Test: Digital Communications - 1

Question 1

has P.S.D. S_xx f then y has P.S.D

Accepted Answer

Answer

Answer

Sxx f

Answer

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

Accepted Answer

Answer

Answer

Answer

Question 3

Consider a random process x(t). Which of the following can represent R_x. (r)?

Accepted Answer

Answer

Answer

Answer

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 ___________________

Accepted Answer

Question 5

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

Accepted Answer

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.

Accepted Answer

None of these

Answer

8

Answer

7

Answer

6

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?

Accepted Answer

10 times Nyquist rate

Answer

20 times Nyquist rate

Answer

5 times Nyquist rate

Answer

40 times Nyquist rate

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.

Accepted Answer

15 bits/sec

Answer

10 bits/sec

Answer

20 bits/sec

Answer

25 bits/sec

Question 9

Probability of picking 3 symbols are P₀, P₁ and P₂ respectively. The maximum entropy is achieved, when P₀, P₁, P₂ are

Accepted Answer

Answer

Answer

Answer

0, 1,0

Question 10

Hartley's law can be defined as r = 2 Blog₂ M . When compared to Shannon Hartley theorem, C, M are

Accepted Answer

Answer

Answer

Answer

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?

Accepted Answer

Answer

Answer

Answer

Question 12

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

Accepted Answer

Answer

Answer

Answer

Question 13

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

Accepted Answer

Gaussian, 2M

Answer

Rayleigh, 2M

Answer

Rayleigh, 4M

Answer

Gaussian, 4M

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

Accepted Answer

Answer

Answer

S_xx (f)

Answer

Question 15

A Gaussian random variable 'x' has mean 1 and variance√2. If y = x², then the mean of y is

Accepted Answer

2.414

Answer

1.414

Answer

1

Answer

-1

GATE ECE (Electronics) Test: Digital Communications - 1 Free Online Test

MCQ Practice Test & Solutions: Test: Digital Communications - 1 (15 Questions)

has P.S.D. S_xx f then y has P.S.D

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

Consider a random process x(t). Which of the following can represent R_x. (r)?

It is required to transmit at 100 Kbit/s and a bandwidth of 2 MHz is used. The
minimum S/N ratio is ___________________

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

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.

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?

The probability of the five possible outcomes of an experiment are given as
Determine the informationrate, if there are 8 outcomes per second.

Probability of picking 3 symbols are P₀, P₁ and P₂ respectively. The maximum entropy is achieved, when P₀, P₁, P₂ are

Hartley's law can be defined as r = 2 Blog₂ M . When compared to Shannon Hartley theorem, C, M are

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?

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

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

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

A Gaussian random variable 'x' has mean 1 and variance√2. If y = x², then the mean of y is

GATE ECE (Electronics) Mock Test Series 2027

GATE ECE (Electronics) Mock Test Series 2027

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GATE ECE (Electronics) Test: Digital Communications - 1 Free Online Test

MCQ Practice Test & Solutions: Test: Digital Communications - 1 (15 Questions)

has P.S.D. Sxx f then y has P.S.D

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

Consider a random process x(t). Which of the following can represent Rx. (r)?

It is required to transmit at 100 Kbit/s and a bandwidth of 2 MHz is used. Theminimum S/N ratio is ___________________

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

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.

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?

The probability of the five possible outcomes of an experiment are given asDetermine the informationrate, if there are 8 outcomes per second.

Probability of picking 3 symbols are P0, P1 and P2 respectively. The maximum entropy is achieved, when P0, P1, P2 are

Hartley's law can be defined as r = 2 Blog2 M . When compared to Shannon Hartley theorem, C, M are

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?

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

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

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

A Gaussian random variable 'x' has mean 1 and variance√2. If y = x2, then the mean of y is

GATE ECE (Electronics) Mock Test Series 2027

GATE ECE (Electronics) Mock Test Series 2027

Top Courses for Electronics and Communication Engineering (ECE)

About this Electronics and Communication Engineering (ECE) Practice Test

Explore more Electronics and Communication Engineering (ECE) Study Resources

has P.S.D. S_xx f then y has P.S.D

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

Consider a random process x(t). Which of the following can represent R_x. (r)?

It is required to transmit at 100 Kbit/s and a bandwidth of 2 MHz is used. The
minimum S/N ratio is ___________________

The probability of the five possible outcomes of an experiment are given as
Determine the informationrate, if there are 8 outcomes per second.

Probability of picking 3 symbols are P₀, P₁ and P₂ respectively. The maximum entropy is achieved, when P₀, P₁, P₂ are

Hartley's law can be defined as r = 2 Blog₂ M . When compared to Shannon Hartley theorem, C, M are

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

A Gaussian random variable 'x' has mean 1 and variance√2. If y = x², then the mean of y is