| 1. | High speed modems use adaptive equalizers to compensate for non-constant group delay.
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| 2. | The following proof illustrates this idea of minimum group delay.
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| 3. | Other writers suggest that a group delay ripple of a few percent is permissible.
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| 4. | The Bessel filter maximizes the flatness of the group delay curve at zero frequency.
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| 5. | The filter has a low-frequency group delay of 1 / \ omega _ 0.
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| 6. | A plot of the gain and group delay for a fourth-order low pass Bessel filter.
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| 7. | Equalizing filters must cancel out any group delay and phase delay between different frequency components.
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| 8. | For all causal and magnitude response, the minimum phase system has the minimum group delay.
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| 9. | Inserting the expressions for u and v and rearranging gives the following equation for group delay.
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| 10. | An example of a fourth order network, with 10 % group delay ripple is considered later.
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