NInverseDTFourierTransform

NInverseDTFourierTransform[expr,ω,n]
gives a numerical approximation to the inverse discrete time Fourier transform of expr evaluated at the integer n, where expr is a periodic function of ω with period 1.

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基本范例  (1)基本范例  (1)

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Numerical value for a sequence with a given discrete time Fourier transform:

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Compare with the answer from symbolic evaluation:

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