Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Digital signals and Filtering 

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P-7.7 The convolution property of the DTFT can simplify difficult operations that arise
in LTI filtering. Simplify the following:
sin(0.25n) sin(0.447n)
(a) xi[n] =
*
9nn
sin(0.257n) sin(0.25tn)
(b) x2[n] =
9πη
Ίπη
(c) x3[n] = (0.3)" u[n] * (108[n – 2] – 38[n – 3])
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Transcribed Image Text:P-7.7 The convolution property of the DTFT can simplify difficult operations that arise in LTI filtering. Simplify the following: sin(0.25n) sin(0.447n) (a) xi[n] = * 9nn sin(0.257n) sin(0.25tn) (b) x2[n] = 9πη Ίπη (c) x3[n] = (0.3)" u[n] * (108[n – 2] – 38[n – 3])
P-7.8 The frequency response of an LTI system is H(ei@) = cos(3ô). Determine the
output of the system for each of the following input signals:
(a) x1[n] = 8[n – 3]
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Transcribed Image Text:P-7.8 The frequency response of an LTI system is H(ei@) = cos(3ô). Determine the output of the system for each of the following input signals: (a) x1[n] = 8[n – 3]
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