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What is the relation of amplitude returned by harminv() to abs(fft(voltage)) ?

Posted: Mon 10 Feb 2020, 07:55
by Hale_812
It appears, harminv is binary compiled, which makes sense when talking about performance.
But I could not get a relation of harminv amplitudes to corresponding components of FFT from voltage.
How can I bring one o another in order to pinpoint the resonant peaks on the spectrum?

Re: What is the relation of amplitude returned by harminv() to abs(fft(voltage)) ?

Posted: Tue 25 Feb 2020, 07:01
by Hale_812
up

Re: What is the relation of amplitude returned by harminv() to abs(fft(voltage)) ?

Posted: Wed 26 Feb 2020, 23:39
by thorsten
Did you have a look at the corresponding harminv.m file that you should use? I personally have never used harminv and thus if the matlab file does not help you will have to refer to the harminv documentation.

regards
Thorsten

Re: What is the relation of amplitude returned by harminv() to abs(fft(voltage)) ?

Posted: Mon 02 Mar 2020, 05:59
by Hale_812
As I mentioned it, yes. And I did not find anything useful there; it just calls the binary program, and I don't know what's inside.

Harminv does not have any user-oriented documentation, except a basic explanation that it is cooler than FFT. Actually, I could not find technical documentation either.