Digital Communication MCQ Questions & Answers | ECE

Consider a binary digital communication system with equally likely 0's and 1's. When binary 0 is transmitted the detector input can lie between the levels -0.25 V and +0.25 V with equal probability: when binary 1 is transmitted, the voltage at the detector can have any value between 0 and 1 V with equal probability. If the detector has a threshold of 0.2 V (i.e., if the received signal is greater than 0.2 V, the bit is taken as 1), the average bit error bit error probability is

Which of the following is worst affected by Noise?

Which type of encoding is used in USB?

Which of the following pulse modulation are digital?
1. PCM
2. Differential PCM
3. PWM
Select the correct answer using the options given below:

The Nyquist sampling rate for the signal $$s\left( t \right) = \frac{{\sin \left( {500\pi t} \right)}}{{\pi t}} \times \frac{{\sin \left( {700\pi t} \right)}}{{\pi t}}$$      is given by

The granular noise can be reduced by

Match List-I with List-II and select the correct answer as per the options:

List-I	List-II
a. RF band is divided into small frequency bands	1. TDMA
b. Store and forward system	2. FDMA
c. Spread spectrum multiple access	3. Navigation technique
d. Dead reckoning	4. CDMA

In a band limited channel higher bit rate can be transmitted with

A message signal with its amplitude uniformly distributed between -2 V and +2 V is transmitted by a 8-bit binary PCM system. The (SNR)_q would be

The bit error probability for GMSK is given by