飞机雷达散射特征提取技术研究

On the Extractive Technique of Scattering Features of Aircraft Radar

雷达采用宽带信号后,分辨率远小于目标尺寸,就可以对目标进行二维逆合成孔径成像(ISAR),而二维ISAR图像反映了目标在成像平面上的几何投影及散射点的强弱分布,本文从ISAR图像中确定目标轮廓沿距离向和方位向的分布范围,对目标区域尺寸信息进行分析,根据图像中散射点的强弱分布,提取了目标强散射点的分布情况,达到了对目标电磁散射分布特征研究的目的,对于飞机隐身设计具有一定的指导意义。

After adopting broadband signal, the distinguishability of radar is far less than the target size. It can carry out 2D inverse synthetic aperture radar for the target, and 2D ISAR reflects the strength distribution of geometric projection and scattering point in the imaging plane of the target. This paper determines the distribution range of range direction and azimuth of the target outline from ISAR image, and analyzes the dimension information of target region. According to the strength distribution of scattering point in the image, it extracts the distribution of strong scattering point of the target, achieves the purpose of studying the distribution characteristics of electromagnetic scattering of the target. It has a certain guiding significance for stealth design of the aircraft.