Electronics and Communication Engineering (ECE) > Test: Digital Communications - 1

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Test: Digital Communications - 1 for Electronics and Communication Engineering (ECE) 2023 is part of Electronics and Communication Engineering (ECE) preparation. The Test: Digital Communications - 1 questions and answers have been prepared
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Detailed Solution for Test: Digital Communications - 1 - Question 1

Test: Digital Communications - 1 - Question 2

**Consider Y= ax+b, a>0. If the density and distribution functions of x are F. (x) and f**_{x}** (x), then F**_{y} (y) is equal to

Detailed Solution for Test: Digital Communications - 1 - Question 2

Test: Digital Communications - 1 - Question 3

**Consider a random process x(t). Which of the following can represent R**_{x}**. (r)?**

Detailed Solution for Test: Digital Communications - 1 - Question 3

*Answer can only contain numeric values

Test: Digital Communications - 1 - Question 4

**It is required to transmit at 100 Kbit/s and a bandwidth of 2 MHz is used. The**

**minimum S/N ratio is ___________________ **

Detailed Solution for Test: Digital Communications - 1 - Question 4

*Answer can only contain numeric values

Test: Digital Communications - 1 - Question 5

**SNR when the system is uncoded is 4 dB, when it is coded is 2 dB then the coding gain is ________________ (dB)**

Detailed Solution for Test: Digital Communications - 1 - Question 5

Test: Digital Communications - 1 - Question 6

**In the set up shown below, determine the number of bits required to encode each sample of x (t) such that bandwidth of signal y(t) is greater than 5 MHz.**

Detailed Solution for Test: Digital Communications - 1 - Question 6

Test: Digital Communications - 1 - Question 7

A sinusoidal signal whose peak-peak amplitude is 6 V is modulated using deltamodulator. At what rate should be sinusoidal signal sampled such that slope over load distortion is prevented with step size of 0.942 V?

Detailed Solution for Test: Digital Communications - 1 - Question 7

Test: Digital Communications - 1 - Question 8

The probability of the five possible outcomes of an experiment are given as

Determine the informationrate, if there are 8 outcomes per second.

Detailed Solution for Test: Digital Communications - 1 - Question 8

Test: Digital Communications - 1 - Question 9

Probability of picking 3 symbols are **P _{0}, **P

Detailed Solution for Test: Digital Communications - 1 - Question 9

Test: Digital Communications - 1 - Question 10

Hartley's law can be defined as r = 2 Blog_{2} M . When compared to Shannon Hartley theorem, C, M are

Detailed Solution for Test: Digital Communications - 1 - Question 10

Test: Digital Communications - 1 - Question 11

The probability of a bit decoded correctly at receiver is `p'. If n bits are sent, what is the probability that one bit is decoded correctly?

Detailed Solution for Test: Digital Communications - 1 - Question 11

Test: Digital Communications - 1 - Question 12

A stationary random process x(t) has the following correlation function is constant) . Find the psd of random signal x(t).

Detailed Solution for Test: Digital Communications - 1 - Question 12

Test: Digital Communications - 1 - Question 13

If random variable 'x' has Gaussian pdf with mean M, then y=2x has PDF andmean respectively

Detailed Solution for Test: Digital Communications - 1 - Question 13

Test: Digital Communications - 1 - Question 14

If x has P.S.D S_{xx} (f), then y has P.S.D of ( Assume H(f) is the Fourier Transform

Detailed Solution for Test: Digital Communications - 1 - Question 14

Test: Digital Communications - 1 - Question 15

** **A Gaussian random variable 'x' has mean 1 and variance√2. If y = x^{2}, then the mean of y is

Detailed Solution for Test: Digital Communications - 1 - Question 15

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