Methodology for GPS Synchronization Evaluation with High Accuracy

Li, Zan; Braun, Torsten; Dimitrova, Desislava Cvetanova (May 2015). Methodology for GPS Synchronization Evaluation with High Accuracy. In: The IEEE 81st Vehicular Technology Conference (VTC2015-Spring) (pp. 1-6). IEEE 10.1109/VTCSpring.2015.7145929

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Clock synchronization in the order of nanoseconds is one of the critical factors for time-based localization. Currently used time synchronization methods are developed for the more relaxed needs of network operation. Their usability for positioning should be carefully evaluated. In this paper, we are particularly interested in GPS-based time synchronization. To judge its usability for localization we need a method that can evaluate the achieved time synchronization with nanosecond accuracy. Our method to evaluate the synchronization accuracy is inspired by signal processing algorithms and relies on fine grain time information. The method is able to calculate the clock offset and skew between devices with nanosecond accuracy in real time. It was implemented using software defined radio technology. We demonstrate that GPS-based synchronization suffers from remaining clock offset in the range of a few hundred of nanoseconds but the clock skew is negligible. Finally, we determine a corresponding lower bound on the expected positioning error.

Item Type: Conference or Workshop Item (Paper)
Division/Institute: 08 Faculty of Science > Institute of Computer Science (INF) > Communication and Distributed Systems (CDS)
08 Faculty of Science > Institute of Computer Science (INF)
UniBE Contributor: Li, Zan; Braun, Torsten and Dimitrova, Desislava Cvetanova
Subjects: 000 Computer science, knowledge & systems
500 Science > 510 Mathematics
Publisher: IEEE
Language: English
Submitter: Jonnahtan Eduardo Saltarin de Arco
Date Deposited: 06 Mar 2015 08:41
Last Modified: 22 Aug 2015 01:30
Publisher DOI: 10.1109/VTCSpring.2015.7145929
BORIS DOI: 10.7892/boris.64094
URI: http://boris.unibe.ch/id/eprint/64094

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