
#1
Feb2212, 09:57 PM

P: 18

Hi all
As far as I know Hanning window is defined as the following: .5+.5*cos(2*pi*n/N) and n is between [(N1)/2,(N1)/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) 



#2
Feb2212, 11:50 PM

PF Gold
P: 4,195

I used both in my DSP course without a problem. Maybe this will help:
http://www.mathworks.com/help/toolbo.../ref/hann.html 



#3
Feb2312, 11:27 AM

P: 18

As I understand the book is wrong (Notes On Digital Signal Processing by C. Britton Rorabaugh). If I replace the N by (N1) in the denumerator of the formulation which is 5+.5*cos(2*pi*n/(N1)), the results coincide exactly with that of MATLAB.
Thank you for the link. 


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