Howtosignalprocessing
TDoA is a positioning methodology that determines the difference between the time-of-arrival (ToA) of radio signals. TDoA is used in a real-time location system (RTLS) to accurately calculate the location of tracked entities, such as tracking tags affixed to personnel or key assets, in real time.
How is TDOA calculated?
TDOA Calculation
In the first method, each receiver measures the absolute time instant of signal arrival (time-of-arrival or TOA) as defined by t i above. A difference in time-of-arrivals between two receivers is then calculated to obtain the TDOA measurement.
How accurate is TDOA?
The short answer. TDOA geolocation results can give locations with as little as ten meters of uncertainty. Unlike other geolocation techniques, TDOA can provide accurate geolocation even for signals with power levels below the noise floor.
What is TDOA localization?
The key concept of TDOA-based localization technique is to determine the location of the source by evaluating the difference in arrival time of the signal at spatially separated base stations.
Does GPS use TOA or TDOA?
Navigation systems such as GPS and LORAN [1] use time of arrival (TOA) measurements of radio signals or differences in time of arrival (TDOA) measurements to determine a navigation position.
