tiaopinma.m

跳频码性能分析

function cHanm=Hanm(A,C)
% AHanming is the auto correction of A
%tau is the delate time 
% 计算序列A和C的汉明互相关值，及平均值,延时为tau
A=[28 30 29 31 24 30 17 31 1 28 2 31 1 24 6 23 11 9 21 23 15 9 25 23 22 11 10 23 22 15 14 31]
C=[28 30 29 31 24 30 17 31 1 28 2 31 1 24 6 23 11 9 21 23 15 9 25 23 22 11 10 23 22 15 14 31]
Q=length(A);
B=zeros(Q,0);
Hanm=zeros(1,Q);
for tau=0:(Q-1)
    for N=1:Q
        if N>tau
            B(N)=C(N-tau);
        else
            B(N)=C(Q-tau+N);
        end
        B;                    %%输出的延迟时刻是tau的序列C
        if A(N)==B(N)
            Hanm(tau+1)= Hanm(tau+1)+1;
        end
    end
    tau;Hanm(tau+1);           %输出的延迟时刻是tau的序列的汉明相关值
end
Hanm ;                         
cHanm=mean(Hanm);                 %输出延迟时刻是tau的序列的汉明互相关值的平均值，tau=0,1,2,...,Q－1；
a=Hanm(1);
for i=1:(Q-1)
    Hanm(i)=Hanm(i+1);
end
Hanm(Q)=a;
xlabel('平移位数')，ylabel（'汉明相关')
plot(Hanm),axis([0,40,0,40])
title('correlation of NHZ code')