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 Periodic signal: how to determine the frequency?

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T O P I C    R E V I E W
vlnew Posted - 12/02/2017 : 8:14:20 PM
OriginPro 2017 SR2 b9.4.2.380
Operating System: Win7

Hello!

I am analysing a periodic signal, which contains a periodic component, a trend component and noise component. I am only interested in the periodic component, and in particular, I am only interested in determining the period (1/frequency) of this signal. I tried FFT and autocorrelation, but did not succeed. What is the best way to solve this problem?

Thanks!
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cpyang Posted - 12/03/2017 : 9:54:19 PM
Can you give some details on how FFT didn't work for you? Maybe you can show some images?

Maybe you should subtract the trend component with a linear fit?


CP

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