A New Approach for Terrain Following Radar Based on Radar Angular Superresolution

Terrain following radar (TFR) is a particular airborne equipment that can assist the pilot in his task of staying close to the ground and yet avoiding obstacles. Angular resolution is crucial for TFR, but it is limited by the beam width of antenna. To overcome this problem, angular superresolution technique is adopted in TFR. First, received signal in vertical plane is modeled as a mathematical convolution of the antenna pattern and the targets’ scattering. Then principles of the angular superresolution algorithm and range migration correction method are presented. Simulation result validates that the method can effectively improve the angular accuracy of TFR in vertical plane.