基于物理光学方法二面角反射器一维距离像特征信号计算

Physical Optics Approximation to the Range ProfileSignature of a Dihedral Corner Reflector

二面角是众多雷达目标中的典型散射结构，是典型的二次散射体，其特征识别对于复杂目标的识别具有重要意义。首先在频域内应用ＰＯ光学计算方法得到二面角的散射信号，通过ＩＦＴ变换得到时域散射信号。采用幅度调制信号与目标的时域散射信号进行卷积，即得到目标的距离像。一维距离像是二维合成孔径成像的基础。

Dihedral corner reflector is an important geometry because it is a basic canonical shape that exhibits a double-bounce phenomenon. The inverse Fourier transform is used in conjunction with the frequency-domain description to obtain a high-frequency analytical approximation to the impulse response of the dihedral reflector. An amplitude modulated (AM) pulse is convolved with the impulse response of the target to yield the range profile signature, which is the first step for generating a two-dimensional synthetic aperture radar (SAR) image of the scatter.