Home > Wireless > Quizzes > Wireless Communication Systems Practice Test: Modulation Techniques for Mobile Radio
Wireless Communication Systems Practice Test: Modulation Techniques for Mobile Radio
Fast practice, instant feedback. Timer auto-submits when time’s up.
Avg score: 20% • Most missed: “Which of the following is specified by a specific number of bit errors occurring…”
Modulation reduces the size of the antenna and attracts low attention.  Some modulation techniques for mobile radio are: Frequency modulation (FM): A popular analog modulation technique used in mobile communications systems. In FM, the amplitude of the modulating carrier is kept constant while its frequency is varied by the modulating message signal. Amplitude modulation (AM): A modulation technique that is used in electronic communication. It is most commonly used for transmitting messages with a radio carrier wave. Quadrature amplitude modulation (QAM): A form of modulation widely used... Show more
Wireless Communication Systems Practice Test: Modulation Techniques for Mobile Radio
Time left 00:00
25 Questions

1. Who was the first to solve the problem of ISI?
2. The bandwidth efficiency of an M-ary FSK signal ________ with ________ in M.
3. FM bandwidth is approximated using _______ rule.
4. In angle modulation, signal to noise ratio before detection is a function of ______
5. Which of the following is not a characteristic of PN sequence?
6. In comparison to M-ary PSK, M-ary QAM bandwidth efficiency is _____ and power efficiency is ________
7. Which of the following FM demodulator is sometimes known as pulse averaging discriminator?
8. Which of the following is true for a Gaussian filter?
9. BPSK uses non-coherent demodulator.
10. QPSK signals perform better than OQPSK in the presence of phase jitter.
11. M-ary signalling techniques are not sensitive to timing jitters.
12. In M-ary PSK, the carrier ___________ takes one of M possible values.
13. _______ is equal to width of main spectral lobe.
14. PN sequence can be generated using sequential logic circuits.
15. Frequency modulation index defines the relationship between the ______ and bandwidth of transmitted signal.
16. A product detector in AM systems is also called ___________
17. Raised cosine filter does not satisfy Nyquist criteria.
18. In digital communication system, in order to increase noise immunity, it is necessary to increase _________
19. In non-linear modulation, the amplitude of the carrier varies with the variation of modulating signal.
20. Which of the following are two most important classes of angle modulation?
21. If the peak message signal amplitude is half the peak amplitude of the carrier signal, the signal is _____ modulated.
22. FM signals have all their information in ______ of the carrier.
23. Why spread spectrum technique is inefficient for a single user?
24. Why is pulse shaping technique used?
25. QPSK provides twice the bandwidth efficiency and _______ energy efficiency as compared to BPSK.

⚡ Recently practiced quizzes in this topic
Live quiz activity
Wireless Communication Systems Practice Test: Multiple Access Techniques Wireless Network Security Wireless Communication Systems Practice Test: Large - Scale Path Loss Wireless Communication Systems Practice Test: Wireless Systems & Standards Wireless Communication Systems Practice Test: Speech Coding Wireless And Mobile Networks Wireless Mobile Computing And M- Commerce Wired And Wireless Networks SkillsUSA Mobile Electronics Installation Knowledge Performance Study Guide Wireless Networking Vocab
 
❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

🌈  Our mission is to help improve your scores in any subject and exam withonline quizzes, practice tests, study guides, & advice for students. Since 2018.
About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know?
Privacy | Terms |
Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.