Speed up nested for loops

I am trying to speed up the code below. Are there any suggestions on how I could make it faster? Thanks!

%A=ones(192,64);  %example matrix 
%B=ones(192,64);  %example matrix

Bpad=padarray(B,[11 11],0,'both');
c=zeros(1,529);
jcount=1;
for i=-11:11
    for j=-11:11  
        c(jcount)=sum(sum(A.*conj(Bpad(12+i:end-11+i,12+j:end-11+j))));
        jcount=jcount+1;
    end
end

Answer 1

[Andrei Bobrov]

c0 = conv2(B,A);
c = reshape(c0(2:end-1,2:end-1)',1,[]);

OR

c0 = conv2(Bpad,A,'valid');
c = reshape(c0',1,[]);