The power spectral density of white noise is (i) Zero (ii) Constant (i

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Module 3: Probability & Random Processes

20252m

The power spectral density of white noise is
(i) Zero
(ii) Constant
(iii) Exponential
(iv) Parabolic

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Answer

Correct Option: (ii) Constant

Explanation

White noise $n(t)$ PSD $S_n(f)=N_0/2$ flat over $-\infty$ to $\infty$ , autocorrelation $R(\tau)=N_0/2\delta(\tau)$ . Zero mean Gaussian.

Not zero, exponential, parabolic.

Final Answer

Constant → Option (ii).

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