Communication Systems - Study Mode
[#86] Mean of two batsmen A and B are $${overline X _A} = 48$$ xa0 and $${overline X _B} = 46.$$ xa0Their coefficient of variation are 0.37 and 0.26 respectively. Then which of the following is correct?
Correct Answer
(A) A is better scorer and more consistent than B
[#87] A signal with two frequency components at 6 kHz and 12 kHz, is sampled at the rate of 16 kHz and then passed through a Low Pass filter having a cut-off frequency of 16 kHz. The output signal of the filter
Correct Answer
(D) Contains both the components of the original signal and two spurious components of 4 kHz and 10 kHz
[#88] Light is good for telecommunications because it is:
Correct Answer
(A) a high-frequency carrier
[#89] A Frequency Hopping Spread Spectrum system has its frequency synthesizers controlled by five stage shift-registers with feedback connections taken from the second and fifth stages. The number of slots available for frequency hopping is
Correct Answer
(A) 32
[#90] Consider a WSS random process X(t), whose amplitudes are normally distributed with E(x(t)) = 0 and R x (τ) = e -2[τ] . Then P(X(t)) ≤ 2) = ? $$left( {Qleft( alpha
ight) = frac{1}{{sqrt {2pi } }}intlimits_alpha ^infty {{e^{ - frac{{{x^2}}}{2}}}} dx}
ight)$$
Correct Answer
(B) 1 - Q(2)