Abstract
The ultra-wide band radio technology (UWB) is currently considered the
de-facto standard for implementing precise indoor positioning systems.
Several positioning algorithms are currently being investigated for
finding the best implementation in terms of scalability, refresh rate,
and energy requirements. Among all the proposed approaches, the Downlink
Time Difference of Arrival (DTDoA) is currently considered one of the
most promising techniques capable of tracking any number of assets
without decreasing the measurement update rate. This paper proposes a
model for the DTDoA and validates the algorithms on UWB data, using a
motion capture system as ground truth. Results highlight the validity of
the previously proposed model, showing that the proposed UWB indoor
positioning system achieves a maximum 30 cm uncertainty with only a
simple wireless synchronisation, avoiding wired procedure that limits
the usability of the infrastructure.