Localization of passive target based on UWB backscattering range measurement

Impulse-Radio Ultra Wideband (IR-UWB) is a promising technology for indoor localization due to its robustness against multipath interference. In this paper, localization of passive reflector based on backscattering range measurement is investigated. The theoretical performance bound is derived, which can be used for both performance evaluation and system design. A closed-form position estimation is first given. Two least squares positioning algorithms are then proposed to refine the initial position estimation. Simulation result shows that both algorithms can achieve high positioning accuracy and approach the performance bound. An important conclusion drawn from this study is that to achieve good positioning accuracy, the localization system design should account for several factors such as the locator geometry and range measurement scheme for a specific region of interest.