EC2401 Wireless Communication B.E Question Bank : dmice.ac.in

Name of the College : DMI College OF Engineering
Department : Electronics & Communication Engineering
Subject Name : EC2401 & Wireless Communication
Degree : B.E
Sem : IV & VII
Website : dmice.ac.in
Document Type : Question Bank

Wireless Communication : https://www.pdfquestion.in/uploads/dmice.ac.in/2773-EC2401.doc

DMI Wireless Communication Question Paper

UNIT- I

(PART A TWO MARKS QUESTIONS) :
1. What are the different types of multiple Access schemes?
2. Write some examples for wireless communication system.
3. Mention the significance of frequency reuse in cellular networks.
4. What is flat fading?

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5. Define signal to self interference ratio.
6. State the operating principle of adhoc network.
7. Differentiate cellular telephony and cordless telephony.
8. When does a WLAN become a PAN?
9. What are three most important effects of small-scale multipath propagation?
10. What is a multiple access technique?

11. What do you mean by forward and reverse channel?
12. Define cell.
13. What is foot print?
14. What is co channel interference?
15. Define cell splitting.
16. What is sectoring?
17. Define Dwell time.
18. Write the formula for co-channel reuse ratio
19. What is fixed channel assignment?
20. What is dynamic channel assignment?

(PART B 16 MARKS QUESTIONS) :
1. Discuss the types of services requirements, spectrum limitations and noise considerations of wireless network.
2. Explain the principle of cellular networks and various types of hand of techniques.
3. Explain in detail wide area data services and broadband wireless access services offered to wireless networks.
4. (i)Write a note on noise and interference limited systems.(10)
(ii)A Communication system has the following parameters: Pt=5w, Gt=13dB, Gr=17dB, d=80km, f=3 GHz .Find the received power.(6)
5. (i)Explain about the factors that influence small scale fading.(6)
(ii)Describe in detail about the various types of services in wireless communication system.(10)
6. Explain the methods for increasing the capacity of wireless cellular networks.
7. Brief about the principle of TDMA & FDMA.
8. Brief about the principle of DSMA & SDMA.
9. Describe in detail about the effects of multipath propagation in wireless environment.
10. Compare and contrast wired and wireless communication.

UNIT- II

WIRELESS PROPAGATION CHANNELS :
(PART A TWO MARKS QUESTIONS) :
1. List the different types of wireless channels.
2. What is the frequency selective fading? How to avoid fading problem?
3. Distinguish between narrowband and wideband systems.
4. What is Link Budget Calculation?
5. State the differences between small-scale fading and large scale fading.
6. Define: Snell’s law.
7. What is propagation model?
8. Define EIRP.
9. Explain path loss.
10. What is free space propagation model?
11. What is scattering?
12. Define Doppler shift.
13. Define fast fading channel.
14. Define slow fading channel.
15. What are the propagation mechanisms of EM waves?
16. What do you mean by WSSUS channels?
17. What are merits and demerits of Okumara’s model?
18. List the advantages and disadvantages of Hata model.
19. Define coherence time, coherence bandwidth.
20. What is the necessity of Link budget?
(PART B 16 MARKS QUESTIONS) :
1. Briefly explain the three basic propagation mechanisms which impact propagation in a mobile communication system
2. (i) Explain the free space path loss model and free space propagationmodel.
(ii)Describe two ray model propagation mechanisms.
3. (i)Explain the time variant two path model of a wireless propagation channel.(8)
(ii) Describe any two methods of diffraction by multiple screens. (8)
4. (i)What is reflection? Explain in detail the reflection from dielectric and conductors.(8)
(ii)Write short notes on diffraction and scattering. (8)
5. (i)What is Brewster angle? Calculate the Brewster angle for a wave impinging on ground having a permittivity of 4.(8)
(ii)Brief about the properties of Rayleigh distribution. (8)
6. What is the need of link calculation? Explain with suitable example.
7. With system theoretic description, explain the characteristics of time-dispersive channels.
8. Discuss in detail about Channel classification.
9. (i)Discuss about ultra wide band channel.(8)
(ii)Compare coherence bandwidth and coherence time. (8)
10. Discuss the mathematical formulation for narrow band and wide band system with relevant figures.