Signal Processing Toolbox

Magnitude Specifications Region: Bandpass

IIR	FIR
Butterworth	Equiripple
Chebyshev Type I	Least-Squares
Chebyshev Type II	Window
Elliptic	Constr. Least-Squares

IIR Butterworth

If Specify order is selected in the Filter Order region, the attenuation at the cutoff frequency is fixed at 3 dB (half the passband power).

If Minimum order is selected in the Filter Order region, select the units for magnitude response characteristics from the Units list:

• dB for magnitude response characteristics in decibels (default)
• Squared for squared magnitude response characteristics

Specify the magnitude response characteristics in the text boxes:

• Astop1 or Estop1--attenuation in the first stopband
• Apass or Epass--passband ripple
• Astop2 or Estop2--attenuation in the second stopband

IIR Chebyshev Type I

If Specify order is selected in the Filter Order region, specify the passband ripple (Apass) in decibels.

If Minimum order is selected in the Filter Order region, select the units for magnitude response characteristics from the Units list:

• dB for magnitude response characteristics in decibels (default)
• Squared for squared magnitude response characteristics

Specify the following magnitude response characteristics in the text boxes:

• Astop1 or Estop1--attenuation in the first stopband
• Apass or Epass--passband ripple
• Astop2 or Estop2--attenuation in the second stopband

IIR Chebyshev Type II

If Specify order is selected in the Filter Order region, specify the stopband attenuation (Astop or Estop) in decibels.

If Minimum order is selected in the Filter Order region, select the units for magnitude response characteristics from the Units list:

• dB for magnitude response characteristics in decibels (default)
• Squared for squared magnitude response characteristics

Specify the following magnitude response characteristics in the text boxes:

• Astop1 or Estop1--attenuation in the first stopband
• Apass or Epass--passband ripple
• Astop2 or Estop2--attenuation in the second stopband

IIR Elliptic

Select the units for magnitude response characteristics from the Units list:

• dB for magnitude response characteristics in decibels (default)
• Squared for squared magnitude response characteristics

If Specify order is selected in the Filter Order region, specify the following magnitude response characteristics (in dB) in the text boxes:

• Astop or Estop--attenuation in the stopband
• Apass or Epass--passband ripple

If Minimum order is selected in the Filter Order region, specify the following magnitude response characteristics (in dB) in the text boxes:

• Astop1 or Estop1--attenuation in the first stopband
• Apass or Epass--passband ripple
• Astop2 or Estop2--attenuation in the second stopband

FIR Equiripple

If Specify order is selected in the Filter Order region, specify the following relative weights in the text boxes:

• Wstop1--weight in the first stopband
• Wpass--weight in the passband
• Wstop2--weight in the second stopband

If Minimum order is selected in the Filter Order region, select the units for magnitude response characteristics from the Units list:

• dB for magnitude response characteristics in decibels (default)
• Linear for linearly scaled magnitude response characteristics

Specify the following magnitude response characteristics in the text boxes:

• Astop1 or Estop1--attenuation in the first stopband
• Apass or Epass--passband ripple
• Astop2 or Estop2--attenuation in the second stopband

FIR Least-Squares

Specify the magnitude weights, as linear multipliers, in the text boxes:

• Wstop1--weight in the first stopband
• Wpass--weight in the passband
• Wstop2--weight in the second stopband

FIR Window

If Specify order is selected in the Filter Order region, the attenuation at the cutoff frequency is fixed at 6 dB (half the passband gain).

For the Kaiser window option, if Minimum order is selected in the Filter Order region, select the units for magnitude response characteristics from the Units list:

• dB for magnitude response characteristics in decibels (default)
• Linear for linearly scaled magnitude response characteristics

Specify the following magnitude response characteristics in the text boxes:

• Astop1 or Estop1--attenuation in the first stopband
• Apass or Epass--passband ripple
• Astop2 or Estop2--attenuation in the second stopband

FIR Constr. Least-Squares

Specify the magnitude response characteristics in the text boxes:

• Dpass--Upper and Lower bounds of the passband.
• Dstop--Upper and Lower bounds of the stopband

Magnitude Specifications Region: Highpass

Magnitude Specifications Region: Bandstop

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