Fast Multiple Fault Detection and Exclusion (FM-FDE) Algorithm for Standalone GNSS Receivers

• Numerous applications and devices use Global Navigation Satellite System (GNSS)-provided position, velocity and time (PVT)information. However, unintentional interference and intentional attacks render GNSS-provided information unreliable. ReceiverAutonomous Integrity Monitoring (RAIM) is considered an effective and lightweight protection method when a subset of the availablesatellite measurements is affected. However, the conventional RAIM Fault Detection and Exclusion (FDE), exhaustive iterative searchto exclude faulty signals, can be expensive when there are many potential faults, especially so for multi-constellation GNSS receiversoperating in the presence of several faulty signals. Therefore, we propose a fast multiple fault detection and exclusion (FM-FDE)algorithm, to detect and exclude multiple faults for both single and multi-constellation receivers. The novelty is FM-FDE caneffectively exclude faults withouta lengthy iterative search on candidate fault signals. FM-FDE calculates position distances of anysubset pairs with (3+P) measurements, where P is the number of constellations. Then, the algorithm utilizes statistical testing toexamine the distances, identifies faulty measurements and further excludes them from the computation of the final PVT solution. Weevaluate FM-FDE with synthesized faulty measurements added to a collected data set; the results show that FM-FDE is faster thanconventional Solution Separation (SS) FDE when the number of faults is larger than 3 in a single constellation receiver. Moreover,FM-FDE is much faster when the number of faults is larger than 2 in a GPS-Galileo receiver, when both constellation contains faultymeasurements. The trade-off is that FM-FDE slightly degrades performance in terms of misdetection and false alarm probabilities,compared to the conventional SS FDE.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Reglerteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Control Engineering (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Kommunikationssystem (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Communication Systems (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

Electrical Engineering

Elektro- och systemteknik

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