Resilient time synchronization opportunistically exploiting UWB RTLS infrastructure

Ultra Wide Band (UWB) based solutions for real time localization are starting to be widely diffused. They use two-way ranging scheme achieving indoor positioning accuracy well below ten centimeters. These wireless devices are based on counters with picosecond resolution, which could be used also for nodes time synchronization. This work aims to propose an opportunistic approach for transparently obtaining multiple accurate time synchronization from low-cost infrastructure of Real Time Location Systems (RTLS). After the description of the proposed approach, the idea is demonstrated using off-the-shelf Ultra Wide Band (UWB) modules from Decawave and their related software. Thanks to hardware timestamping support inside the core architecture, the realized wireless station is able to simultaneously lock and track several time references generated by the UWB module. The extensive experimental characterization evaluates both the uncertainty of the reference signal generated by the UWB receiver, and the time synchronization uncertainty of the whole host system running a Proportional Integrative (PI) control loop for locking the master reference clock. The time reference pulses are delivered by the UWB modules with a maximum jitter on the order of 40 ns, whereas the synchronization uncertainty is less than 10 ns. IEEE

TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Signalbehandling hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Signal Processing hsv//eng
Clocks
Decawave
Distance measurement
Location awareness
Real-Time Location System
Standards
Synchronization
Time synchronization
Ultra Wide Band
Wireless communication
Wireless Sensor Network
Wireless sensor networks
Computer architecture
Location
Locks (fasteners)
Network architecture
Real time systems
Signal receivers
Ultra-wideband (UWB)
Band modules
Real time location systems
Real-time localization
Synchronization uncertainties
System infrastructure
Two-way ranging
Wireless communications

Ingår i:IEEE Transactions on Instrumentation and Measurement: Institute of Electrical and Electronics Engineers Inc.71, s. 1-100018-94561557-9662

Av författaren/redakt...: Ferrari, P.; Bellagente, P.; Depari, A.; Flammini, A.; Pasetti, M.; Rinaldi, S.; visa fler...; Sisinni, E.; visa färre...

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TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Elektroteknik oc ...; och Signalbehandling

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