Howtosignalprocessing
Doppler tolerance defines the maximum available Doppler shift for given waveform such that you can still achieve correlation peak bigger than some threshold (SNR is assumed high enough to produce such a correlation). There is fundamental property of all waveforms used in Radar (and other apps): ambiguity function.
How can I improve the resolution of my Doppler?
Range resolution was obtained by using a short pulse and by frequency or phase modulating it in order to increase its frequency bandwidth. On the other hand, velocity (Doppler) resolution can be improved by increasing the time duration of the pulse.
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.
