exa1_10.m

新版Matlab 7辅助信号处理技术与应用

% exa1-10_exponent_modulate_sine_fun_c.m for example 1-10
% exponent modulated sine function

clear all;
t=0:0.001:2.5;
A=3;
a=0.5;
f=5;
fai=1;
u1=A*exp(a*t);
u2=sin(2*pi*f*t+fai);
u12=u1.*u2;
t0=1;
u3=stepfun(t,t0);
u=u12.*u3;
plot(t,u)
axis([0 2.6 -10.2 10.2])