A UWB-based localization scheme in Wireless Sensor Networks

A UWB-based localization scheme using RSSI-margin Localization algorithm (RMLA) for Wireless Sensor Networks (WSN) is proposed. Specially, this localization scheme chooses every cluster of network as the basic units. Anchor nodes of each cluster use the periodic UWB signals to send their own position information. When target nodes get these information, they estimate distances to these anchor nodes by Path-Loss model. Differently, we take margin of these distances and solve the non-linear equation by Taylor series expansion. Initial value is chosen specially to improve the accuracy. Simulation result indicates this algorithm has better performance than classical algorithm.