% a function to encode the input sequence
% organize according to the encoding circuit
function t_x=rs_encode(m_x)
r=zeros(1,7);
for i=1:25
    r(7)=rs_add(r(6),m_x(26-i));
    r(6)=rs_add(r(5),rs_mul(r(7),17));
    r(5)=rs_add(r(4),rs_mul(r(7),26));
    r(4)=rs_add(r(3),rs_mul(r(7),30));
    r(3)=rs_add(r(2),rs_mul(r(7),27));
    r(2)=rs_add(r(1),rs_mul(r(7),30));
    r(1)=rs_mul(r(7),24);
end
t_x=[r(1:6),m_x];