High-resolution through-wall imaging

A new technical approach for 'Through Wall Imaging', implemented with in the Xaver 800 system is introduced in this paper. The system is a portable Ultra-wideband (UWB) micro power radar that offers a comprehensive solution for field operational use. The Xaver 800 gives the user fast and reliable 3D visual information, the system shows objects situated behind walls with sufficient resolution such that a person can be observed including his different body parts. Enabling rich imaging capabilities and ease of use, the Xaver 800 gives the user the ability to make the right decisions and to run more efficient 'life saving' operations. One of the main problems with the current available through wall technologies is their low resolution, "Blob" like results limits their ability to be an effective tool in the field. Higher resolution can theoretically be achieved by widening the bandwidth of the UWB signals used in these systems. However, working with high bandwidth signals creates other challenges such as the un-alignment problem. Multi channels unaligned system can result in unfocused and distorted images. This paper deals with the un-alignment problem and suggests a few methods to solve it by coherent registration. Experimental results are given to prove the effectiveness of the different methods proposed.