counter_weave_4.m

GSM信道编码设计

%交织度为4的反交织
function d=COUNTER_WEAVE_4(u)
c=zeros(8,57);
u=(reshape(u,114,4))';
for i=1:4
   c(i,:)=u(i,1:2:114);
   c(i+4,:)=u(i,2:2:114);
end
for i=0:7
   for j=0:56
      a=mod(57*i+64*j,456);
      d(a+1)=c(i+1,j+1);
   end
end