利用宽带回波的目标微动参数提取方法

Method of extracting target micro-motion parameters using wideband echo

高速目标平动补偿是弹道目标微动特征信息提取中一个较难解决的问题.利用弹道导弹宽带回波信号,提出了一种基于散射中心极化散射特性的非相干宽带回波对齐方法,通过极化相似性参数实现散射点中心对齐,并利用目标散射中心的高分辨一维距离像走动提取瞬时微动参数,对目标的尺寸和微动参数进行估计.仿真结果表明,该方法可以有效地在较低信噪比下实现包络对齐与微动参数提取,为后续工程化应用奠定了理论基础.

The translational compensation for high-speed targets is a difficult problem to be solved in the extraction of micromotion-featured information of ballistic targets.This paper uses the wideband echo signals of ballistic missiles to propose an incoherent wideband echo alignment method based on the polarization scattering characteristics of the scattering center,with the center alignment of scattering points realized by polarization similarity parameter.The paper also uses the high-resolution one-dimensional range profile of the target scattering center to extract the instantaneous micromotion parameters,and then to estimate the size of the target and the micromotion parameters.Simulation results show that the proposed method can effectively achieve envelope alignment and micromotion parameter extraction at low SNR,which lays a theoretical foundation for the subsequent engineering application.