Desinging both IIR and FIR bandpass filter
조회 수: 3 (최근 30일)
이전 댓글 표시
Hello,
Can someone help me out in designing a IIR bandpass filter and FIR bandpass filter with the needed parameters of sampling rate=500Hz and frequencies to be passed are between 0.5 Hz to 2.4Hz.
Thanks.
댓글 수: 0
답변 (1개)
Jan
2014년 1월 1일
편집: Jan
2014년 1월 1일
What about a sixth order Butterworth for the IIR filter:
Wn = [0.5, 2.4] / 250;
[B, A] = butter(3, Wn)
And as a FIR filter:
[B, A] = fir1(3, Wn)
But there are a lot of other possible choices of parameters. Do you have any further details to consider?
댓글 수: 4
Jan
2014년 1월 5일
The posted details are not useful to specify filter conditions.
A filter cannot crop "everything" outside the band while keeping "all" frequencies inside the band. The are always effects on the edges of the band. It is impossible to keep all frequencies with 2.39999999999999999Hz and removing all signals with 2.40000000000000001Hz. The filter parameters, e.g. the order of the Butterworth filter define the slope of the damping at the edges.
참고 항목
제품
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!