cc12.m

ldpc码中

function c12=cc12(H)
%c12=cc12(H)
%如果包含有12环，则c12=1，否则c12=0

dim=size(H);
cols=dim(2);

h1idx=zeros(6, cols);

%计算列重
for j=1:cols
   ind=find(H(:,j)==1);
   h1idx(1,j)=length(ind);
   h1idx(2:h1idx(1,j)+1,j)=ind;
end

c12=checkcycle12(h1idx);