High Resolution Robust GPS-free Localization for Wireless Sensor Networks and its Applications

摘要

In this thesis we investigate the problem of robustness and scalability w.r.t. estimating the position of randomly deployed motes/nodes of a Wireless Sensor Network(WSN) without the help of Global Positioning System (GPS) devices. We propose afew applications of range independent localization algorithms that allow the sensorsto actively determine their location with high resolution without increasing the complexity of the hardware or any additional device setup. In our first application we tryto present a localized and centralized cooperative spectrum sensing using RF sensornetworks. This scheme collaboratively sense the spectrum and localize the whole network efficiently and with less difficulty. In second application we try to focus on howefficiently we can localize the nodes, to detect underwater threats, without the use ofbeacons. In third application we try to focus on 3-Dimensional localization for LTEsystems. Our performance evaluation shows that these schemes lead to a significantimprovement in localization accuracy compared to the state-of-art range independentlocalization schemes, without requiring GPS support.