基于时间-距离像的弹道目标进动特征提取新方法

进动是弹道目标最常见的微动形式，进动特征的差异为雷达识别真实弹头和诱饵提供了一种新的途径。针对弹道目标的进动特性，推导了弹道目标上任意一散射点的进动径向距离变化数学模型。通过分析散射点一维距离像随时间变化的规律，提出了一种基于时间-距离像的弹道目标进动特征提取新方法。该方法首先从弹道目标时间-距离像信号中准确提取出所有强散射点径向距离变化的线性和信号，进而通过分析这一信号的频谱特性，估计出了弹道目标的自旋、锥旋频率及进动角。计算机仿真结果表明:该方法具有很高的估计精度和良好的抗噪性。 

A New Procession Signature Extraction Method of Ballistic Target Based on Range-profile

Precession is the ballistic target’ s most common micro-motion type,while the differences of precession characteristics provide a new approach to identify the real warhead and decoys.According to the characteristics of precession ballistic targets,the radial distance mathematic model is derived,and then,a novel method to extract the precession characteristics based on range-profile is proposed after analyzing the variation regularity of range profile peaks.The linear sum signal of scatters’ radial distance is estimated from time-profile signal,and precession parameters can be extracted by the sum signal’s spectral characteristics.Simulation results show that this method has the advantages of good anti noise performance and high estimating precision.