Generating Micro Doppler Plots

[daniel-merrick]

Hey all -

I'm just looking for some clarification on how exactly you create a micro doppler plot, particularly when there are multiple targets in scene?

I assume it's something like the following?

1. Create Range-Doppler Maps
2. Do detection, tracking, etc
3. Extract 'blobs' from Range-Doppler Maps (let's imagine there is only one) based on tracking results
4. For the one blob, average across the range bins that land in the blob
5. Stack the vector of N samples vertically, that's your first time sample of your micro doppler spectrogram for that blob?

I'm particularly hesitant on the 4. Is this correct, you simply average across the range bins for all bins the blob lands in?

I've read that there should be a STFT somewhere, but not sure where? Are you suppose to take the STFT across each rows in the spectrogram after stacking some amount of them?

Any advice / input would be greatly appreciated.

Thanks!