Cyclic convolution between two matrices in matlab How can I perform cyclic (periodic) convolution between two matrices in Matlab? And also, what would be the normalization term?
Assuming that cconv2 does not exist, you can do it with the Fourier transform and multiplication:

A = some_MxN_matrix;
B = some_KxP_matrix;
Mfft = max(M,K);
Nfft = max(N,P);
C = ifft2( fft2(A,Mfft,Nfft) .* fft2(B,Mfft,Nfft) );


Hopefully the above helps.