Hi Rohan ,
I understand that you are trying to implement the circular convolution programmatically in MATLAB and should be able to do modify the logic as well
To do that , you can use the linear convolution and implement a circular convolution from there manually using the theoretical definition of circular convolution.
Refer to the below code snippet for better understanding of the logic .
x1=[1 3 2 -1]; %assumption of x1
x2=[2 1 0 -1]; %assumption of x2
x3=conv(x1,x2); %convolution
stem(x3,'r','filled');
title('Linear Convolution of x_1 and x_2')
xlabel('n')
ylabel('x_3')
x1=[x1 0] ;%padded 0 to make length of sequence 5
x2=[x2 0]; %padded 0 to make length of sequence 5
x3=conv(x1,x2); %convolution of x1(n) and x2(n)
x4=zeros(1,5); %x4(n) of length 5
for i=1:length(x4)-1
x4(i)=x3(i) + x3(i+length(x4)); %x4(n) using linear convolution x3(n)
end
x4(end)=x3(length(x4));
stem(x4,'filled','g');
title('Circular convolution manually using Linear convolution');
xlabel('n');
ylabel('x_4')
Also refer to the below documentation for details .
