一种高速自旋目标三维成像新算法

提出了一种基于二维频谱匹配滤波器组的高速旋转目标三维ISAR成像的算法.每个频谱匹配滤波器能输出对应散射点的聚焦切片.从各个滤波器组输出的聚焦切片提取聚焦点的三维空间参数,可以构建目标的三维像.已有的基于广义Radon 变换 (GRT) 和扩展的Hough变换 (EHT) 实现旋转目标三维空间信息提取的算法,由于是对散射点逐点进行投影,因此运算量很大,效率很低.该算法采用的是匹配滤波的处理方法,在处理过程中使用快速傅里叶变换(FFT), 使计算效率显著提高.计算机仿真验证了这种算法的正确性.

New algorithm for high-speed spinning target 3D ISAR imaging

A 2D spectrum matched filter banks based 3D ISAR imaging algorithm for a target in high speed spinning is proposed. Each spectrum matched filter bank yields a focused slice for corresponding scatterers. By extracting the spatial parameters from all the slices, the 3D image of the target can be constructed. The existing GRT and EHT based algorithm is low in efficiency since the projection procedure is carried out scatterer by scatterer. However, our approach is based on the matched filtering theory, and by applying FFT, it has a low computational load. Numerical simulation confirms the validity of the algorithm.