Finding frequency in simulink

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Marek Andrzej 2016 年 10 月 24 日

編集済み: Marek Andrzej 2016 年 10 月 24 日

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

MATLAB Mathematics Fourier Analysis and Filtering

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