Computing spectrogram using STFT

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Ritesh Chandra Tewari
Ritesh Chandra Tewari on 24 Apr 2021
Commented: Star Strider on 24 Apr 2021
I have Radar motion data. There are two columns time and amplitude. Can someone help, how to find spectrogram of raw signal using STFT. For the reference I am uploading a sample image, what I exactly need.

Answers (1)

Star Strider
Star Strider on 24 Apr 2021
Use the pspectrum function with the 'spectrogram' option.
  2 Comments
Ritesh Chandra Tewari
Ritesh Chandra Tewari on 24 Apr 2021
can you please help me with code. Let x be the data matrix containing two columns, 1st column represents time and 2nd column represents amplitude of the radar signal.
Star Strider
Star Strider on 24 Apr 2021
The documentation explains it better than I can.
Prototype code would be:
pspectrum(2nd_column, 1st_column, 'spectrogram')
or:
[p,f,t] = pspectrum(2nd_column, 1st_column, 'spectrogram');
Beyond that, you will have to experiment with your data to get the result you want. See the documentation for details.

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