Tightly-Coupled Opportunistic Navigation for Deep Urban and Indoor Positioning

Kenneth M. Pesyna, Jr., Zaher M. Kassas, Jahshan A. Bhatti, and Todd E. Humphreys

Abstract:	A strategy is presented for exploiting the frequency stability, transmit location, and timing information of ambient radio-frequency “signals of opportunity” for the purpose of navigating in deep urban and indoor environments. The strategy, referred to as tightly-coupled opportunistic navigation (TCON), involves a receiver continually searching for signals from which to extract navigation and timing information. The receiver begins by characterizing these signals, whether downloading characterizations from a collaborative online database or performing characterizations on-the-fly. Signal observables are subsequently combined within a central estimator to produce an optimal estimate of position and time. A simple demonstration of the TCON strategy focused on timing shows that a TCON-enabled receiver can characterize and use CDMA cellular signals to correct its local clock variations, allowing it to coherently integrate GNSS signals beyond 100 seconds.
Published in:	Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011) September 20 - 23, 2011 Oregon Convention Center, Portland, Oregon Portland, OR
Pages:	3605 - 3616
Cite this article:	Pesyna, Kenneth M., Jr.,, Kassas, Zaher M., Bhatti, Jahshan A., Humphreys, Todd E., "Tightly-Coupled Opportunistic Navigation for Deep Urban and Indoor Positioning," Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011), Portland, OR, September 2011, pp. 3605-3616.
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