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//Caption: Circular Convolution expressed as linear convolution plus alias
//Example3.13
//page 123
clc;
x = [1,2;3,4];
h = [5,6;7,8];
y = conv2d(x,h);
y1 = [y(:,1)+y(:,$),y(:,2)];
y2 = [y1(1,:)+y1($,:);y1(2,:)]
disp(y,'Linear Convolution result y=')
disp(y2,'circular convolution expessed as linear convolution plus alias =')
//Result
// Linear Convolution result y=
//
// 5. 16. 12.
// 22. 60. 40.
// 21. 52. 32.
//
// circular convolution expessed as linear convolution plus alias =
//
// 70. 68.
// 62. 60.
//
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