ser_to_par.m

使用matlab程序实现了由随机序列到码元电平、m序列直接扩频解扩、qpsk调制解调

function [x1 ij1_uni qj1_uni]=ser_to_par(ij1,qj1)
N=20;                                  %随机数点数20
td=0.1;
f0=3000;
wc=2e4*pi;
g=100;  

ij1_uni=bi_to_uni(ij1);             %I路解扩结果变单极性         
qj1_uni=bi_to_uni(qj1);             %Q路解扩结果变单极性  
ij1_qj1=[ij1_uni;qj1_uni];
x1=reshape(ij1_qj1,1,N);            %串并转换
figure(8);
subplot(311);
stem(x1,'LineWidth',1.5);
grid on;
subplot(312);
stem(ij1_uni,'LineWidth',1.5);
grid on;
subplot(313);
stem(qj1_uni,'LineWidth',1.5);
grid on;