Exploring Digital Communications Concepts

Exploring Digital Communications Concepts

University

20 Qs

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Exploring Digital Communications Concepts

Exploring Digital Communications Concepts

Assessment

Quiz

Education

University

Practice Problem

Easy

Created by

Srinivasarao Kandula

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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is quantization in digital communications?

Quantization refers to the method of encoding data into binary format without any loss.

Quantization is the technique used to increase the bandwidth of a signal.

Quantization is the process of converting continuous signals into discrete values for digital representation.

Quantization is the process of amplifying weak signals for better transmission.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Explain the difference between uniform and non-uniform quantization techniques.

Uniform quantization uses equal intervals for quantization, while non-uniform quantization uses variable intervals based on input value distribution.

Uniform quantization is faster than non-uniform quantization.

Non-uniform quantization uses fixed intervals for quantization.

Uniform quantization is only used in audio processing.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the Sampling Theorem state about signal sampling?

A signal can be perfectly reconstructed from its samples if sampled at a rate greater than twice its highest frequency.

A signal cannot be reconstructed if sampled below its highest frequency.

Sampling a signal at its highest frequency is sufficient for reconstruction.

A signal can be reconstructed from its samples at any sampling rate.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define Nyquist rate and its significance in sampling.

The Nyquist rate is irrelevant in digital signal processing.

The Nyquist rate is twice the highest frequency of a signal, crucial for preventing aliasing in sampling.

The Nyquist rate is half the sampling frequency.

The Nyquist rate is the highest frequency of a signal.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

List the main components of a Pulse Code Modulation (PCM) system.

Modulator

Digital Signal Input

Analog Signal Output

The main components of a Pulse Code Modulation (PCM) system are: Analog Signal Input, Sampler, Quantizer, Encoder, Decoder, Digital-to-Analog Converter (DAC), and Output Signal.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What role does the quantizer play in a PCM system?

The quantizer converts continuous signal amplitudes into discrete values in a PCM system.

The quantizer filters out noise from the signal in a PCM system.

The quantizer encodes the signal into binary format directly.

The quantizer amplifies the signal in a PCM system.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Describe the process of encoding in PCM.

The process of encoding in PCM involves sampling, quantization, and binary encoding of the analog signal.

The encoding process in PCM is limited to converting digital signals to analog.

PCM encoding requires only quantization without binary encoding.

The process of encoding in PCM involves only sampling the analog signal.

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