selfcorr.m

本程序实现随机数的产生和在相同调制方式下功率谱比较

%－－求第一组序列的自相关函数
m=zeros(1,200);
for i=0:199
    s=1;
    l=zeros(1,200);
    for j=i+1:200
        l(1,s)=a(1,j);
        s=s+1;
    end
    m(1,i+1)=a*rot90(l,-1);        %－－求步长为i自相关函数值
end


%－－求第二组序列的自相关函数
m1=zeros(1,200);
for i=0:199
    s1=1;
    l1=zeros(1,200);
    for j=i+1:200
        l1(1,s1)=a1(1,j);
        s1=s1+1;
    end
    m1(1,i+1)=a1*rot90(l1,-1);      %－－求步长为i自相关函数值
end

%－－分别作两信号序列的自相关函数图
b=1:200;
figure(1)
subplot(211)
plot(b,m,'r');
grid on
title('selfcorr figure for data whose corcoef is 0.2')
subplot(212)
plot(b,m1,'r');
grid on
title('selfcorr figure for data whose corcoef is 0.8');