ex5_3.m

经典《信号与系统》教程的matlab例程,对深入理解信号与系统相关概念有很大帮助

t=0:0.01:4;
f=sin(pi*t);
c=cos(8*pi*t);
f1=(3+f).*c;
f2=f.*c;
subplot(3,1,1)
plot(t,f);grid on;title('the baseband signal g(t)')
subplot(3,1,2)
plot(t,f2);grid on;ylabel('AM-SC')
subplot(3,1,3)
plot(t,f1);grid on;ylabel('AM')