Signal Phase using FFT

4 vues (au cours des 30 derniers jours)
Fed
Fed le 19 Mar 2018
Modifié(e) : Fed le 4 Avr 2018
I have two cerebral signals registered for 10 minutes with a sample rate of 1000Hz. I have to extract the phase of the signals and the average phase displacement using FFT. The signals are represented by a 2x10000 matrix in MATLAB. How can I do that? Thank you in advance

Connectez-vous pour répondre à cette question.

Réponse acceptée

Shounak Shastri
Shounak Shastri le 19 Mar 2018
"I have to extract the phase of the signals and the average phase displacement using FFT"
Use the "fft" and the "fftshift" functions. The phase can be calculated by using the function 'angle' which will give you the phase and then unwrapping it by using the unwrap function. You can search the documentation for the explaination.
Here is an example in the matlab documentation https://in.mathworks.com/help/matlab/examples/fft-for-spectral-analysis.html
  3 commentaires
Afficher 1 commentaire plus ancien
Shounak Shastri
Shounak Shastri le 21 Mar 2018
You are welcome.
Fed
Fed le 4 Avr 2018
Modifié(e) : Fed le 4 Avr 2018
Now that I have calculated the phase using the functions “angle” and “unwrap”, I have to represent the phase of my signals in a polar plot as shown in the figure above. My signals are both 1x10000. I don’t know what to put as arguments of the “polarplot” or “polarscatter” command. How can I do that? Thank you in advance!

Connectez-vous pour commenter.

Plus de réponses (0)

Catégories

En savoir plus sur Spectral Measurements dans Help Center et File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by