How to remove noise from the signal analyzed by fft
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i analyzed tide signal want find to the actual frequency but fft product many noise
i want remove it
matlab have which code can remove noise
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Star Strider
2022 年 4 月 9 日
Probably the easiest way to deal with a noisy signal (considering that the nature of the noise is not stated here) is to use the Signal Processing Toolbox sgolayfilt function. I usually choose a 3-degree polynomial, and then adjust the window length until I get the result that I want.
Take the fft of the smoothed signal to determine the frequency. It will have the same length and sampling frequency of the original data.
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