Question: Consider a system with a real-valued impulse response h(n) and frequency response H(?) = |H (?)| ej? (?) The quantity provides a measure of the

Consider a system with a real-valued impulse response h(n) and frequency response H(?) = |H (?)| ej? (?)

The quantity provides a measure of the ?effective duration? of h(n)

D = E nh*(n) n=-

(a) Express D in terms of H(?).

(b) Show that D is minimize for ?(?) = 0.

D = E nh*(n) n=-

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