Howtosignalprocessing
- What is ambiguity function in radar?
- What causes range ambiguity?
- How does a pulse Doppler radar work?
What is ambiguity function in radar?
The radar ambiguity function is defined as the absolute value of the envelope of the output of a matched filter when the input to the filter is a Doppler-shifted version of the original signal, to which the filter was matched. Ambiguity functions are usually analyzed on a single pulse basis.
What causes range ambiguity?
In Synthetic Aperture Radar (SAR) imaging, range ambiguity is caused by the echoes of the previous and latter transmitted pulses scattered from undesired range zones [1].
How does a pulse Doppler radar work?
Doppler radar
By measuring the shift (or change) in phase between a transmitted pulse and a received echo, the target's movement directly toward or away from the radar is calculated. This then provides a velocity along the direction the radar is pointing, called radial velocity.
