Extract power by frequency bands from a signal using Continous Wavelet Transform for EEG Signals

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Juan Sanchez 2018 年 8 月 1 日

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https://jp.mathworks.com/matlabcentral/answers/413139-extract-power-by-frequency-bands-from-a-signal-using-continous-wavelet-transform-for-eeg-signals

編集済み: Juan Sanchez 2018 年 8 月 3 日

Hello Im currently working with EEG signals and I want to extract the Beta, Theta, alpha, delta and gamma power from the signal. Before anything I´m starting in this road of signal processing so Im new to all of this. Im using the cwt function with a morlet wavelet for a F3-A1 and F4-A1 channel during a task.

[wt,f,coil]=cwt(F3_A1,Fs,'amor');

The result gives the Magnitude Scalogram as expected with a better resolution than using a spectrogram (as expected) but I want to obtain the power for each band and Im not sure how to use the wt coefficients for this purpose since they contain real and imaginary values.

Could anyone help me with some advice on how to work with this subject. All help is much appreciated.

Thanks to everyone in advanced.