A 3-D Imaging Method of GPR Based on BP Algorithm

Impulse ground penetrating radar has been widely used in detection of object subsurface. As the dielectric property is different between media subsurface and air, the transmitting signal would change its propagation path and velocity when detecting object subsurface. The velocity is not constant and propagation path is not a straight line because of refraction. At the same time because impulse has no phase, the traditional SAR imaging methods would not been suitable for the SAR imaging of impulse pulse any more. So a 2-D and 3-D imaging methods based on hyperbola matching and hyperboloid matching for the imaging of object subsurface are introduced in this paper. At last the imaging method is verified by computer emulation.