noise cancellation methods

[Eng P&D]

someone have an ideia how can I try to implement this type of methods to cancel background noise when make spectrum analysis?

I have used the differentiate curve, the mathematics form of subtrate 2 noise levels but it's not the right way I would like.

[unclebump]

Do you have the signal processing toolkit?? There is a denoise vi in it. I could try it on some sample data.

[michenglaoxu]

Actually, noise analysis is not easy. For your application, first you need to decide your noise type, amplitude,...

Then, decide what filter to use. If the frequence of you noise is overlapped with your real signal, you got to find time domain

method to remove it.