Frequency and Time Synchronization of a Wireless Sensor Network with Signals of Opportunity

Hans-Martin Tröger, Lucila Patiño-Studencka, Markus Hartmann, Thomas Lindner, Stefan Ereth, Albert Heuberger, Jörn Thielecke

Abstract:	In wireless sensor networks used for positioning, the localization performance is generally closely connected to the time and frequency synchronization precision of the sensor nodes. In this paper we present an asset tracking system for indoor localization of goods, which is synchronized with the help of so-called Signals of Opportunity. Algorithms, originally developed for the decoding of DVB-T terrestrial broadcast signals, can be used for the synchronization of the receiver nodes. With a modified tracking loop, the frequency error between the local clock and the DVB-T transmitter clock can be continually estimated and corrected. Afterwards, a basic concept for time synchronization between the receiver nodes will be presented. Finally, the paper will conclude with an exemplary calculation of the time synchronization performance of the proposed concept.
Published in:	Proceedings of the 46th Annual Precise Time and Time Interval Systems and Applications Meeting December 1 - 4, 2014 Seaport Boston Hotel Boston, Massachusetts
Pages:	117 - 123
Cite this article:	Tröger, Hans-Martin, Patiño-Studencka, Lucila, Hartmann, Markus, Lindner, Thomas, Ereth, Stefan, Heuberger, Albert, Thielecke, Jörn, "Frequency and Time Synchronization of a Wireless Sensor Network with Signals of Opportunity," Proceedings of the 46th Annual Precise Time and Time Interval Systems and Applications Meeting, Boston, Massachusetts, December 2014, pp. 117-123.
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