%tch/fs信道內解碼
function d=nei_yima(u)
G=[1 0 0 1 1;1 1 0 1 1];
k=1;
u1=[u(1:378),zeros(1,8)];
u2=u(379:456);

[decoder_output,survivor_state,cumulated_metric]=viterbi_decoder(G,k,u1);
d=[decoder_output,u2];