Question:medium

A random process is stationary

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A stationary random process has time-invariant statistical properties such as mean, variance and autocorrelation.

Updated On: Jun 25, 2026

If all statistical properties do not change with time
If the future values of any sample function can be predicted from present values only
Future values cannot be predicted
If the future values of any sample function can be predicted from past values only

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The Correct Option is A

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Top Questions on communication systems

The percentage of the total power carried by the sidebands of the AM wave for tone modulation when the modulation index is 0.3 is:
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Match List-I with List-II:

List-I (Modulation Schemes)	List-II (Wave Expressions)
(A) Amplitude Modulation	(I) \( x(t) = A\cos(\omega_c t + k m(t)) \)
(B) Phase Modulation	(II) \( x(t) = A\cos(\omega_c t + k \int m(t)dt) \)
(C) Frequency Modulation	(III) \( x(t) = A + m(t)\cos(\omega_c t) \)
(D) DSB-SC Modulation	(IV) \( x(t) = m(t)\cos(\omega_c t) \)

Choose the correct answer:

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