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GATE EC : Communications Champion Quiz 5
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Question 1
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 2
In time division multiplexing
Question 3
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 4
If R(τ) is the autocorrelation function of real, wide sence stationary random process, then which of the following is NOT true?
Question 5
The distribution function fx(x) of a random variable X is shown in Figure. the probability that X = 1 is
Question 6
An Ideal power limited Communications channel with additive white Gaussian noise with 1 MHz band width and Signal to Noise ratio of 15 is transmitting the information at theoretical maximum rate. If the Signal to Noise ratio is reduced to 7, how much bandwidth is required to maintain same rate:
Question 7
Maximum coding gain in
Question 8
BCH code belongs to
Question 9
A memory less source emits n symbols each with a probability p. The entropy of the source as a function of n
Question 10
A source has 512 symbols which have equal probability and all symbols transmitted independently. Find maximum rate (in symbols/sec) such that the error probability is low during transmitting symbols. The channel is AWGN and has bandwidth of 6 KHz and SNR of 63.
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Jun 9ESE & GATE EC
