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Computing spectrogram using STFT

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Ritesh Chandra Tewari
评论： Star Strider 2021-4-24
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.

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回答（1 个）

Star Strider
Star Strider 2021-4-24
Use the pspectrum function with the 'spectrogram' option.
  2 个评论
Ritesh Chandra Tewari
Ritesh Chandra Tewari 2021-4-24
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 2021-4-24
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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