Overview of Wall-Clutter Suppression Techniques in Through-the-Wall Imaging Radar

In recent years, with the deepening of the research on through-the-wall imaging radar, wall-clutter suppression techniques have become a difficult problem in this field. In this paper, an echo model is first established under regular building scene, and the generation mechanism of wall-clutter is analyzed. Then, several representative wall clutter suppression algorithms are introduced, and their suppression effects, computation and applicable conditions are reviewed. Finally, the general improvement of the existing algorithms and the possible research directions in the field of through-the-wall radar are proposed.