Let x1[n] be a sequence obtained by expanding the sequence x[n] = (1/4)n u[n] by a factor

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Let x1[n] be a sequence obtained by expanding the sequence x[n] = (1/4)n u[n] by a factor of 4; i.e.,

Find and sketch a six-point sequence q[n] whose six-point DFT Q[k] satisfies the two constraints.

Q[0] = X1(1),

Q[3] = X1(??? 1),

where X1(z) represents the z-transform ofX1[n].

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Discrete Time Signal Processing

ISBN: 978-0137549207

2nd Edition

Authors: Alan V. Oppenheim, Rolan W. Schafer

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Question Posted: May 26, 2011 01:52 AM

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Let x1[n] be a sequence obtained by expanding the sequence x[n] = (1/4)n u[n] by a factor

Question:

k = 0, 14, 18..... x\n/4]. 0. otherwise. x1[n] =

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Discrete Time Signal Processing

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