Question: Show that a filter with transfer function H = 4 1 0 5 2 + 1 0 1 0 e - jt 0 is unrealizable.
Show that a filter with transfer function
Hejt
is unrealizable. Can this filter be made approximately realizable by choosing a sufficiently large t Use your own reasonable criterion of approximate realizability to determine t
Hint: Show that the impulse response is noncausal.
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