SRM University 2007 B.Tech Electronics and Communications Engineering Bank : Wireless Communication - Question Paper

SRM UNIVERSITY
School of Electronics & Communication Engineering
ques. Bank
Subject Code : EC400
Subject Name : Wireless Communication
Year & Semester : IV Year B.Tech, VIII Sem.

UNIT-I
PART- A

1) Write few 1st generation wireless systems.
2) Write few 2nd generation wireless systems.
3) Write short notes on AMPS.
4) Write short notes on GSM.
5) List the advantages of digital cellular system standards.
6) What is Wireless Local Loop?
7) Write short notes on Paging System
8) Write short notes on Cardless phone system.
9) What is Full Duplex system?
10) What is meant by Handoff?
11) Define FDD.
12) Define TDD
13) List the differences ranging from FDD and TDD.
14) List the functions of MSC.
15) Define Roaming in cellular system.
16) What is Forward Channel?
17) What is Reverse Channel?
18) List the functions of Base station.
19) Write short notes on IS_95 or CDMA standard.
20) Write short notes on USDC.
21) List the mobile radio standards of U.S.
22) List the mobile radio standards of European Countries.



PART-B

1) Explain the Evolution of cellular System in detail.
2) Write short notes on i) 1st ii) 2nd ,iii) Thiord Genaration mobile Radio standards.

3) Write in detail about
a) Paging System b) Cordless Telephone system c )WLL
4) Write in detail about
a) AMPs b) GSM c )IS_95(CDMA)
5) Explain in detail about how a call initiated by a mobile subscriber to a a different mobile subscriber is established with the help of timing diagram.
6) Explain in detail about how a call initiated by a landline subscriber to a mobile subscriber is established with the help of timing diagram.

UNIT – II
PART – A

1. Define Cell.
2. Draw a cell cluster having a size of seven.
3. Define Co-Channel
4. Write few kinds of channel assignment strategies available.
5. Define Handoff.
6. What is MAHO?
7. What is cell dragging?
8. Differentiate soft and hard handoff.
9. Write kinds of interference.
10. What are the impairments created by interference?
11. What is co-channel reuse ratio?
12. What are the uses of power control?
13. What is trunking?
14. What is grade of service?
15. Write Erlang B formula.
16. Write Erlang C Formula.
17. What is cell splitting?
18. What is the traffic intensity per use if on avg. every user has 2 calls per hour and avg. duration of call is 4 minutes?
19. What is dwell time?
20. Define call set up time.
21. Define Blocked call or lost call .
22. Define Holding Time.
23. Define Traffic Intensity.
24. List the kinds of trunked system.
25. Define Blocked Calls Cleared Trunking System.
26. Define Blocked Calls Delayed Trunking System.
27. Write the formula relating holding time and traffic intensity per user.
28. Write the equations for total offered traffic intensity and traffic intensity per channel relating holding time and traffic intensity per user.

Earning:   Approval pending.