Consider the system of Figure, with the discrete-time system an ideal lowpass filter with cutoff frequency ?/8

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Consider the system of Figure, with the discrete-time system an ideal lowpass filter with cutoff frequency ?/8 radians/s.?

(a) If xc(t) is bandlimited to 5 kHz, what is the maximum value of T that will avoid aliasing in the C/D converter?

(b) If 1/T = 10 kHz, what will the cutoff frequency of the effective continuous-time filter be?

(c) Repeat part (b) for 1/T = 20 kHz.

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Discrete Time Signal Processing

ISBN: 978-0137549207

2nd Edition

Authors: Alan V. Oppenheim, Rolan W. Schafer

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