Through-wall building image improvement via signature-based CLEAN

The radar signal processing involves post-processing of the received radar echoes to extract target information. There is an increasing interest to employ radar signals for information gathering and imaging of selected objects with the environment. A more focused interest relates to imaging of concealed items and through-wall imaging fits that category. The challenge faced in through-wall radar sensing relates to the attenuation and distortion of signals propagating through one or more walls prior to interacting with objects of interest. In addition, radar images obtained by near-field sideby scanning are heavily dominated by the scattering of the exterior walls and thereby obscuring the interior details which are of primary interest. This is illustrated in Figure 1.