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Total No. of Questions : 06
Total No. of Printed Pages : 03
ES-193-A
B.Tech. (Reg./ATKT) Examination, 2024
(Fifth Semester)
ELECTRONICS AND COMMUNICATION ENGG.
Paper-EL-505
Mobile Communication and Networks
Time : 3 Hours]
[Maximum Marks : 60
Note : Q. No. 1 is compulsory. Attempt any two parts from remaining questions.
1.
Write short answers : 5Ã2=10
(a)
What is handoff and what are it's types ?
(b)
Define Diffraction and scattering related to signal propagation.
(c)
What is the major difference between CDMA and SDMA ?
(d)
What is the need of equalization at the receiver side ?
(e)
What is the basic technological difference between GSM and GPRS ?
2.
(a)
Explain cell splitting and microcell applications in network planning. Describe permanent and dynamic cell splitting techniques.
(b)
Discuss the technology advancements from first to fifth generation in cellular system.
(c)
Explain the concept of frequency reuse, frequency reuse factor and reuse distance. What is the role of cell structure in Frequency reuse ?
3.
(a)
Discuss different factors which results in mobile radio propagation path loss.
(b)
Quantitatively evaluate multipath fading due to scattering. What is doppler frequency ?
(c)
Define coherence bandwidth and compute it with channel impulse response model.
4.
(a)
Discuss the capacity of flat and frequency selective fading channels.
(b)
List and compare different multiple access schemes.
(c)
Describe the QPSK modulation scheme and compare it with QAM Scheme.
5.
(a)
Discuss the working of RAKE receiver and explain how it helps in counter the effect of multipath Fading ?
(b)
Describe different types of equalization techniques.
(c)
Explain, how transmit diversity is achieved in radio communication ?
6.
Write short notes on any two of the following :
(a)
MIMO
(b)
GSM
(c)
WCDMA.