Digital Communication MCQ Questions & Answers | ECE

A. 1 - (1 - p)ⁿ

B. p + (n - 1) (1 - p)

C. np(1 - p)^{n - 1}

D. (1 - p)ⁿ + np(1 - p)^{n - 1}

A. Dynamic range of the siqnal

B. Sampling rate

C. Number of quantizing levels

D. Power spectrum of signal

A. Lower frequency components only

B. Higher frequency components only

C. Lower amplitudes only

D. Higher amplitudes only

A. A coherent carrier is not required to be generated at the receiver

B. For a given energy per bit, the probability of error is less

C. The 180° phase shifts of the carrier are unimportant

D. More protection is provided against impulse noise

A. 0.15

B. 0.2

C. 0.05

D. 0.5

A. B₁ = 20 kHz, B₂ = 20 kHz

B. B₁ = 10 kHz, B₂ = 20 kHz

C. B₁ = 20 kHz, B₂ = 10 kHz

D. B₁ = 10 kHz, B₂= 10 kHz

A. 4-QAM

B. 16-PSK

C. Walsh-Hadamard orthogonal codes

D. Gaussian Minimum Shift Keying (GMSK)

A. p³ + 3p² (1- p)

B. p³

C. (1 - p)³

D. p³ + p² (1 - p)

A. Depends upon the sampling frequency employed

B. Is independent of the value of 'n'

C. Increasing with increasing value of 'n'

D. Decreases with the increasing value of 'n'

A. The sum of message signal sample with its prediction is quantized

B. The message signal sample is directly quantized, and its prediction is not used

C. The difference of message signal sample and a random signal is quantized

D. The difference of message signal sample with its prediction is quantized