基于一维像序列的中段雷达目标进动特征提取  

Precession Feature Extraction of Midcourse Radar Target Based on HRRP Series

作　　者：金光虎[1] 朱玉鹏[1] 高勋章[1] 黎湘[1] 

机构地区：[1]国防科技大学电子科学与工程学院空间电子信息技术研究所,湖南长沙410073

出　　处：《信号处理》2009年第5期771-776,共6页Journal of Signal Processing

摘　　要：弹头和诱饵在外形和散射特性上有很多的相似处,但是进动特征有很大差别,反演进动周期、进动角等特征将有助于解决弹头、诱饵的识别问题,本文以中段旋转对称体目标为研究对象,分析了该类目标的散射特性,提出了移动散射点模型,分析了自旋、进动对目标一维像的影响,提出了基于相关图估计进动周期的方法,并从理论上推导了进动周期内一维像长度的变化,得到了一维像长度极小极大比与进动角等参数的关系,提出了迭代寻优求解三参量非线性方程的方法,并通过实验进行了验证,结果表明,算法稳定、可靠,估计精度较高。Warheads and decoys have many similarities in the shape and scattering behavior. But the precession parameter is different. Extracting precession period,precession angle will help solve the problem of discriminating the warheads from decoys. This paper objects at the mideourse rotate symmetric target. The scattering behavior of the target is analyzed and the moving scattering center model is built. The author studies the effect of the spin and precession on the HRRP and presents a novel precession period extracting algorithm based on correlation image. The paper reasons out the relationship between precession angle and the rate of min to max HRRP length and provides the iterated optimization algorithm of solving the three-parameter nonlinear formulation. Lastly, the paper gives the result based on the experiment. And the result shows that the arithmetic is robust and stable with good precision.

关 键 词：进动周期 进动角 半锥角 相关图 

分 类 号：TN957.52[电子电信—信号与信息处理]