Signal Processing Toolbox

Magnitude Specifications Region: Highpass

IIR	FIR
Butterworth	Equiripple
Chebyshev Type I	Least-squares
Chebyshev Type II	Window
Elliptic	Constr. Least-Squares
Maximally flat	Complex Equirpple

IIR Butterworth

If Specify order is selected in the Filter Order region, the attenuation at the cutoff frequency is fixed at 6 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:

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

IIR Chebyshev Type I

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

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:

• Astop or Estop--stopband attenuation (for Minimum order only)
• Apass or Epass--passband ripple

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:

• Astop or Estop--stopband attenuation (for Minimum order only)
• Apass or Epass--passband ripple

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

Specify the magnitude response characteristics (in dB) in the text boxes:

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

IIR Maximally Flat

The magnitude at cutoff frequencies is fixed at half the passband gain (-3dB).

FIR Equiripple

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

• Wstop--weight in the stopband
• Wpass--weight in the passband

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:

• Astop or Dstop--stopband attenuation
• Apass or Dpass--passband ripple

FIR Least-Squares

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

• Wstop--weight in the stopband
• Wpass--weight in the passband

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:

• Astop or Dstop--stopband attenuation
• Apass or Dpass--passband ripple

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

FIR Complex Equiripple

Specify the following relative weights in the text boxes:

• Wpass1 and Wpass2--weights in the passands
• Wstop--weight in the stopband

Magnitude Specifications Region: Raised Cosine

Magnitude Specifications Region: Bandpass

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