Consider the system shown in Figure. The input to this system is the bandlimited signal whose Fourier
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Consider the system shown in Figure. The input to this system is the bandlimited signal whose Fourier transform is shown in Figure with ?0?= ? / T. The discrete-time LTI system in Figure has the frequency response shown in Figure.
(a) Sketch the Fourier transforms X(ej?), Xe(ej?), ye(e j?), and yc(j?).
(b) For the general case when Xc(j?). = 0 for |?| ? ? / T, express yc(j?) in terms of Xc(j?). Also, give a general expression for yc(t) in terms of xc(t) when xc(t) is bandlimited in this manner.
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Discrete Time Signal Processing
ISBN: 978-0137549207
2nd Edition
Authors: Alan V. Oppenheim, Rolan W. Schafer
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