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+//Example 8.27

+//Find the circular convolution of the following sequences

+clc;

+clear all;

+x1=[1 -1 2 3];

+x2=[0 1 2 3];

+X1=fft(x1,-1);//To obtain fourier transform of x1, -1 is taken.

+X2=fft(x2,-1);

+X3=X1.*X2;

+x3=fft(X3,1);//+1 to obtain inverse fourier transform.

+disp(x3,'Circular convolution of the above two sequences is:');