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Finding frequency in simulink

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Marek Andrzej
Marek Andrzej 2016-10-24
编辑： Marek Andrzej 2016-10-24
I have a signal after lowpassing and I am looking for its frequency. I thought I could use fft but:
the buffer is set to 2048
  • for some reason after Abs it's still negative, and its hard to determine frequency because of shape
  • How do I get rid of the value in 0?
  • How to determine the middle of the frequency "mountain"
Any other method of finding freq would be highly appreciated

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