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Sufficient intercommunication between ranging module and positioning module was lacked during the current research on the localization issue for IR-UWB wireless sensor networks. The idea of integrative ranging and positioning was proposed in this paper. The ranging module was designed to provide not only the range estimation results to the positioning module, but also the corresponding reliability...
Accurate geolocation techniques using IR-UWB (impulse radio ultra-wideband) signals have gained more and more interests recently. To exploit the fine time resolution of IR- UWB most, TOA (time of arrival) based ranging is the most appropriate technique. Considering the challenges for the design of TOA estimation algorithms in many aspects, a three-step match-filtering detection based algorithm is...
Localization is essential for wireless sensor networks (WSNs). It is to determine the positions of sensor nodes based on incomplete mutual distance measurements. In this paper, to measure the accuracy of localization algorithms, a ranging error model for time of arrival (TOA) estimation is given, and the Cramer-Rao bound (CRB) for the model is derived. Then an algorithm is proposed to deal with the...
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