Electronics and Communication Engineering - Exam Questions Papers - Discussion


Thermal noise is passed through an ideal low-pass filter having cut-off at fc = ωHz. The auto correlation value of the noise at the output of the filter is given as

[A]. Triangular function over the range
[B]. Gaussian over the range -∞ ≤ t ≤ ∞
[C]. A Delta function at t = 0
[D]. Sin c function over the range - ∞ ≤ t ≤ ∞

Answer: Option D


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