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Digital Communication Systems: Introduction and Performance Criteria

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Digital Communication Systems: Introduction and Performance Criteria

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Questions and Answers

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

Routes the transmitted signal to the desired destination

Converts electrical information to non-electrical form

Converts non-electrical information to electrical form (correct)

Processes the received signal to minimize errors

In digital communication systems, what is the main advantage over analog communication systems?

Limited flexibility in signal processing

Easier implementation of error correction (correct)

Higher sensitivity to noise

Lower information capacity

What is the function of a receiver in a communication system?

Routes the transmitted signal to the desired destination

Processes the received signal to minimize errors (correct)

Converts electrical information to non-electrical form

Converts non-electrical information to electrical form

What is the primary role of a transducer in a communication system?

Convert non-electrical information to electrical form (C) Signup and view all the answers

What does SNR vs BER stand for in the context of digital communication systems?

Signal-to-Noise Ratio vs Bit Error Rate (D) Signup and view all the answers

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

To make input electrical information suitable for efficient transmission over a given channel (D) Signup and view all the answers

How can analog communications be classified based on signal processors?

By maintaining the exact physical analog of information (B) Signup and view all the answers

What is the main function of a channel encoder in a digital communication system?

To add redundancy to the coded digital signal to correct errors caused by channel noise (A) Signup and view all the answers

What is the role of a source encoder in a digital communication system?

To reduce the redundancy and increase transmission speed of the digital signal (C) Signup and view all the answers

What is the purpose of Automatic Repeat Request (ARQ) and Forward Error Correction (FEC) in a digital communication system?

To reduce errors caused by channel noise and interference during transmission (A) Signup and view all the answers