Using a UWB radar imaging method with five antennas on a target with arbitrary translation and rotation motion

Developing usable technologies for indoor target detection is currently a topic of great interest. Ultra wide-band (UWB) radar is promising in this regard because of its high range-resolution. However, conventional UWB radar imaging systems are costly and impractical since they require a large antenna array to obtain high spatial resolution. This study proposes a new imaging method for a simple UWB radar system using the motion of the target. The imaging method employs five antennas for estimating the motion of a target, including its rotation. Previous work deals only with the translation motion of a target ignoring the rotation, which makes the method impractical. The proposed method, an extension of the previous method, obtains an accurate image for an unknown-shaped target with arbitrary translation and rotation. Numerical simulation results show that the proposed method is able to estimate the target´s shape and its motion.