Filter Designer
Versión 1.0.4 (1,43 KB) por
Ayad Al-Rumaithi
Helps determining the order of digital filters
Helps determining the order of digital filters. Change the filter order to get suitable response. Supports butterworth and filtfilt filters.
function FilterDesigner(fc1,fc2,fs,type,orderh,orderl)
Input:
fc1: lower-bound cutoff frequency
fc2: upper-bound cutoff frequency
fs: sampling frequency
type: filter type 'butter' for butterworth, 'filtfilt' for filtfilt
orderh: filter order for high pass filter
orderl: filter order for low pass filter
Output:
Plots frequency response of the high-pass, low-pass, and band-pass filters.
Important Notes:
1-filtfilt filter here is assumed to be buttworth filter applied to the input data in both the forward and reverse directions to get rid of phase distortion.
2-After choosing the suitable filter order, apply the filter to your data using the following lines:
for butterworth:
[B1,A1] = butter(orderh,fc1/(fs/2),'high');
[B2,A2] = butter(orderl,fc2/(fs/2),'low');
yh=filter(B1,A1,x); %apply high-pass filter to the data
yl=filter(B2,A2,x); %apply low-pass filter to the data
y=filter(B2,A2,yh); %apply band-pass filter to the data
for filtfilt:
[B1,A1] = butter(orderh,fc1/(fs/2),'high');
[B2,A2] = butter(orderl,fc2/(fs/2),'low');
yh=filtfilt(B1,A1,x); %apply high-pass filter to the data
yl=filtfilt(B2,A2,x); %apply low-pass filter to the data
y=filtfilt(B2,A2,yh); %apply band-pass filter to the data
where
x: is the data vector.
Citar como
Ayad Al-Rumaithi (2024). Filter Designer (https://www.mathworks.com/matlabcentral/fileexchange/71966-filter-designer), MATLAB Central File Exchange. Recuperado .
Compatibilidad con la versión de MATLAB
Se creó con
R2017b
Compatible con cualquier versión
Compatibilidad con las plataformas
Windows macOS LinuxCategorías
- Signal Processing > Signal Processing Toolbox > Digital and Analog Filters > Digital Filter Design > Butterworth >
Más información sobre Butterworth en Help Center y MATLAB Answers.
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