Power of sine wave plot
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Namira
on 25 May 2018
Commented: Rishabh Rathore
on 28 May 2018
I have a power spectrum for my model. I would like to add sine wave as a drive with power spectrum. I don't know how to calculate the power of sine wave? Can I add the sine wave with power? Can anyone help me, please?
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Rishabh Rathore
on 28 May 2018
Edited: Rishabh Rathore
on 28 May 2018
Here's what I understand from your question, you want to know how to calculate 'Power' of sine wave and plot it over Power Spectrum of your model.
Power of the sine wave A*sin(x), is (A^2)/2, but only when A is constant. If the amplitude is varying, then integrate the wave over one time period and divide it by the time period to get the power.
You can then use this to add/plot the corresponding value on the Power spectrum of your model.
To plot the power of Sine wave over the existing plot, use hold on and hold of.
4 Comments
Rishabh Rathore
on 28 May 2018
it is because of the line
psdx = (1/(Fs*N)) * abs(xdft).^2;
The absolute value is squared.
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