Study of a method for 2-D imaging of simple-shaped targets with arbitrary motion using UWB radar with a small number of antennas

Ultra-wideband (UWB) pulse radar is an effective device as the basis for building a high-precision surveillance system. The fast SEABED (Shape Estimation Algorithm based on BST and Extraction of Directly scattered waves) imaging algorithm is capable of accurately estimating target shapes using UWB pulse radar. A new UWB radar imaging algorithm, based on an extension of the SEABED algorithm that uses the motion of a target, was proposed in our previous work. This is unlike the conventional SEABED system that assumes a scanning antenna. Using a simple system with three fixed antennas, this imaging method has been verified as being viable even for targets with arbitrary motion. This study examines the performance limits of the method under various conditions. The numerical simulation establishes that the proposed method can accurately estimate the target shape even under severe conditions. Moreover, we clarify that the proposed method estimates a target shape with high accuracy and in a shorter time compared with conventional methods.