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ISRO EC 2018:Communication System Booster Quiz 3

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Question 1

The bit rate of QPSK is 90Mbit/s. The baud rate will be

Question 2

In a code-division multiple access (CDMA) system with N = 8 chips, the maximum number of users who can be assigned mutually orthogonal signature sequences is ________

Question 3

A memory less source limits n symbols each with a probability p. The entropy of the source as a function of n

Question 4

The capacity of a Binary Symmetric Channel (BSC) with cross-over probability 0.5 is ________

Question 5

A fair coin is tossed repeatedly until a ‘Head’ appears for the first time. Let L be the number of tosses to get this first ‘Head’. The entropy H(L) in bits is ________.

Question 6

The frequency range for satellite communication is

Question 7

The differential entropy H(X) of the uniformly distributed random variable X with probability density function fX(x)=

Question 8

A source generates eight equiprobable symbols. What would be the code length?
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May 29ESE & GATE EC