chap2_ex2_1.m

无线通讯系统的matlab仿真程序；主要包括同步

% Chap2_Ex2_1.m


close all
hold off
clc
clear all
v0=3; E0=12; R=5000; C=0.000000125;
tau=R*C; K=1;

vss=K*E0;

ti=linspace(0,5*tau,300);
vi=v0*exp(-ti/tau)+K*E0*(1-exp(-ti/tau));
vtri=(v0-K*E0)*exp(-ti/tau);
hold on
plot([0 5*tau],[vss vss],'g','LineWidth',1.2)
plot(ti,vtri,'b','LineWidth',1.2)
plot(ti,vi,'r','LineWidth',1.2)
plot([-0.0005 5*tau],[0 0],'k')
plot([0 0],[v0-K*E0 vss],'k:')
v=[-0.0002 0.003 -10 15];
axis(v)
title('Steady-state, Transient and Total Response','FontSize',11)
xlabel('\itt  \rm(sec)','FontSize',11)
ylabel('\itv\rm(\itt\rm),  volts','FontSize',11)
text(0.0005,13,'\itv_{c}\rm(\infty) = 12 volts','FontSize',11)
text(0.0006,7.5,'\itv_{c}\rm(\itt\rm) = \itv_{c}\rm(\infty) + \itv_{c}\rm(\itt\rm)_{\ittr}','FontSize',11)
text(0.0006,-5,'\itv_{c}\rm(\itt\rm)_{\ittr} = -9e^{-\itt /\tau}','FontSize',11)
text(0.00175,-5,'\tau = 0.625 msec','FontSize',11)
%plot(gca,'XTick',[0:0.5e-3:3e-3])
plot([0],[3],'.k')
text(0.1e-3,3,'\itv_{c}\rm(0) = 3 volts','FontSize',11)