Generalized ISAR Imaging of Sea Target
نویسنده
چکیده
A generalized ISAR approach to solve the SAR problem for ship target image reconstruction is considered. A new definition of three dimensional (3-D) SAR scenario is suggested. An analytical geometrical approach to define apparent Yaw, Pitch and Roll angle of the ship target at sea is implemented. The target is presented as an assembly of point scatterers. Mathematical expressions to calculate range distance to each point scatterer are derived. A SAR signal model based on a linear frequency modulated transmitted signal, 3-D geometry and reflectivity function of the target is derived. Image reconstruction procedure includes Fourier transform for range compression and Fourier transform for azimuth compression. To verify the generalized ISAR image reconstruction concept with respect to SAR problem a numerical experiment is carried out.
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