matlab - Not able to perform frequency domain windowing correctly? -


i trying perform frequency domain windowing convolving sinc signal (in blue color) impulse response of raise cosine window (1+0.5*cos()).

the convoluted output getting plotted in black color. but, want output should 1 plotted in red color.

i have attached code same below. highly appreciated.

n0=0;  w=0.5;  n=64;  ncap=5*n;  l=ncap/n;  n=(-ncap/2:(ncap/2)-1);  ws=n/ncap;  s=sinc(ws.*(n+n0));  test_fir=[0.5 0 0 0 0  1 0 0 0 0 0.5];  conv_out= (conv(test_fir,s)/max(conv(s,test_fir)));   figure(2)  plot(s,)  hold on  plot(conv_out,'k','linewidth',2)

for way proceed, result expected. you're plotting s (which has 320 doubles) along conv_out, has 330 elements (because convolution's result going have 1 less sum of number of elements per vectors convolve, i.e. 320 , 11).

since you're plotting both vectors against position of elements, quite normal conv_out shifted compared s (because have different lengths). need correctly choose x axis plotting. so, try figure correct x axis.


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