Simple and efficient two-way ranging method for IEEE802.15.4a

IR-UWB (Impulse Radio Ultra Wideband) is commonly used for RADAR applications. Since the UWB standard IEEE802.15.4a has been introduced in 2004, UWB is also used for communication. Even tho the standard IEEE802.15.4a allows also to perform ranging, no ranging method is mandated. Ranging devices based on IEEE802.15.4a usually exchange timing data in order to determine the distance between each other. Our approach in this work is different and can be performed without any data exchange. The main advantages are shorter and less UWB-frames, higher repetition frequency of measurements, less power consumption and higher robustness. An UWB-Frame consists of 4 parts PREAMBLE and SFD (Start Frame Delimiter) for synchronization and PHR (Physical Header) and PSDU (Physical Service Data Unit) for data transmission.