%diff_enc(input); function to differentially encode a bit stream vector%function output = diff_enc(input)
L_in = length(input);
output = [];
for k = 1:L_in
   if k == 1
      output(k) = not(bitxor(input(k),1));
   else
      output(k) = not(bitxor(input(k),output(k-1)));
   end
end