The research of short-range moving target 3-D ISAR imaging

Inverse synthetic aperture radar is widely used for radar imaging of targets, such as aircrafts, ships, missiles and so on. Conventional 2-D ISAR imaging can only obtain the projection in the range-Doppler plane. It cannot get the actual physical size and relative position of the scatter. What´s more, in the traditional ISAR imaging radar system, the target is located in the far-field region. This paper presents a short-range moving target 3-D ISAR imaging method. By using the wavefront reconstruction algorithm, we can get the 2-D image of the target, and then through the interferometric processing of two ISAR images, the third dimension coordinate information is obtained. Simulation results show the feasibility of the algorithm.