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

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