Problem 10-1 Consider the signal x(t) = 8 cos(2π(30)t +π/3). (a) Sketch the spectrum of the signal x(t). Show the spectrum as a function of f in Hz. For the rest of this problem, assume that the signal is sampled at a rate of fs = 50 Hz. (b) Sketch the spectrum for the sampled signal x[n]. Your spectrum should be shown as a function of the frequency ŵ over the interval -2π ≤ŵ≤ +2π. (c) Write an equation for the sampled signal x[n]. (d) Suppose that the signal is reconstructed from its samples using ideal reconstruction, i.e., it passes through an ideal D/C converter. Sketch the spectrum of the reconstructed signal x, (t) as a function of f in Hz. (e) Write an equation for the reconstructed signal x,(t). Is x(t) = x(t)? Why or why not?

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Problem 10-1
Consider the signal x(t) = 8 cos(2π(30)t +π/3).
(a) Sketch the spectrum of the signal x(t). Show the spectrum as a function of f in Hz.
For the rest of this problem, assume that the signal is sampled at a rate of fs = 50 Hz.
(b) Sketch the spectrum for the sampled signal x[n]. Your spectrum should be shown as a function of
the frequency ŵ over the interval -2π ≤ŵ≤ +2π.
(c) Write an equation for the sampled signal x[n].
(d) Suppose that the signal is reconstructed from its samples using ideal reconstruction, i.e., it passes
through an ideal D/C converter. Sketch the spectrum of the reconstructed signal x, (t) as a function
of f in Hz.
(e) Write an equation for the reconstructed signal x,(t). Is x(t) = x(t)? Why or why not?
Transcribed Image Text:Problem 10-1 Consider the signal x(t) = 8 cos(2π(30)t +π/3). (a) Sketch the spectrum of the signal x(t). Show the spectrum as a function of f in Hz. For the rest of this problem, assume that the signal is sampled at a rate of fs = 50 Hz. (b) Sketch the spectrum for the sampled signal x[n]. Your spectrum should be shown as a function of the frequency ŵ over the interval -2π ≤ŵ≤ +2π. (c) Write an equation for the sampled signal x[n]. (d) Suppose that the signal is reconstructed from its samples using ideal reconstruction, i.e., it passes through an ideal D/C converter. Sketch the spectrum of the reconstructed signal x, (t) as a function of f in Hz. (e) Write an equation for the reconstructed signal x,(t). Is x(t) = x(t)? Why or why not?
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