descramble.asv

利用MATLAB工具,实现维特比译码的仿真,一个比较简单的做法

function descrambled_bits=rx_descramble(in_bits)
in_bits=[0 0 1 0 1 1 1 0];
descrampoly=[1 1 1 1 1 1 1];
    descrambler=zeros(1,127);
    for i=1:127
        a=rem(descrampoly(4)+descrampoly(7),2);
        for jj=7:-1:2
            descrampoly(jj)=descrampoly(j-1);
        end
        descrampoly(1)=a;
        descrambler(ii)=a;
    end
        in_bits1=[in_bits,zeros(1,127-length(in_bits))];
        descrambled_bits=rem(descrambler+in_bits1,2);