DSP Format Discrete Transfer Function Matlab

2022 1 28
1 个回答
回答已采纳
更新时间：2022 1 28
7 次查看（30 天）

0 个投票

Hi,
If I have a discrete transfer function, defined using sys = filt(num,den)
In Matlab, how to I plot the response of the filter.
Can freqz be used? If so, how do I pass the filt(num,den) to freqz to obtain the bode diagram?
Thank you

请先登录，再回答此问题。

 采纳的回答

Paul
Paul 2022-1-28
Ran in:

0 个投票

Ran in:
You can use freqz() if you want, Because filt() returns a tf object from the Control System Toolbox, bode() or bodeplot() functions in that toolbox can also be used
num = [1 2];
den = [1 2 3 4];
sys = filt(num,den);
w = logspace(-2,pi,100);
[m,p] = bode(sys,w);
figure
subplot(211);
semilogx(w,db(squeeze(m)));
subplot(212)
semilogx(w,180/pi*angle(exp(1j*squeeze(p*pi/180))))
h = freqz(sys.num{:},sys.den{:},w);
figure;
subplot(211);
semilogx(w,db(abs(h)));
subplot(212);
semilogx(w,angle(h)*180/pi)

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Digital Filter Analysis 的更多信息

产品

版本

R2021b

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by