生成m序列与gold序列

、生成m 序列

function [mseq] = m_sequence(fbconnection); n = length(fbconnection);

N = 25-1;

register = [zeros(1,n - 1) 1]; mseq(1)= register(n);

for i = 2:N

%n序列的长度

%定义移位寄存器的初始状态%m?列的第一个输出码元

newregister(1)= mod(sum(fbconnection.*register),2);

馈的模2和

for j = 2:n,

newregister(j)= register(j-1);

end ;

%寄存器与反

register = newregister;

mseq(i) = register(n); end %移位后的寄存器%新的寄存器输出

clear all

close all

clc;

fbconnection=[0 0 1 0 1]; %输入本原多项式系数，从C1 开始m_sequence=m_sequence(fbconnection);

stem(m_seque nee); %对m序歹U绘图

axis([0 35 -0.2 1.2]);

grid on;

二、生成gold序列

function goldseq = g_seque nce(c onnection 1,c onnection 2);

msequencel = m_sequence(connection 1); %生成第一个m序歹U

msequence2 = m_sequence(connection2); %生成第二个m序歹U

N=2A length(connection1)-1; %gold 序列长度

for i = 1:N;

s = mod(msequencel+msequence2,2); %两个m序歹U模二加产生gold 序歹U goldseq = s;

end

clear all ;

close all ;

clc;

connection1=[0 0 0 0 1 1];

conn ectio n2=[1 0 0 1 1 1];

goldseq = g_seque nce(c onnection 1,c onnection 2);

stem(goldseq);

axis([0 65 -0.2 1.2]);

grid on;

Fig u re 1 n