exe0110.m

Matlab程序为清华大学胡广书版信号处理的上机习题答案

clear;


a1=2;
a2=10;
f1=40;
f2=50;
fs=1000;
ts=0.001;

n=0:1:100;
x1=sin(2*pi*f1/fs*n);
x2=cos(2*pi*f2/fs*n);
x3=sin(2*pi*f1/fs*n).*cos(2*pi*f2/fs*n);
subplot(311);
stem(n,x1);
subplot(312);
stem(n,x2);
subplot(313);
stem(n,x3);
sx=sum(x3)
sn=sum(n)