SAR echo-wave signal simulation system based on MATLAB

Raw echo-wave signal simulation of Synthetic Aperture Radar for three-dimensional complicated natural scene targets is a key research subject in Synthetic Aperture Radar system simulation. This paper presents an improved random-midpoint displacement method to interpolate raw DEM data and make up the simulating natural scene targets. Physical optics calculation (PO) method in the electromagnetism theory is used to compute the scattering contribution of the cell surface targets and the ray-tracing method is used to estimate the back-scattering contribution of the shadow cell surface. In this paper, the mathematic model of echo-wave signal of SAR is presented. A novel graphical user interface (GUI) based on the Matlab platform is described and realized. The simulation test has been finished by the method and the simulation platform. The results of test indicate that the simulation method can satisfy the prophase SAR system research and analysis.