Three dimensional ISAR imaging method based on amplitude scanning

Three-dimensional inverse synthetic aperture radar (ISAR) imaging system based on amplitude scanning was studied. It could solve the problem that the interferometric inverse synthetic aperture radar (INISAR) system could not distinguish the targets with the same range distance and azimuth but different amplitude. The range cell migration problem caused by large angle rotation was also considered. The proposed system was constructed by adding an amplitude scanner on traditional ISAR system which could have resolution on amplitude domain to present for three dimensional imaging. On the basis of traditional two-dimensional ISAR convolution integral method, the amplitude information was decoupled. The resolution was then deduced in spatial frequency domain. The proposed method was testified by complex simulation results, which shows that the proposed method can be used to acquire high quality and high resolution image.