Abstract
We present an e-cient way to generate the inverse synthetic aperture radar (ISAR) image of a target at an arbitrary aspect angle using the shooting and bouncing ray (SBR) method, which is much faster than the conventional approach by inverse Fourier transforming the computed scattered flelds over frequency and aspect domain. We propose a general image-domain ray-tube integration formula, which contains aspect-dependent factors. The new formula can provide ISAR images of a target rapidly and conveniently in difierent image planes at difierent aspect angles in a world coordinate system. The ISAR images of a cube and an aircraft for several aspect angles and difierent image planes are presented to demonstrate the e-ciency and accuracy of the general formula. The proposed method is more signiflcant when large amount of ISAR images of a target are required to build the database for target recognition.
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