Example 2 on circular convolution in MATLAB

CODE:

x1_n=[1 2 3 1];
x2_n=[4 3 2 2];
N=4;
X1_K=fft(x1_n,N);
X2_K=fft(x2_n,N);
X3_K=X1_K.*X2_K;
x3_n=ifft(X3_K)

Output:
x3_n =

17 19 22 19

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