How to apply windowing technique in frequency Domine using Convolution Technique
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Hello
Sample Rate: 500 Hz, L = 4500(Total Block Size)
%I applied a windowing technique with following command
wd = window(@tukeywin,L,1/1.7);
New_Signal = Time_Domine_Data * wd; %(Scalar Multiplication)
Freq = fft(New_Signal);
Multiplication in time domine is convolution in frequency domine, How do I apply windowing object 'wd' in frequency Domine using Convolution Technique
-- Thanks
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Wayne King
2013-3-30
Like this:
x = randn(8,1);
win = hamming(8);
y = x.*win;
ydft = fft(y);
Now compare ydft to the following:
N = length(x);
xdft = fft(x);
windft = fft(win);
1/N*cconv(xdft,windft,N)
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