Derivate a signal with staircase

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Stefano Massardi
Stefano Massardi 2021-2-9
评论： Stefano Massardi 2021-2-9
Hi everyone
I have a signal like this, the sampling rate is low then i get the signal with a staircase.
The problem is that i want to derive it. 2 times! If i derive this signal i get a very bad derivative of course, and more the 2nd derivative.
I tryed to make it smoother with a simple cubic spline but i always have a bad derivate signal.
Any idea on how to make it smooth and well derivable?
Thanks!!!

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回答（1 个）

Jan
Jan 2021-2-9
  1 个评论
Stefano Massardi
Stefano Massardi 2021-2-9
It gives me something like this. many samples are actually replicated in the horizontal part, i dont' know if this influences

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