“Recent events have demonstrated that it is possible to change the course of a ship or force a drone to land in a hostile area by simply spoofing GPS signals,” explained CEA-Leti CEO Emmanuel Sabonnadière. “The increasing reliance on a GNSS for the execution of military operations and terrestrial, aeronautic and naval transportation requires using positioning and navigation systems that are able to detect GNSS outages and provide resilient position and navigation features.”
A version of FlexFusion that demands less of the CPU implements a loose coupling algorithm that uses GNSS receiver-output positions as entry of the algorithm. An advanced version implements a tight coupling fusion algorithm of GNSS and IMU data that significantly enhances the resilience of positioning and navigation under real-world conditions.
This novel approach enables total control of treatments and filtering applied to raw signals, which increases performance of the fusion. It also improves positioning performance in particular if there are fewer than four GNSS satellites available, or when there are recurrent multi-trajectories, which sometimes occur in urban canyons. CEA-Leti has licensed the patented FlexFusion algorithm to Orolia.
FlexFusion development was supported and partially funded by the Easytech program of IRT Nanoelec thanks to the French National Program “Programme d’Investissement d’Avenir” ANR-10-AIRT-05”.
CEA-Leti - www.leti-cea.com
Orolia - www.orolia.com