ToF - Time of Flight

Fraunhofer Institute for Integrated Circuits

ToF - Time of Flight

AoA

Time-of-flight (TOF) methods can provide positioning accuracy of less than a meter. If UWB technology is emloyed, transmission through obstacles such as walls is possible. These methods measure the time it takes for a signal to travel from source to receiver.

The signal can be timed in different ways. Round-trip-time (RTT) methods consider the time a signal takes to travel to its destination and back; time-difference-of-arrival (TDOA) systems use time differences between infrastructure components. To locate an object, up to 2000 extreme-precision measurements can be taken per second.
The resulting need for sophisticated infrastructure is compensated for by the fact that the tags used are small, robust and inexpensive.
RTLS (real-time locating systems) often use this technology for fast, highly accurate results.