Simultaneous Position Estimation & Ambiguity Resolution (SPEAR) for High-Integrity Carrier-Phase Navigation with Robustness to Tracking Loss

J.H. Rife

Abstract: This paper introduces a GNSS processing algorithm called simultaneous position estimation and ambiguity resolution (SPEAR), with the goal of delivering high-accuracy, high-integrity navigation with robustness to carrier-tracking interruptions. The algorithm operates by continuously applying integer constraints to estimate the navigation solution recursively as a histogram of possible state values. The proposed approach is distinctive in that it decomposes the carrier-wave measurement into two components: an apparent integer difference, used for Bayesian prediction, and a fractional phase, used for Bayesian correction. The algorithm has potential application for high-accuracy, high-integrity safety of life operations near buildings or other obstructions of the sky, as may occur during aircraft surface movement or automobile navigation in urban canyons.
Published in: Proceedings of IEEE/ION PLANS 2014
May 5 - 8, 2014
Hyatt Regency Hotel
Monterey, CA
Pages: 692 - 700
Cite this article: Rife, J.H., "Simultaneous Position Estimation & Ambiguity Resolution (SPEAR) for High-Integrity Carrier-Phase Navigation with Robustness to Tracking Loss," Proceedings of IEEE/ION PLANS 2014, Monterey, CA, May 2014, pp. 692-700.
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