cama.m

详细说明了c码的产生

%C码产生
clear;
g1=ones(1,10);     %移位寄存器G1初始状态
g2=ones(1,10);     %移位寄存器G2初始状态
ca=ones(1,1023);   %C/A码向量
for n=1:1023
    g21=xor(g2(2),g2(6));
    ca(n)=xor(g1(10),g21);
    if ca(n)==0
        ca(n)=-1;    %将单极性码变为双极性码，以直接与载波相乘
    end
    g1t=xor(g1(3),g1(10));
    g2t=xor(g2(2),g2(3));
    g2t=xor(g2t,g2(6));
    g2t=xor(g2t,g2(8));
    g2t=xor(g2t,g2(9));
    g2t=xor(g2t,g2(10));
    for i=9:-1:1
        g1(i+1)=g1(i);
        g2(i+1)=g2(i);
    end
    g1(1)=g1t;g2(1)=g2t;
end