Time Difference of Arrival (TDOA)
Time Difference of Arrival (TDOA) is a technique for geo-locating RF sources. It requires three or more remote receivers (probes) capable of detecting the signal of interest. Each probe is synchronized in time to capture corresponding I/Q data blocks. Software shifts the time signature of each I/Q data set to find the difference in the arrival time at each probe.
Anritsu provides TDOA measurements with MS2710xA Remote Spectrum Monitors (RSM) and the Vision™ software suite. The RSM probes have the necessary I/Q capture and precision timing features necessary to collect and transmit the timestamped I/Q data used in TDOA measurements.
This application note provides the essential factors to successfully use TDOA and more:
- General Overview of a TDOA measurement
- Type of Signals that can be Used
- How the Results Depend on the Geometry of the Measurement
- What the Sources of Uncertainty
- How to Mitigate the Sources of Uncertainty
- How to know if the Answer is Meaningful