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Welcome to the Modulation Techniques for Mobile Radio MCQs Page

Dive deep into the fascinating world of Modulation Techniques for Mobile Radio with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Modulation Techniques for Mobile Radio, a crucial aspect of Wireless and Mobile Communications. In this section, you will encounter a diverse range of MCQs that cover various aspects of Modulation Techniques for Mobile Radio, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Wireless and Mobile Communications.

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Check out the MCQs below to embark on an enriching journey through Modulation Techniques for Mobile Radio. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Wireless and Mobile Communications.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Modulation Techniques for Mobile Radio. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Modulation Techniques for Mobile Radio MCQs | Page 11 of 14

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Q101.
In M-ary PSK, the carrier ___________ takes one of M possible values.

a.

Amplitude

b.

Frequency

c.

Angle

d.

Phase

Discuss
Answer: (d).Phase
Q102.
The constellation of M-ary PSK is ____________ dimensional.

a.

One

b.

Does not exist

c.

Two

d.

Three

Discuss
Answer: (c).Two
Q103.
What is the radius of the circle in M-ary PSK on which message points are equaly spaced?

a.

√Eₛ

b.

√Eb

c.

Eb

d.

Eₛ

Discuss
Answer: (a).√Eₛ
Q104.
As the value of M _________ the bandwidth efficiency ________

a.

Increases, same.

b.

Increases, decreases

c.

Increases, increases

d.

Decreases, same

Discuss
Answer: (c).Increases, increases
Q105.
The power efficiency of the M ary PSK decreases because of the _____

a.

Freely packed constellation

b.

Increment of bandwidth efficiency

c.

Fixed null bandwidth

d.

Densely packed constellation

Discuss
Answer: (d).Densely packed constellation
Q106.
In QAM, the amplitude is _______ and phase is _______

a.

Varied, constant

b.

Varied, varied

c.

Constant, varied

d.

Constant, constant

Discuss
Answer: (b).Varied, varied
Q107.
M-ary QAM signal have constant energy per symbol.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q108.
In comparison to M-ary PSK, M-ary QAM bandwidth efficiency is _____ and power efficiency is ________

a.

Identical, superior

b.

Less, superior

c.

Identical, identical

d.

Superior, superior

Discuss
Answer: (a).Identical, superior
Q109.
The bandwidth efficiency of an M-ary FSK signal ________ with ________ in M.

a.

Constant, increase

b.

Increases, increase

c.

Decreases, increase

d.

Decreases, decrease

Discuss
Answer: (c).Decreases, increase
Q110.
Power efficiency of M-ary FSK increases, since _________

a.

Constellation is densely packed

b.

M signals are non-orthogonal

c.

Fixed null bandwidth

d.

M-signals are orthogonal

Discuss
Answer: (d).M-signals are orthogonal
Page 11 of 14

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