Hello,
i know this has been asked before, but i also saw that there was no good answer until now. The other threads tell me how fft works etc... but this vi does much more than calculation just fft and taking maximum bin......
I need this vi for my PhD, so i have to understand in detail how that vi works
🙂The Tone Measurement VI: (for frequency estimation):
- Calculates FFT
- Estimates peak region by selecting 3 dominant peaks by just comparing highest values of the bins itself
- Weights the 3 dominant bins ->
-> But how? I found several until now ununderstandable weighting calculations.
I am sure that the frequency this vi finds is not just the max-bin position. The frequency it delivers is inbetween the bin positions....
How is it weighted? Interpolation? Geometrical weighting? Averaging?
So please tell me this algorithm in detail.
yours
