基于一维距离像的弹道中段目标特征提取

Feature Extraction of Ballistic Midcourse Target Based on HRRP

针对目标的HRRP投影长度提取不精确的问题,首先研究了中段目标的进动特性及其一维距离像在不同雷达视线角下的变化规律,提出了一种基于差分算法的目标投影长度提取方法。该方法利用了目标一维距离像散射中心的峰值效应,使处理后的一维距离像只会在散射中心处出现震荡效应,以此准确提取散射中心,克服了传统长度提取方法在散射中心周围重复搜索造成的误差。在此基础上,分析了目标投影长度随进动的变化规律,提出了一种进动角和目标真实长度提取方法。仿真实验表明以上方法具有很好的提取精度。

This paper first researched the precessional features of midcourse target and its HRRP in different radar posture angles and presented a new projective length abstract method.Based on the peak of the scattering center,this method makes the HRRP present a oscillation phenomenon on this account to abstract scattering center accurately.On this basis,this paper analysed the projective length with precessional motion and presented a new feature abstraction method on precessional angle and the length of the target.Simulation shows that the two methods can work accurately.