h2alpha.m

速度很快的低密度奇偶校验码的Matlab仿真程序

function alpha=H2alpha(Ha)

[M,N]=size(Ha);
Ha_tmp=zeros(M,N);
k=1;
for i=1:N
    for j=1:M
        if Ha(j,i)==1
            Ha_tmp(j,i)=k;
            k=k+1;
        end;
    end;
end;

alpha_length=k-1;
alpha=zeros(alpha_length,1);
k=1;
for i=1:M
   for j=1:N
        if Ha_tmp(i,j)~=0
            alpha(k)=Ha_tmp(i,j);
            k=k+1;
        end;
    end;
end;


%最大度数
maxVarNodeDegree=max(sum(Ha));
maxChkNodeDegree=max(sum(Ha'));

%行向量
VarNodeDegree=sum(Ha)';
CheckNodeDegree=sum(Ha')';