How to estimate different FFT plots using Welch's method

Question

Tayyaba Bano 2022-6-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1733105-how-to-estimate-different-fft-plots-using-welch-s-method

回答： Star Strider 2022-6-3

test_case.fig

Hi,

I am having FFT values across different input signals values, My FFT for each signal contains noise and a lot of peaks. I want to estimate the FFT using Welch's method, how can I input my different FFT values to get the estimation?

I am attaching a FFT as an example. I have almost 10 signals of such type.

Thanks

Tayyaba

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Answer 1

Star Strider 2022-6-3

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https://ww2.mathworks.cn/matlabcentral/answers/1733105-how-to-estimate-different-fft-plots-using-welch-s-method#answer_977880

See the documentation on the pwelch function. Its inputs are time-domain vectors (or matrices in which each column of the matrix is a different time domain signal).