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Sensors 2017, 17(4), 795;

A Novel Robust Trilateration Method Applied to Ultra-Wide Bandwidth Location Systems

Key Laboratory of Intelligent Control and Decision of Complex Systems, School of Automation, Beijing Institute of Technology, Beijing 100081, China
Authors to whom correspondence should be addressed.
Received: 14 February 2017 / Revised: 25 March 2017 / Accepted: 31 March 2017 / Published: 7 April 2017
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Due to the non-line-of-sight (NLOS) and multipath fading channel (MPF) of the wireless networks, the non-existence of the intersection point often occurs in the range-based localization methods, e.g., the centroid-based trilateration method. To alleviate the problem, a confidence-based intersection method which expands the range of the circle within a certain confidence interval is proposed. In the method, the confidence interval is estimated based on the Cramér–Rao lower bound of the time of flight (TOF) measurement. Furthermore, an intersection determination method is proposed to select the intersection point with higher confidence level. The simulation and experimental results show the superiority of the proposed method in localization accuracy and robustness to noise compared to the conventional trilateration method, e.g., the centroid-based and least squares based trilateration methods. View Full-Text
Keywords: trilateration; intersection determination; confidence level trilateration; intersection determination; confidence level

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Li, J.; Yue, X.; Chen, J.; Deng, F. A Novel Robust Trilateration Method Applied to Ultra-Wide Bandwidth Location Systems. Sensors 2017, 17, 795.

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