Ambiguity resolution

Ambiguity resolution is used to find the value of a measurement that requires modulo sampling.

[1] Radar aliasing happens when: Pulse Doppler sonar uses similar principles to measure position and velocity involving liquids.

The received signals from multiple PRF are compared using the range ambiguity resolution process.

The received signals are also compared using the frequency ambiguity resolution process.

A blind velocity occurs when Doppler frequency falls close to the PRF.

This folds the return signal into the same filter as stationary clutter reflections.

Pulse-Doppler ambiguity zones. Each blue zone with no label represents a velocity/range combination that will be folded into the unambiguous zone. Areas outside the blue zones are blind ranges and blind velocities, which are filled in using multiple PRF and frequency agility.