Building Layout Tomographic Imaging Method with Sparse Scan Angles

In building layout tomographic imaging, limited by detection efficiency and actual environment, the transmitting and receiving nodes can only scan the building from a few sparse angles. This results in obvious artifacts and inaccurate wall parameters in the imaging results. Aiming at the situation of sparse scan angles, this paper proposes an improved building layout tomographic imaging method with wide band signals. First, the direct path delay is estimated from the original signal and canceled with the empty scene delay. Then, a linear tomographic projection model is established according to the canceled direct path delay. In addition, an improved algebraic reconstruction technique (ART) with an adaptive total variation (TV) descent algorithm and an adaptive projection matrix modification approach is proposed. Finally, the effectiveness of the proposed method is verified by numerical simulation.