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Is there any difference in calculation of Energy spectral density and Power spectral density using MATLAB?

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Power Spectral Density
PSD=PSD= real(Signal).^2 + imag(Signal).^2;
Where Signal =FFT output
How can I find Energy Spectral Density?

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Image Analyst
Image Analyst am 8 Feb. 2022
Wouldn't it just be the sqrt(psd)?
By the way, there is a function in the Signal Processing Toolbox to get the PSD:
PSD = pwelch(timeDomainSignal);

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