chap2_fig7_3.m

无线通讯系统的matlab仿真程序；主要包括同步

% Chap2_Fig7_3.m

clc
clear all
close all

xi=linspace(0,25,500);
yi=0.2*sqrt(xi);
plot(xi,yi)
axis([0 22 0 1])
hold on
ylabel('\ity','FontSize',11)
xl=10; xu=15;
yl=0.2*sqrt(xl);
yu=0.2*sqrt(xu);
plot(xl,yl,'.r','MarkerSize',15)
plot(xu,yu,'.r','MarkerSize',15)
plot([xl xl],[0 yl],':')
plot([xu xu],[0 yu],':')
text(5,0.6,'\ity \rm= \itx^{\rm1/2}','FontSize',11)
text(9.7,-0.09,'\itx_l','FontSize',11)
text(14.7,-0.09,'\itx_u','FontSize',11)
text(10.9,0.32,'region of','FontSize',11)
text(11.5,0.27,'linear','FontSize',11)
text(10.2,0.22,'approximation','FontSize',11)
text(22,-0.09,'\itx','FontSize',11)
title('Nonlinear Function with Approximately Linear Region','FontSize',11)