Title: Evaluation of Relative Clock Stability in Cellular Networks
Author(s): Joe J. Khalife and Zaher M. Kassas
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: 2554 - 2559
Cite this article: Khalife, Joe J., Kassas, Zaher M., "Evaluation of Relative Clock Stability in Cellular Networks," Proceedings of the 30th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2017), Portland, Oregon, September 2017, pp. 2554-2559.
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Abstract: The relative stability of base transceiver station (BTS) clocks in cellular networks is studied. It is demonstrated that although BTS clocks are not perfectly synchronized to GPS, they are relatively stable with respect to each other, permitting exclusive navigation with cellular signals in the absence of global navigation satellite system (GNSS) signals. A navigation observable is developed leveraging the relative stability of BTS clocks and a stochastic dynamical model for the clock deviations is proposed. Experimental data to multiple BTSs over twenty-four hours are presented.