Figure shows a sequence x[n] for which the value of x[3] is an unknown constant c. The
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Figure shows a sequence x[n] for which the value of x[3] is an unknown constant c. The sample with amplitude c is not necessarily drawn to scale. Let
X1[k] = X[k]ej2?3k/5.
Where X[k] is the five-point DFT of x[n]. The sequence x1[n] plotted in Figure is the inverse DFT of X1[k]. What is the value of c?
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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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