9.2 For the discrete-time periodic signal x[n] (a) Determine its fundamental period No. (b) Suppose we sample the continuous-time signal x(t) = cos (?t) with a sampling period T = 0.7. Is the Nyquist sampling condi- tions satisfied? How does the sampled signal compare to x[n]? (c) Under what conditions would sampling a continuous-time signal x(t) = cos (?t) give a discrete-time sinusoid x[n] that resembles x(t)? Explain and give an example. = cos (0.7??),

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.2 For the discrete-time periodic signal

x [n] = cos (0.7 ?n)

, (a) Determine its fundamental period

N_{0}

. (b) Suppose we sample the continuous-time signal

x (t) = cos (? t)

with a sampling period

T_{s} = 0.7

. Is the Nyquist sampling conditions satisfied?How does the sampled signal compare to

x [n]

? (c) Under what conditions would sampling a continuous-time signal

x (t) = cos (? t)

give a discrete-time sinusoid

x [n]

that resembles

x (t)

? Explain and give an example.

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