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How to smooth signal and find dominant freqeuncy using FFT?

조회 수: 3 (최근 30일)
Steven
Steven 2015년 9월 24일
답변: Samudrala Jagadish 2015년 9월 27일
Hi. I am not so familiar with signal processing. I have this oscillation which I like to find its dominant frequency. I used FFT, but it does not give me any specific value.
After all, can we define any frequency for this kind of oscillations? How can I smooth the data? I used filter and sgolayfilt, but they didn;t change the data at all.
Thanks in advance!
Steven

답변 (1개)

Samudrala Jagadish
Samudrala Jagadish 2015년 9월 27일
If you want to smooth the given signal without using FFT Filtering, they you may use a concept called "Moving Average Filter" Please follow my file exchange link as given below it contains a code to smooth a signal upto some extent
here is the link:

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