Shown in Figure are three finite-length sequences of length 5. X i (e j? ) denotes the
Question:
Shown in Figure are three finite-length sequences of length 5. Xi(ej?) denotes the DTFT of xi[n], and Xi[k] denotes the five-point DFT of xi[n]. For each of the following properties, indicate which sequence and satisfy the property and which do not. Clearly justify your answers for each sequence and each property.
(i) Xi[k] is real for all k.?
(ii) Xi(ej?) = Ai(?)ejai?, where Ai(?) is real and ?i is constant.
(iii) Xi[k] = Bi[k]ejyik where Bi[k] is real and yi is a constant.
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4. xa[n] 2. 4.
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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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