Introduction to Digital Communication Systems Quiz

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15 Questions

Which type of communication system can be classified based on its signal processors?

Digital

What is the function of an input transducer in a communication system?

Convert non-electrical information to electrical form for transmission

Which branch of communication engineering deals with the design and implementation of communication links?

Communication Systems

What is the primary purpose of a receiver in a communication system?

Amplify and demodulate the received signal

In which form does an input transducer convert the non-electrical information for transmission?

Electrical

What is the fundamental block diagram component of a basic communication system that converts non-electrical information to electrical form?

Transducer

What is the purpose of a transmitter in a communication system?

To convert input electrical information for efficient transmission over a given channel

How is channel defined in communication systems?

It is the medium through which information is sent

In analog communications, what do analog devices maintain?

Exact physical analog of information

What is the function of a digital communication system's source encoder?

To encode the digital signal into a shorter form

What is the main purpose of channel encoding in a digital communication system?

To add redundancy to correct errors caused by noise during transmission

What are the two main techniques used to reduce errors at the output of a digital communication system?

Forward Error Correction (FEC) and Automatic Repeat Request (ARQ)

How are FEC Channel codes classified?

Into Block Codes and Convolutional codes with Viterbi decoder

Which type of communications involve systems where relatively high-frequency analog carriers are modulated by relatively low-frequency digital information signals?

Digital Communications

What does a Digital-to-Analog Converter (DAC) do in a communication system?

Converts digital signals back into analog form

Study Notes

Classification of Communication Systems

  • A communication system can be classified based on its signal processors into analog, digital, or hybrid systems.

Input Transducer Function

  • The input transducer converts non-electrical information into an electrical signal for transmission.

Communication Engineering Branch

  • The branch of communication engineering that deals with the design and implementation of communication links is transmission engineering.

Receiver Purpose

  • The primary purpose of a receiver in a communication system is to convert the received electrical signal back into its original form.

Input Transducer Conversion

  • An input transducer converts non-electrical information into an electrical signal for transmission.

Basic Communication System Component

  • The input transducer is the fundamental block diagram component of a basic communication system that converts non-electrical information to electrical form.

Transmitter Purpose

  • The purpose of a transmitter in a communication system is to send the electrical signal over a communication channel.

Channel Definition

  • In communication systems, a channel is defined as the medium through which the electrical signal is sent from the transmitter to the receiver.

Analog Communications

  • In analog communications, analog devices maintain a continuous signal.

Source Encoder Function

  • In a digital communication system, the source encoder reduces the redundancy of the information signal to be transmitted.

Channel Encoding Purpose

  • The main purpose of channel encoding in a digital communication system is to add redundancy to the information signal for error detection and correction.

Error Reduction Techniques

  • The two main techniques used to reduce errors at the output of a digital communication system are Error Detection and Correction (EDC) and Forward Error Correction (FEC).

FEC Channel Codes

  • FEC Channel codes can be classified into Block codes and Convolutional codes.

Hybrid Communication Systems

  • Hybrid communication systems involve the modulation of relatively high-frequency analog carriers by relatively low-frequency digital information signals.

Digital-to-Analog Converter (DAC)

  • A Digital-to-Analog Converter (DAC) converts digital information signals into analog signals for transmission in a communication system.

Test your knowledge about the fundamental principles and performance criteria of digital communication systems. Explore topics such as block diagrams, signal processors, and the classification of communication systems as analog or digital.

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