UWB Reference-Free Self-Positioning with Electrical Scanning Directional Antenna

An Ultra-Wideband (UWB) self-positioning system and its architecture are presented. It consists of a pulse-based transceiver for ranging from the surrounding objects, an electrical scanning antenna for direction detection, and base-band positioning algorithms. Self-positioning can be performed by using the ranging and direction information based on reflected signals in a room environment. It can also determine its own position in the presence of some blocking objects by employing the so-called multi-layer reflection algorithm. This reference-free self-positioning system operated in an office meeting room is shown to be capable of achieving 30cm positioning accuracy with the 70% bound.