engineering recuitment NIC NIELIT Scientist B 2023 Mock Test Communication Systems Random Processes Correlation and Power Spectral Density
If the power spectral density is \(\frac{\eta }{2}\frac{W}{{Hz}}\) , and the autocorrelation function is defined by:
\(R(\tau ) = \frac{\eta }{2}\int\limits_{ - \infty }^{ + \infty } {{e^{j\omega \tau }}} df\) .
The integral on the right represents the Fourier transform of:
1
Delta function
2
Step function
3
Ramp function
4
Sinusoidal function