What is frequency-domain entropy in FFT result and how to calculate it?
I am a programmer but quit bad on math.. I recently read an article which mentioned frequency-domain entropy,he calculated that thing from a FFT power spectrum but didn't tell me how to do that. I cannot find enough information online to understand what it is . I'm appreciate for any helps..
Here is part of article:
Solution
Frequency domain entropy, also known as a (Power) Spectral Entropy calculation is done in following steps:
Calculate the FFT of your signal.
Calculate the PSD of your signal by simply squaring the amplitude spectrum and scaling it by number of frequency bins.
- Normalize the calculated PSD by dividing it by a total sum.
- Calculate the Power Spectral Entropy using a standard formula for entropy calculation:
Reference is here.
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