pwelch using hanning window of 1 sec and 50% overlap

Hello,

Can someone please help me to fast Fourier transform (FFT) a signal to be computed with a 1-second Hanning window and the window was shifted with 50% overlap and then calculate the median of the spectra of all sliding windows.

My sampling freq is 24KHz.

Thank you in advance

Answer 1

[Kevin]

Hi Shree,

To apply Hanning window and FFT,

X = fft(x .* hanning(24e3));

Here x = column vector of 24e3 samples (hence 1 second).

Then move x to next block with 50% overlap, then do the above line of code again.

After getting all X's, then you can do median.

Yes, there is some code you need to write but hopefully it is not too complicated.

Kevin

[siri meka]

Thank you for this. ill write the next part