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. https://doi.org/10.1109/PLANS.2014.6851434
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In