Vector Tracking Loop for Autonomous Vehicles (VTL4AV)

Last Updated: 22/07/2025 08:49     Created at: 22/07/2025 08:11

On 16 July 2025, Telespazio UK, in a consortium with Cranfield University and with the support of Spirent Communications, delivered the final presentation of the NAVISP EL1-066 bis Vector Tracking Loop for Autonomous Vehicles (VTL4AV) project, concluding a multiyear effort to design and demonstrate a vector tracking loop GNSS receiver deeply coupled with an Inertial Measurement Unit (IMU).  Also fault detection and exclusion strategies were implemented.  The selected architecture implements an SDR-based prototype, and has validated performance through simulated jamming, multipath and NLOS tests as well as field trials in Cranfield and London. Project objectives included multi GNSS support, EKF based PVT estimation, RAIM and spoofing detection, and quantifying resilience gains over scalar loops. Future work will expand frequency band support, refine sensor fusion weights, integrate map-aided context awareness and ML-based detectors, optimise protection level timing, and explore applications in automotive, drones, maritime and defence sectors. 

This project was supported by NAVISP Element 1. The slides of the final presentation are available here.