MATLAB: Hanning ,hamming window in matlab

digital signal processingMATLAB

how do Hanning and Hamming window in matlab?
when must I do these window after DFT signal or before DFT signal?

Best Answer

Before you take the DFT
hamming() or hann()
t = 0:0.001:1-0.00;
 x = cos(2*pi*100*t)+randn(size(t));
 winvec = hamming(length(x)); % hann(length(x));
 xdft = fft(x'.*winvec);
 plot(abs(xdft))
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