Hi,
I have a signal in time that I want to analize in the frequency domain using wavelet transform (to balance time and frequency resolution). When I check the magnitude scalogram that is automatically generated using the function cwt, the value of the magnitude that i read is somehow corresponding to the value I am expecting from the time signal. When I try to extract this values computing abs and angle of the coefficients I get from cwt and compare them with expected magnitude and phase, I see there is some scaling factor. I tried to play with the sampling frequency, and it seems to be dependent also on this, but I could not figure out looking into the documentation how to get rid of this scaling factor.
coefs = cwt(signal, scales, wavelet);
mag=abs(coefs);
ph=angle(coefs);
I am taking the magnitude and phase at the freqeuncy where I have the peak, of course, using max(). That’s the one I want to extract.Hi,
I have a signal in time that I want to analize in the frequency domain using wavelet transform (to balance time and frequency resolution). When I check the magnitude scalogram that is automatically generated using the function cwt, the value of the magnitude that i read is somehow corresponding to the value I am expecting from the time signal. When I try to extract this values computing abs and angle of the coefficients I get from cwt and compare them with expected magnitude and phase, I see there is some scaling factor. I tried to play with the sampling frequency, and it seems to be dependent also on this, but I could not figure out looking into the documentation how to get rid of this scaling factor.
coefs = cwt(signal, scales, wavelet);
mag=abs(coefs);
ph=angle(coefs);
I am taking the magnitude and phase at the freqeuncy where I have the peak, of course, using max(). That’s the one I want to extract. Hi,
I have a signal in time that I want to analize in the frequency domain using wavelet transform (to balance time and frequency resolution). When I check the magnitude scalogram that is automatically generated using the function cwt, the value of the magnitude that i read is somehow corresponding to the value I am expecting from the time signal. When I try to extract this values computing abs and angle of the coefficients I get from cwt and compare them with expected magnitude and phase, I see there is some scaling factor. I tried to play with the sampling frequency, and it seems to be dependent also on this, but I could not figure out looking into the documentation how to get rid of this scaling factor.
coefs = cwt(signal, scales, wavelet);
mag=abs(coefs);
ph=angle(coefs);
I am taking the magnitude and phase at the freqeuncy where I have the peak, of course, using max(). That’s the one I want to extract. wavelet transform, cwt, magnitude, phase, signal in time domain MATLAB Answers — New Questions

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