In this problem we develop the dual to the time-domain sampling theorem, whereby a time-limited signal can be reconstructed from frequency-domain samples. To develop this result, consider the frequency-domain sampling operation in Figure P7.52
(a) Show
Where are the inverse Fourier transform of and P(jω), respectively
(b) Assuming that x(t) is time-limited so that show that x(t) can be obtained from through a “low-time windowing” operation. That is,
Where
(c) Show that x(t) is not recoverable from is not constrained to be zero for .
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