fanjiaozhi.m

在MATLAB环境下的GSM信道编码,非常 不错

function d=fanjiaozhi(u)
s=size(u);
N=s(2)/456-1;
newD=zeros(456*N+8,57);
u=reshape(u,114,4*(N+1));
u=u';
for n=0:N-1           %反交织
    for i=1:4
        newD(8*n+i,:)=u(4*n+i,1:2:113);
        newD(8*n+i+4,:)=u(4*n+i+4,2:2:114);
    end
end

for n=0:N-1      %去重排
   for x=1:8
       for y=1:57
         coef=mod(57*(x-1)+64*(y-1)+1,456);
           if coef==0
              coef=456;
           end
         d(456*n+coef)=newD(8*n+x,y);
       end       
    end
end