indicate that micro-Doppler can be effectively extracted through translation compensation method in the paper.