飞机目标的一维距离像特性

一维距离像已广泛应用于雷达自动目标识别 ,虽然一维距离像已将目标按距离分辨单元分割开 ,但每个分辨单元里还有许多散射点 ,该单元回波的复振幅为众多散射点子回波之和。当视角有微小变化时 ,其相位差的变化相当大 ,从而使各分辨单元的复振幅有大的起伏 ,所以一维距离像的方向敏感性十分强。对一维距离像的特性进行了研究 ,并通过预处理得到相对稳定的一维距离像。

Properties of Range Profile of Aircraft

High resolution range profile (HRRP) is widely used in radar automatic target recognition (ATR). Although a range profile can be divided into many range resolution cells, each of cell further contains the echoes of many scatterers and the complex amplitude of one range cell echo can be regarded as the sum of these echoes. A small aspect change will lead to a big change of the complex amplitude. Hence, the range profiles are very sensitive to the aspect angle, which makes the ART based on HRRPs a well known challenging problem. The properties of range profiles are investigated and a preprocessing scheme is presented to obtain stable range profiles for ATR.