Three Dimensional Through-the-Wall Imaging Using Ultrawideband (UWB) Sensors with Enhanced Delay-and-Sum Algorithm

In improving through-the-wall imaging technology, a 3-D imaging technique is developed combining enhanced delay-and-sum algorithm, EDAS and multistatic radar measurement. In this research, the scene was simulated using finite-difference time-domain, FDTD based software Meep, and then the image was reconstructed in Matlab and visualized using ParaView. A method to compensate the wall refraction in 3-D is developed and tested. The effect of freespace assumption on the 3-D images are presented and discussed. The result shows that 3-D imaging reveals more geometrical information of the target and EDAS had significantly increased the contrast and reduced the clutter.