engineering recuitment GATE ECE 2023-24 Test Series Communication Systems Random Processes Correlation and Power Spectral Density
Which of the following could NOT be the auto correlation function of a random process?
1
\(R(\tau)=\dfrac{\sin \tau}{\tau}\)
2
\(R(\tau)=\tau^3 +2\)
3
\(R(\tau)=\left\{\begin{matrix}1-|\tau|;&|\tau|<1\\\ 0;&|\tau|>1\end{matrix}\right.\)
4
\(R(\tau)=10 \sin 3\tau\)