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ISRO EC 2018:Communication System Booster Quiz 4

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Question 1

Two independent random variable X and Y are uniformly distributed in the interval [-1, 1]. The probability that max [X, Y] is less than 1/2 is

Question 2

If E denotes expectation, the variance of a random variable X is given by

Question 3

A message m(t) band-limited to the frequency fmhas a power of Pm. The power of the output signal in the following figure is

Question 4

Y=X2 is a zero mean stationary Gaussian random process with auto correlation for  , then find the value of ?

Question 5

The equivalent noise temperature of a parametric amplifier is 40 K, if the ambient temperature is C then noise figure is

Question 6

For the probability density function shown below find

Question 7

A random process consists of three samples function

each occurring with equal probability. The process is

Question 8

The input to a coherent detector is DSB–SC signal plus noise. The noise at the detector output is
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Oct 5ESE & GATE EC