|Feb22-12, 09:57 PM||#1|
Hanning window of MATLAB
As far as I know Hanning window is defined as the following:
.5+.5*cos(2*pi*n/N) and n is between [-(N-1)/2,(N-1)/2] here N is odd number.
MATLAB functions "hanning" with symetric or periodic options or "hann" do not match with the results of the above formula. There is always a slight annoying difference !
Do you know the problem?
(Same thing for Hamming window)
|Feb22-12, 11:50 PM||#2|
I used both in my DSP course without a problem. Maybe this will help:
|Feb23-12, 11:27 AM||#3|
As I understand the book is wrong (Notes On Digital Signal Processing by C. Britton Rorabaugh). If I replace the N by (N-1) in the denumerator of the formulation which is 5+.5*cos(2*pi*n/(N-1)), the results coincide exactly with that of MATLAB.
Thank you for the link.
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