FFT with window and overlap and Fs

Question

Dhiren 2023-8-29

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https://ww2.mathworks.cn/matlabcentral/answers/2014641-fft-with-window-and-overlap-and-fs

回答： Walter Roberson 2023-8-29

[txy,f] = tfestimate(x,y,window,noverlap,f,fs)

I want FFT to convert a time series data to frequency domain. I would also want to use these arguments such as hann window, overlap and nfft and fs. Please help me with correct syntax for the same. Thank you.

Y = fft(X,n) % does not include hann window, overlap and fs

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Answer 1

Walter Roberson 2023-8-29

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https://ww2.mathworks.cn/matlabcentral/answers/2014641-fft-with-window-and-overlap-and-fs#answer_1296471

Any time you talk about windows and overlap, you are no longer talking about FFT. FFT is a particular class of methods of implementing a discrete fourier transform (DFT) and DFT always work on all of the data.

You should instead look at functions such as spectrogram