Consider the finite-length sequence x[n] in Figure. Let X(z) be the z-transform of x[n]. If we sample
Question:
Consider the finite-length sequence x[n] in Figure. Let X(z) be the z-transform of x[n]. If we sample X(z) at z = ej(2?/4)k, k = 0, 1, 2, 3, we obtain?
X1[k] = X(z) |z = ej(2?/4)k,? ? ? ? ? ? k = 0, 1, 2, 3.
Sketch the sequence x1[n] obtained as the inverse DFT of X1[k].
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3 -2 -1 0 1 2 3 4 5 6 7 8 9
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Related Book For
Discrete Time Signal Processing
ISBN: 978-0137549207
2nd Edition
Authors: Alan V. Oppenheim, Rolan W. Schafer
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