Localization Technology in Wireless Sensor Networks Based on UWB

On the basis of ranged-based methods, in this paper, we will raise a ranging method of TOA (Time of Arrival) based on ultra-wideband (UWB) communication technology. UWB signal have many beneficial characteristics such as good confidentiality, strong penetrating ability, high positioning accuracy and low power consumption. However, for the application of the node localization, UWB direct signal is difficult to detect accurately. In this paper, the first signal arrival time and the strongest amplitude signal arrival time are weighted to get the time of direct signal, and we calculate weighting coefficient by the use of fuzzy logic technology. The simulation results show that localization technology based on UWB can greatly improve localization accuracy.