chap2_fig7_2.m

无线通讯系统的matlab仿真程序；主要包括同步

% Chap2_Fig7_2.m

clc
clear all
close all

t(1)=0;
yA1(1)=0;
yA2(1)=0;
zA1(1)=0;
zA2(1)=0;
tau=1;
T=0.05;

tf=5*tau;
nf=round(tf/T);
P=1;
for n=1:nf
    unT1=1;
    unT2=10;
    t(n+1)=n*T;
    yA1(n+1)=yA1(n)+(T/tau)*(unT1-yA1(n));
    yA2(n+1)=yA2(n)+(T/tau)*(unT2-yA2(n));
    zA1(n+1)=zA1(n)+(T/tau)*(unT1-zA1(n)*zA1(n));
    zA2(n+1)=zA2(n)+(T/tau)*(unT2-zA2(n)*zA2(n));
end % n
ms=5;    
freq=3;
ti=linspace(0,tf,500);

subplot(2,2,1)
plot(t(1:freq:end),yA1(1:freq:end),'.','MarkerSize',ms)
axis([0 5 0 1.1])
ylabel('\ity_A\rm(\itnT\rm)','FontSize',11)
text(1.8,0.4,'\itu\rm(\itt\rm) = 1','FontSize',11)
text(1.8,0.2,'\itT \rm= 0.05','FontSize',11)
text(0.2,1.2,'First Order Linear and Nonlinear System Model Step Responses','FontSize',11)

subplot(2,2,2)
plot(t(1:freq:end),zA1(1:freq:end),'.','MarkerSize',ms)
axis([0 3 0 1.1])
ylabel('\itz_A\rm(\itnT\rm)','FontSize',11)
text(1.0,0.4,'\itu\rm(\itt\rm) = 1','FontSize',11)
text(1.0,0.2,'\itT \rm= 0.05','FontSize',11)

subplot(2,2,3)
plot(t(1:freq:end),yA2(1:freq:end),'.','MarkerSize',ms)
axis([0 5 0 11])
xlabel('\itt','FontSize',11)
ylabel('\ity_A\rm(\itnT\rm)','FontSize',11)
text(1.8,4,'\itu\rm(\itt\rm) = 10','FontSize',11)
text(1.8,2,'\itT \rm= 0.05','FontSize',11)

subplot(2,2,4)
plot(t(1:freq:end),zA2(1:freq:end),'.','MarkerSize',ms)
axis([0 3 0 3.5])
ylabel('\itz_A\rm(\itnT\rm)','FontSize',11)
text(1.0,1.5,'\itu\rm(\itt\rm) = 10','FontSize',11)
text(1.0,0.9,'\itT \rm= 0.05','FontSize',11)
xlabel('\itt','FontSize',11)