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IIR Filter Design Using MATLAB

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IIR Filter Design Using MATLAB¿¡ ´ëÇÑ ÀÚ·áÀÔ´Ï´Ù.
IIR_Filter_Design_Using_MATLAB
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I. IIR Filter Order Selection
¡Ø IIR Filter´Â Filter Â÷¼ö¸¦ ÀÓÀÇ·Î Á¤ÇÏ´Â °ÍÀÌ ¾Æ´Ï¶ó FilterÀÇ Spec¿¡ µû¶ó ÃÖÀûÀÇ Filter Â÷¼ö¸¦ °áÁ¤ÇÏ¿© »ç¿ëÇØ¾ß ÇÑ´Ù.

1. buttord

- Butterworth Filter order selection
¢º ±âº» ÇüÅÂ
[n,wn] = buttord(wp, ws, Rp, Rs)
n : IIR Filter order
wn : Normalized Cutoff Frequency (where, 1 corresponds to radians/sample)
wp : Normalized Passband Edge Frequency (where, 1 corresponds to radians/sample)
ws : Normalized Stopband Edge Frequency (where, 1 corresponds to radians/sample)
Rp : Passband Ripple (Rp dB)
Rs : Stopband Attenuation (Rs dB)
For example,
Lowpass : wp = 0.1, ws = 0.2
Highpass : wp = 0.2, ws = 0.1
Bandpass : wp = [0.2 0.7], ws = [0.1 0.8]
Bandstop : wp = [0.1 0.8], ws = [0.2 0.7]

2. Cheb1ord / Cheb2ord

- Chebyshev Filter Type I / Type II order selection
¢º ±âº» ÇüÅÂ
[n,wn] = cheb1ord(w¡¦(»ý·«)



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Date : 2012-09-10
FileNo : 16128649

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