Reg. No.
B.E. B.Tech. DEGREE EXAMINATION, MAY 2017
Fifth Semester
Information Technology
01UIT506 WIRELESS COMMUNICATION
(Regulation 2013)
Duration: Three hours Maximum: 100 Marks
Answer ALL Questions
PART A (10 x 2 20 Marks)
1. Differentiate cellular telephony and cordless telephony.
2. Define hand off.
3. Express simplified path loss as a function of distance used for system design.
4. What are Large-scale propagation models?
5. Mention all important effects of small-scale fading.
6. Define maximum excess delay of the power delay profile.
7. What are the applications of non linear equalizers?
8. Define Macroscopic diversity.
9. Write any three services by GSM.
10. State the use of cyclic prefix.
PART B x 16 80 Marks)
11. List a few examples of wireless communication systems and explain and compare any three in detail.
Question Paper Code: 31856
2
31856
Or Discuss briefly about the various methods for improving average and capacity in cellular systems.
12. Write a notes on radio wave propagation. Or Illustrate briefly about various empirical path loss models.
13. Discuss in detail about small-scale multipath measurements. Or Explain about the fading effects due to multipath time delay spread. Write short notes on Rayleigh and Ricean distributions.
14. Describe the need for algorithms in adaptive equalization. Compare ZF, LMS and RLS algorithms of adaptive equalization. Or Discuss in detail about RAKE receiver.
15. (Discuss about reverse CDMA channel. Or
Explain briefly about the classification of GSM logical channels. Describe call handling in AMPS and ITACS.