ISAR imaging of rotating targets via estimation of rotation velocity and Keystone transform

Inverse synthetic aperture radar (ISAR) imaging of high-speed maneuvering targets via rotation velocity estimation combined with Keystone transform can produce high resolution. By applying the keystone transform, the range migration can be removed. Target's rotation velocity is estimated by improved prominent points method. Finally, ISAR imaging of rotating targets can be obtained by applying rotational motion compensation (RMC). Numerical examples show that the proposed approach is efficient in recovering the high resolution ISAR image.