pn.m

来自「一个用matlab写的跳频通信系统仿真」· M 代码 · 共 31 行

echo on
connections1=[1 0 1 0 0];
connections2=[1 1 1 0 1];
sequence1=mlsrs(connections1);
sequence2=mlsrs(connections2);
L=2^length(connections1)-1;
for shift_amount=0:L-1,
    temp=[sequence2(shift_amount+1:L) sequence2(1:shift_amount)];
    gold_seq(shift_amount+1,:)=(sequence1+temp)-floor((sequence1+temp)./2).*2
    echo off
end
t=1:L-1;
stem(t,gold_seq(t));
echo on;
max_cross_corr=0;
for i=1:L-1,
    for j=i+1:L,
        c1=2*gold_seq(i,:)-1;
        c2=2*gold_seq(j,:)-1;
        for m=0:L-1,
            shifted_c2=[c2(m+1:L) c2(1:m)];
            corr=abs(sum(c1.*shifted_c2));
            if (corr>max_cross_corr),
                max_cross_corr=corr;
            end;
            echo off;
        end;
    end;
end;