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Here you can find syllabus and tutorial sheet of MOBILE & CELLULAR COMMUNICATION for 7th Semester BE ECE(Electronics and Communication Engg) in BIT Mesra. Please confirm from your department as these may change.

DEPARTMENT OF ELECTRONICS & COMM. ENGG.

B.I.T. MESRA, RANCHI

EC7113 MOBILE & CELLULAR COMMUNICATION

Module – 1:

Wireless Communication Systems & Standards:
Evolution of Mobile Radio Communications, Different generations (1G to 4G) of Cellular Networks, GSM, UMTS, GPRS, EDGE, Cellular telephone systems, WLAN, WLL, Bluetooth, PAN. (5)

Text Books:

1. "Wireless Communications: Principles and Practice" by T. S. Rappaport, Prentice Hall.
2. "Wireless Communication Technology" by Roy Blake, Thomson – Delmar.

Module – 2:

Propagation & Fading:
Propagation path loss, Free-space propagation model, Outdoor propagation models (Okumura model & Hata model), Indoor propagation models (Partition Losses in the same floor and between floors), Multipath fading, time dispersive and frequency dispersive channels, delay spread and coherence bandwidth, LCR and ADF. (8)
Text Books:

1. "Wireless Communication: Principles & Practice" by T.S. Rappaport, Prenctice Hall.
2. "Mobile Cellular Telecommunications Systems" by W. C. Y. Lee.

Module – 3:

Diversity & Combining Techniques:
Diversity Schemes (Space, frequency, field and polarization diversities) and combining techniques. (4)

Text Book:

"Wireless Communications: Principles and Practice" by T.S. Rappaport, Prentice Hall.

Module – 4:

Mobile Radio Interferences & System Capacity:
Co-channel Interference and System Capacity, Channel planning for Wireless Systems, Adjacent channel interferences, Power control for reducing interference, Near-end-to-far-end interference, Inter-symbol and Simulcast interference, False alarm rate and word error rate. (6)

Text Books:

1. "Wireless Communication: Principles & Practice" by T. S. Rappaport, Prenctice Hall.
2. "Mobile Cellular Telecommunications Systems" by W. C. Y. Lee.

Module – 5:

The Cellular Concept:
Frequency Assignment and Channel Assignment, Frequency Reuse, Handoff, Sectoring, Repeaters for range extension, Microcell zone, Spectral efficiency,
DS-SS, FH-SS. (6)

Text Books:

1. "Wireless Communication: Principles & Practice" by T. S. Rappaport, Prenctice Hall.
2. "Mobile Cellular Telecommunications Systems" by W. C. Y. Lee.

Module – 6:

Antenna Design Parameters:
Antennas used for Mobile Communications, Radiation patterns, Smart antenna (basic concept), Antenna location, Spacing and height in the base station and at the mobile unit. (4)

Text Books:

1. "Wireless Communication Technology" by Roy Blake, Thomson-Delmar
2. "Mobile Cellular Telecommunications Systems" by W. C. Y. Lee.

Module – 7:

Multiple Access Techniques:
FDMA, TDMA, CDMA, SDMA, OFDM, DS-CDMA, FH-CDMA, TH-CDMA, Capacity of Cellular Systems, Capacity of Cellular CDMA, WCDMA. (7)

Text Books:

1. "Wireless Communication: Principles & Practice" by T. S. Rappaport, Prenctice Hall.
2. "Mobile Cellular Telecommunications Systems" by W. C. Y. Lee.


TUTORIAL

EC 7113 MOBILE & CELLULAR COMMUNICATION

Module- 1:

1. Discuss the characteristic features of various generations of mobile communication systems.

2. Discuss the characteristics of GSM system.

3. Compare AMPS and ETACS systems.

4. Discuss standards of GSM systems.

5. Discuss the key requirement technologies for the 4G systems.

6. Enumerate the expectations from 4G mobile communication system

7. Explain the following Blue tooth, WLAN, , PAN

8. Discuss the following UMTS, 4G, GSM, IMT-2000, PCS

9. Explain the concept of OFDM, CDMA, QAM, GMSK.

Module - 2:

1. Calculate the fading frequency when one incoming wave is perpendicular to the vehicle motion.

2. A mobile unit is moving with a velocity V long a road between the transmitter and one scatter. Show that the received signal at the mobile unit form a standing wave.

3. What is the difference between mobile path and radio path?

4. What do you mean by signal fading? Define long-term fading and short term fading.

5. What are the causes of long-term fading and short term fading?

6. A mobile unit is moving with a velocity V in absence of any scatterer, Derive the expression for Doppler frequency and received frequency.

7. A mobile unit is receiving two incoming reflected waves of equal amplitudes at angles ? = 00 and ? = ?10. Derive the expression for fading frequency.

8. Obtain the general formula for fading frequency for two incoming waves at angles ?1 and ?2 w.r.t. the motion of the vehicle.

9. Define the appropriate PDFs, which represent long-term fading and short-term fading.

10. Define level-crossing rate (ler) and average and duration of fade (adf).

11. Explain the term 'Coherence bandwidth'.

12. What is the delay spread?

13. What do you mean by the statement- 'The mobile radio signal can be assume to be an ergodic process.'?

14. Explain the terms: (a) Time selective fading (b) frequency selective fading.

15. What do you understand by multipath fading? Discuss short term and long term fading.

16. What are those factors that affect small scale fading?

17. What effects multipath creates on received signal?

18. How will you represent the field strength of a mobile signal?

19. Discuss time domain and space domain representation of mobile signals.

20. Derive an expression for the propagation path loss in an open space.

21. How do you differentiate between the propagation path loss in open space and in mobile wireless environment?

22. What are the factors on which the propagation path loss depends in mobile environment?

23. Discuss mobile radio environment.

24. Explain Rayleigh PDF and Rician PDF.

25. Explain the terms radio horizon and differentiate between mobile path and radio path.

26. Explain with suitable example delay spread, coherence bandwidth, coherence time.

27. Discuss two ray ground reflection model.

28. Discuss knife edge diffraction model.

29. Explain the advantage and disadvantage of two ray ground reflection model in the analysis of path loss.

30. Name different PDFs to describe the mobile radio environment.

31. Discuss Log normal PDF.

32. Discuss the relevance of Rayleigh PDF in mobile communication environment.

33. Derive an expression for the Rayleigh PDF

34. How do you differentiate between Rayleigh and Rician PDFs?

35. What do you mean be fading channels?

36. Explain the basic mechanism of signal propagation in mobile radio environment.

37. What do you mean by dispersive and non dispersive channels?

38. Explain the characteristics of time dispersive channel?

39. Explain the various types of averages used in statistical communications theory.

40. Explain the term ergodic process with the help of a suitable example.

41. Differentiate between small scale and large scale fading.

42. Name various propagation models used to describe small scale and large scale fading.

43. Explain Durkin's model in detail.

44. What do you mean by partition losses?

45. Explain the propagation models that take onto consideration the partition losses.

46. Explain Longely rice model, Okumura and Hata model, long distance path loss model. Attenuation factor model.

47. What should be the propagation frequency in order to form a multipath propagation medium?

48. Generally no radio horizon needed to be considered in base to mobile link. Why?

49. What are the considerations for outdoor and indoor propagation models?

50. Explain Clarks model in detail

51. Discuss various situations in which multipath occurs and explain one of the situation in detail.

52. Describe max excess delay, mean delay and delay spread with suitable examples.

53. What do you mean by coherence bandwidth? How it is related with delay spread?

54. Name various outdoor propagation model and explain one of them.

55. What is coherence band width? What is its effect with reference to the channel bandwidth?

Module – 3:

1. Discuss the advantages of space diversity antennas used at cell site.

2. Explain the space diversity and frequency diversity. Explain the advantages and disadvantages of major combining techniques used in mobile communication.

3. Name various microscopic diversity schemes and explain them

4. Explain why physically the space diversity scheme requires larger antenna separation in the base station but smaller antenna separation at the mobile unit.

5. What do you mean by diversity reception? Discuss various diversity schemes.

6. Discuss various combining techniques

7. Explain the advantage and disadvantage of major combining techniques used in mobile Communications.

Module- 4:

1. Discuss co channel channel interference.

2. Explain the methods to reduce the co channel interference

3. Explain the significance of the term 'co-channel reduction factor'.

4. What is adjacent- channel interference?

5. Explain (i) Inter symbolic interference (ii) Simulcast Interference (iii) Noise in mobile environment

6. What is near end to far end interference ratio/ how can you reduce it?

7. Explain noise limited and interference limited environments.

Module- 5:

1. Discuss in detail the concept of frequency reuse.

2. Explain cellular concept. What is hand-off in cellular communication? What do you mean by channel efficiency?

3. Discuss the operation of a cellular system.

4. Explain the functioning of MTSO and BSC

5. Discuss the concept of hand off in mobile communication.

6. What are hard hand off and soft hand off?

7. Why CDMA is able to achieve soft hand off?

8. Differentiate between channel sharing and channel borrowing.

9. Discuss various channel assignment strategies.

10. Discuss various schemes to improve spectral efficiency.

11. Discuss multiple channel bandwidth system.

12. Discuss one third channel offset scheme.

13. Discuss different types of co channel assignments.

14. Discuss constant minimum C/I for all channels assignment strategy.

15. Discuss different minimum C/I among all channels assignment strategy.

16. Discuss the mechanism to improve coverage and capacity of a cellular system.

17. Explain why the co channel interference is reduced in one third offset channel offset scheme?

18. Explain the conditions in which hand off should be delayed?

19. Discuss the features of micro cell.

20. Discuss the advantage of using CDMA in cellular system.

21. Discuss the key elements of designing a cellular system.

22. Discuss the various channel assignment strategies in mobile communication systems.

23. Discuss channel efficiency and spectral efficiency.

24. Describe hand off procedure in mobile communication. Differentiate between hard hand off and soft hand off.

25. Draw the frequency reuse cell pattern with reuse factor of 3.

26. Explain the mechanism of inter cell handover of a mobile station.

27. What are the frequency bands used for cellular mobile communications?

28. What is the role of mobile services switching centre?

29. What is cell splitting?

30. Explain (i) channel sharing (ii) channel borrowing (iii) underlay/ overlay.

31. Discuss the Key elements in designing cellular system

32. Discuss Microcell system design

Module – 6:

1. Explain why a vertically polarized wave is preferred over a Horizontal polarized wave for a mobile radio communication.

2. Why is the antenna separation at the base station wider when the antenna height is higher?

3. Explain why the vertical separation of two diversity antennas is not desired.

4. Write short notes on:
• Antennas for mobile unit
• Features of cell site antennas

5. Show that the received signal in a mobile radio environment is a constant, independent of the directivity of the directional antenna.

Module- 7:

1. Explain the concept of spread spectrum system. What are the characteristics of spread spectrum system?

2. Enumerate various kinds of spreading techniques.

3. Explain how frequency hopped spread spectrum technique is used in mobile radio communication system.

4. Explain what you understand by multiple accesses. What are FDMA and CDMA?

5. Discuss frequency hopping and explain frequency hop pattern.

6. Explain direct sequence spread spectrum technique.

7. With the help of block diagram discuss the transmitter and receiver of
DS-SS system.

8. Discuss advantage of spread spectrum techniques.

9. Discuss the natural attributes of CDMA.

10. Explain the channel architecture of a CDMA system

11. State the advantage and disadvantage of CDMA.

12. Explain the channel architecture of a TDMA system

13. State the advantage and disadvantage of TDMA.

14. Write a note on any CDMA standard.

15. What is the advantage of using frequency hopping in fading channel?

16. Discuss the capacity of a cellular CDMA system.

17. Comment on the capacity of cellular systems.
 
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