Howtosignalprocessing
- What is TDOA localization?
- How does time difference of arrival work?
- How is TDOA calculated?
- Is TDOA geolocation accurate?
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.
How does time difference of arrival work?
The result of a TDOA measurement is a time difference in the arrival of the signal of interest at two or more probes. The time difference is multiplied by the speed of light to give a difference in distance between each set of probes and the RF source.
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.
Is TDOA geolocation accurate?
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.
