How to design a filter with a given transfer function
显示 更早的评论
I need to design a filter with a given transfer function (one zero, two polls) using filterbuilder. I need to use "Filter Design HDL Coder " toolbox. The spec is available here: http://twitpic.com/6o0ggg I cannot figure out how to do it from filterbuilder or fdatool
采纳的回答
Honglei Chen
2011-9-22
Hi Evgeni,
I guess I misunderstood your question. If you already know your zeros and poles, then you already have the coefficients. So all you need to do is to create a dfilt object based on that and then use generatehdl to generate the HDL code.
z = -1;
p = [0.0948+0.3094i;0.0948-0.3094i];
k = 0.4576;
[s,g] = zp2sos(z,p,k);
hf = dfilt.df2sos(s,g);
generatehdl(hf)
HTH,
2 个评论
Evgeni Stavinov
2011-9-22
Raed Amhaz
2021-1-13
how i can use this filter and how to create an axis frequency for that filter?
更多回答（1 个）
Honglei Chen
2011-9-22
0 个投票
Hi Evgeni,
First of all, you will need to describe your response based on your frequency resposne curve. It looks like you know exactly what order you want for the filter, so you can fire up
filterbuilder('lowpass')
choose IIR and then type in those information as well as things like 3dB point.
Once you are happy with the design, you can then click 'Code Generation' panel on the GUI and there you will have option to generate the HDL code.
HTH
类别
在 帮助中心 和 File Exchange 中查找有关 Digital Filter Design 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
