41. The units of the spectrum obtained by Fourier transforming the covariance function of a stationary stochastic process is
42. Zero padding are
43. In Digital Filters, how many interpolated data points are inserted between samples when performing 4X over sampling?
44. Which of the following statement is not true
45. Which of the following is not a periodic function of φ?
46. Which of the following cannot be the Fourier series expansion of a periodic signal?
47. A system with input x[n] and output y[n] is given as $$y\left[ n \right] = \left( {\sin \frac{5}{6}\pi n} \right)x\left( n \right).$$
The system is
The system is
48. Let F(ω) be the Fourier transform of a function f(t), then F(0) is
49. Let P be linearity, Q be time-invariance, R be causality and S be stability. A discrete-time system has the input-output relationship,
\[y\left( n \right) = \left\{ {\begin{array}{*{20}{c}}
{x\left( n \right),}&{n \geqslant 1} \\
{0,}&{n = 0} \\
{x\left( {n + 1} \right)}&{n \leqslant - 1}
\end{array}} \right.\]
Where x(n) is the input and y(n) is the output.
The above system has the properties
\[y\left( n \right) = \left\{ {\begin{array}{*{20}{c}} {x\left( n \right),}&{n \geqslant 1} \\ {0,}&{n = 0} \\ {x\left( {n + 1} \right)}&{n \leqslant - 1} \end{array}} \right.\]
Where x(n) is the input and y(n) is the output.
The above system has the properties
50. Consider a random sinusoidal signal x(t) = sin(ω0t + φ), where a random variable 'φ' is uniformly distributed in the range $$ \pm \frac{\pi }{2}.$$ The mean value of x(t) is
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