Hello,
Could anybody please explain how to correct use FFT with two signals analysis? or give me some example?
What I want is to calculate these characteristics of two signals: coherence, cross spectrum, and phase. I will do measurement on a construction with several accelerometers to measure vibrations. I think it should be done with this type of analysis. I don't understand why the coherence is always 1. I've read the document FFT use in diadem but this type of analyse is not clear for me.
Thanks for help
Best regards
Michal.