Using Wavelet Toolbox to measure the occupied bandwidth of a non stationary signal

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yousef Yousef 2023-2-28

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评论： Ken 2023-4-4

Hi

Is it possible to use the Wavelet Toolbox to measure the occupied bandwidth ( corresponds to 0.99% of signal power ) of a non stationary signal ?

Thank you

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Answer 1

Samyuktha 2023-4-4

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Hi Yousef,

I understand that you want to measure the occupied bandwidth of a non-stationary signal. You can use the 'stft()' and 'spectrogram()' to do so. More information about the commands can be found in the following documentation links.

stft() and spectrogram()

Hope it helps!

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Ken 2023-4-4

Thank you, Samyuktha, for your answer. I'm already using stft() and spectogram() in analyzing nonstationary signals. However (as far as I know ), these functions can only analyze the spectrum of the signals. But they do not give the occupied bandwidth as a measured or calculated value. More than that, these functions are FT based, while FT is not the best suit for nonstationary signals. STFT and Spectrogram are fixed-length windowing which is not compatible with nonstationary signals where different resolutions at different frequencies are required.

Looking forward to hearing back from you

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