Designing and Evaluating Next Generation of Resilience Receivers

S. Cancela, D. Calle, G. Arroyo, A. Dalla Chiara, G. Da Broi, O. Pozzobon, C. Sarto, J. Winkle, I. Krol, P. Webster, I. Fernández-Hernández, J. Simón, G. Seco-Granados

Abstract:	The Galileo program is in continuous evolution to develop and deploy all the necessary elements and functionalities for the provision of the Galileo services. In this regard, the European Commission (EC) has been working together with the European GNSS Agency (GSA) and industry for the definition, demonstration and performance assessment of the future capabilities of the Galileo Commercial Service (CS). With this purpose, the Navigation Authentication through Commercial Service-Enhanced Terminals (NACSET) project has been recently launched. The project has a twofold objective: to study and assess system evolutions for cryptographic key management, and to develop a resilient receiver combining receiver aids and sensors with the Galileo CS Authentication features to increase robustness against spoofing attacks. NACSET comprises the design, implementation and experimentation phases of two key elements: a key management simulator (KMS) that will support the cryptographic key generation, transmission, storage, renewal and destruction, including signal-in-space and ground-assisted solutions; and a Commercial Service Resilient PVT Platform (CS-RPP), a navigation platform with improved anti-attack techniques based on different elements: two antennas, atomic clocks, dedicated signal processing techniques, inertial sensors, and remote assistance for navigation authentication and time synchronization through non-GNSS channels. This paper presents the NACSET system, architecture, elements and operational modes. The assistance service and user terminal are described in detail, including the characteristics of all its elements: antennas and RF Front End (E1-E6 enabled), CSAC and TCXO clock features, signal processing techniques, IMU features, PVT algorithms (including integrity and authentication) and secured communication protocols. Special focus is put on the definition of the anti-spoofing measures to be implemented in the User Terminal, including Angle-of-arrival and Automatic Gain Control interference detection, clock drift monitoring, anti-replay signal processing techniques, etc., all integrated with the level of authentication obtained from code-encrypted Galileo CS signals.
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:	3910 - 3923
Cite this article:	Cancela, S., Calle, D., Arroyo, G., Chiara, A. Dalla, Broi, G. Da, Pozzobon, O., Sarto, C., Winkle, J., Krol, I., Webster, P., Fernández-Hernández, I., Simón, J., Seco-Granados, G., "Designing and Evaluating Next Generation of Resilience Receivers," Proceedings of the 30th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2017), Portland, Oregon, September 2017, pp. 3910-3923. https://doi.org/10.33012/2017.15154
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