#### Special Cases

• norm

 (5.28)

• Sum of the absolute values of the elements
• City block'' distance
• norm

 (5.29)

• Euclidean'' distance
• Minimized by Least Squares'' techniques

• norm

 (5.30)

In the limit as , the norm of is dominated by the maximum element of . Optimal Chebyshev filters minimize this norm of the frequency-response error.

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Windowing a Desired Impulse Response Computed by the Frequency Sampling Method