NAVISP EL1-056 bis: "Advanced Algorithms and Techniques for Resilient Time Provision"

Last Updated: 12/05/2025 06:44     Created at: 07/05/2025 12:33

On May 7th, 2025, Huld s.r.o. and the University of West Bohemia in Pilsen presented the results of the NAVISP EL1-056bis project, focused on developing advanced algorithms for resilient time provision. The project developed an accurate, stable, and fault-tolerant timing provision system by combining multiple timing sources and detecting inconsistencies among inputs.

Key achievements that were presented during the presentation are:

• System Design: Developed a system that combines clock signals using multiple Kalman Filters. This provides better frequency stability and fault detection.
• Measurement Techniques: Implemented advanced methods such as Dual Mixer Time Difference (DMTD) and Time-to-Digital Conversion (TDC) to achieve high precision with resolutions down to 0.1 ps.
• Hardware and Software: Designed a high-performance hardware platform utilizing ADCs, FPGAs, and Zynq UltraScale+ chips, with software for real-time visualization.
• Verification: Successfully tested the system at ESA's UTC lab in Noordwijk ESTEC, demonstrating high precision in time measurement, fault detection, and clock synchronization under various conditions.

Future work will focus on refining the fault detection algorithms and improving the PPS subsystem for more robust and reliable time provision across critical infrastructures. The current hardware will also be further iterated into fully integrated circuits.

The slides are accessible here