Sliding Scattering Center Extraction for Streamlined Radar Targets

Modern man-made targets with high-speed movement capabilities are often designed as special streamlined structures. As a result, when illuminated by radar, the surface of such targets will produce a sliding scattering center (SSC) whose position changes with the radar line of sight (RLOS). In this communication, we present a feature extraction technique for this kind of scattering center. The trajectory of the equivalent scattering points in the 1-D high-resolution range profile (HRRP) sinogram is first predicted by utilizing the special geometric characteristics of sliding scatterers. The parameters of sliding scattering features are then extracted by combining the basis pursuit algorithm with the predicted trajectory. Examples from both numerical and measured data are presented to demonstrate the usefulness of the proposed technique.