Discrete low-pass filter

2021 1 8
0 个回答
更新时间：2021 1 11
5 次查看（30 天）

0 个投票

Hi community!
I have created a Matlab function block. Then I have set its sample time equal to "Ts" (100e-6). After that I implemented a simple low-pass filter code using this block, the results are different from when I build the filter using the "1/s" and "gain" blocks of Simulink. The transfer function of the filter is:
Y/X=1/(1+sTc)
I have implemented it by applying the backward Euler discretizing method as :
Y(k)=(Ts/(Ts+Tc))X(k)+(Tc/(Tc+Ts))Y(k-1)
where X is a sinusoidal function given from outside of the Matlab function block.
Is it something wrong here?
Regards,

2 个评论
显示 无 隐藏 无

Mathieu NOE
Mathieu NOE 2021-1-8
hi
you can use c2dm to discretize analog filters
also se attached some typical digital filters implementation
lionel messi
lionel messi 2021-1-11
Thank you for the reply and the files!
I'm gonna try these..
Regards

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Get Started with DSP System Toolbox 的更多信息

产品

标签

Community Treasure Hunt

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

Start Hunting!

Translated by