Frequency ambiguity resolution

Radar pulsing causes a phenomenon called aliasing, which occurs when the Doppler frequency created by reflector motion exceeds the pulse repetition frequency (PRF).

Doppler frequency shift is introduced onto reflected signals used by radar.

This introduces a modulo operation onto the apparent frequency of the reflected signal.

The true speed of the target may be folded by a modulo operation produced by the sampling process.

This frequency ambiguity resolution signal processing technique determines true velocity.