dm13502.m

来自「the code of the book come form the book 」· M 代码 · 共 17 行

%dm13502 
%计算离散系统频率响应并绘制其幅频和相频特性曲线
 num=[1/4 1/4];
 den=[1 -1/2];
 [H,w]=freqz(num,den);
 Hm=abs(H);
 Hp=angle(H)*180/pi;
 w=w/pi
 plot(w,Hm)
 title('离散系统幅频特性曲线')
 xlabel('\theta/\pi');
 ylabel('Magnitude')
 plot(w,Hp)
 title('离散系统相频特性曲线')
 xlabel('\theta/\pi');
 ylabel('Phase,degrees')