Title: Design and Implementation of a Wireless Time Synchronization based Positioning System
Author(s): Sihao Zhao, Xiaowei Cui, Tianyi Ma, Mengdi Jia, Shuang Xu, Mingquan Lu
Published in: Proceedings of the 30th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2017)
September 25 - 29, 2017
Oregon Convention Center
Portland, Oregon
Pages: 767 - 772
Cite this article: Zhao, Sihao, Cui, Xiaowei, Ma, Tianyi, Jia, Mengdi, Xu, Shuang, Lu, Mingquan, "Design and Implementation of a Wireless Time Synchronization based Positioning System," Proceedings of the 30th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2017), Portland, Oregon, September 2017, pp. 767-772.
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Abstract: Positioning systems using radio frequency signals can be realized by various approaches among which a system with fixed base stations and mobile user devices is a typical implementation scheme. For such systems based on the time of arrival (TOA) measurement of wireless signals, positioning accuracy is affected by multiple factors. Specifically for a system using time difference of arrival (TDOA) measurements, the time synchronization error between base stations is a significant error source for the final user position result. In this work, a wireless synchronization scheme is proposed to estimate and compensate the time offsets between base stations. Furthermore, based on this scheme, a TDOA positioning system in which the user device transmits ultra-wide band signals and the base stations receive is designed and implemented. Test results shows a 100-picosecond level synchronization precision and a centimeter-level position accuracy.