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Spectral density of the white noise is

This question was previously asked in
URSC ISRO Technical Assistant Electronics 20 August 2017 Official Paper
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  1. Uniform
  2. Exponential
  3. Gaussian
  4. Poisson

Answer (Detailed Solution Below)

Option 1 : Uniform
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Detailed Solution

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White noise is that signal whose frequency spectrum is uniform i.e. it has flat spectral density.

The power spectral density (PSD) of white noise is uniform throughout the frequency spectrum as shown:

F2 S.B Madhu 31.10.19 D 2

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Q1.Consider a WSS random process X(t) passing through an LTI system with impulse response h(t) = δ(t + a) − δ(t − a). Let the output random process be Y(t). Then, power spectral density Sy(ω) of random process Y(t) in terms of power spectral density Sx(ω) of random process X(t) is:
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