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Remez Exchange page (Digital Filter Design wizard) |
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Use this page to indicate specifics about the edge frequencies for the filter you want to design using the Remez Exchange algorithm.
Options
Min. Attenuation for Given Length
Select this option to specify the design of a filter that achieves the minimum possible attenuation for the specified filter length (Filter Length).
Min. Length for Given Attenuation
Select this option to specify the design of the shortest possible filter that achieves the specified minimum attenuation in decibels (Min. Attenuation (dB)).
 | The length of the filter is calculated according to Ichige, Iwaki, and Ishii (2000). |
Arguments
Displays the filter length as specified in the FIR Filter Design page as a reference.
Type in this box the minimum attenuation you want the resulting filter to achieve.
| This value is needed only when the Min. Length for Given Attenuation option is selected. |
Check this box if you want to force the length of the resulting filter to an even length.
| This option is available only when the Min. Length for Given Attenuation option is selected. |
Type in this box the ratio of the bandpass ripples to the bandstop ripples you want the filter to achieve. A typical value for this ratio is 25.
Type in this box the first edge of the first cutoff frequency in normalized form (i.e., a value between 0 and 0.5) for the filter you want to design. Edge pairs provide a transition band between a pass and a stop band.
Refer to the figure of the example as a guide.
Type in this box the second edge of the first cutoff frequency in normalized form (i.e., a value between 0 and 0.5) for the filter you want to design. Edge pairs provide a transition band between a pass and a stop band.
Refer to the figure of the example as a guide.
Type in this box the first edge of the second cutoff frequency in normalized form (i.e., a value between 0 and 0.5) for the filter you want to design. Edge pairs provide a transition band between a pass and a stop band.
Refer to the figure of the example as a guide.
| This value is not required for some filter types. |
Type in this box the second edge of the second cutoff frequency in normalized form (i.e., a value between 0 and 0.5) for the filter you want to design. Edge pairs provide a transition band between a pass and a stop band.
Refer to the figure of the example as a guide.
| This value is not required for some filter types. |
Example of a Designed Bandpass Filter Using the Remez Exchange Algorithm
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