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+//Graphical//
+//Example 5.2.1 and Example 5.2.2
+//Performing Circular COnvolution
+//Using DFT
+clear;
+clc;
+close;
+L = 4; //Length of the Sequence
+N = 4;  // N -point DFT
+x1 = [2,1,2,1];
+x2 = [1,2,3,4];
+//Computing DFT 
+X1 = dft(x1,-1)
+X2 = dft(x2,-1)
+//Multiplication of 2 DFTs
+X3 = X1.*X2
+//Circular Convolution Result
+x3 =abs(dft(X3,1))