Q.1
According to Parseval’s theorem the energy spectral density curve is equal to?
  • area under magnitude of the signal
  • area under square of the magnitude of the signal
  • area under square root of magnitude of the signal
  • none of the mentioned
Q.2
What is Wiener-Khinchin theorem?
  • spectral density and auto-covariance makes a fourier transform pair
  • spectral density and auto-correlatioon makes a fourier transform pair
  • spectral density and variance makes a fourier transform pair
  • none of the mentioned
Q.3
How can power spectral density of non periodic signal be calculated?
  • by integrating
  • by truncating
  • by converting to periodic
  • none of the mentioned
Q.4
Power spectrum describes distribution of under frequency domain.
  • mean
  • variance
  • gaussian
  • none of the mentioned
Q.5
Energy spectral density defines
  • signal energy per unit area
  • signal energy per unit bandwidth
  • signal power per unit area
  • signal power per unit bandwidth
Q.6
Power spectral density function is a?
  • real and even function
  • non negative function
  • periodic
  • all of the mentioned
Q.7
White noise has mean and _ variance.
  • zero and zero
  • finite and zero
  • zero and finite
  • one and zero
Q.8
Which gives the measure of randomness of the random variable?
  • mean
  • variance
  • standard variance
  • pdf
Q.9
Random process is a function of
  • random event and time
  • random event and frequency
  • random event and real number
  • none of the mentioned
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