A high-resolution 3-D imaging algorithm with linear array antennas for UWB pulse radar systems

UWB pulse radar systems have a great potential for a high-resolution imaging in indoor environments. For a real-time imaging, we have already proposed a fast 3-dimensional imaging algorithm called SEABED based on a reversible transform BST (boundary scattering transform) between the received signals and the target shape. SEABED can be applied only to a mono-static radar system. Therefore, the resolution of the image is limited to the sampling number of the scanning. Moreover, we have to scan an antenna on a plane for 3-D imaging, which requires too long time. In order to avoid this difficulty, we utilize a linear antenna array system and propose a high-resolution imaging algorithm for this system based on a newly-developed reversible transform BST for a bi-static antenna. This method enables us to remarkably enhance the imaging resolution. By a numerical simulation, we clarify that the proposed method has a much higher resolution in the 3-dimensional imaging than the conventional SEABED method