Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 8th Semester (Eight Semester) 2018-19 NEC801 Wireless Mobile Communication Question Paper
NEC801
Printed Pages: 02 Sub Code: NEC801
Paperld: RouNo.| | | | | | | | | | |
B TECH
(SEM-VIII) THEORY EXAMINATION, 2018-19
WIRELESS & MOBILE COMMUNICATION
T ime.? 3H0urs T oral Marks: 100
Note: Attempt all Section. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief 2x10=20
(a) What are the main reasons for path losses?
(b) If I = 3 and J=0, what is the cluster size in cellular system.
(c) What is the basic work of base station in mobile communication?
((1) Write the advantage of hand ?0ff.
(e) What are the components of Next Generation Networks?
(f) Calculate the spectral efficiency if the bandwidth is 684 kbps and
transmission data rate is 1.152 Mbps
(g) What are the three main wireless technologies?
(h) What is the reason behind the name ?Bluetooth??
(i)Why we are using Equalization in wireless communication?
(j)What are the advantage of 4G system.
SECTION-B
2 Attempt any three of the following 10x3=30
(a) A transmitter has a power output of 150 watt at a carrier frequency of 32.5
MHZ. It is connected of a to an antenna with gain of 12 dBi. The receiving
antenna is 10 km away and has gain of 5 dBi. There is Negligible losses or
mismatched. Calculate the power delivered to the receiver, assuming free space
propagation.
(b) What is frequency reuse concept? And describe the hand off strategies in
wireless communication.
(c) What are the different type of vocoder and describe direct sequence spread
spectrum.
((1) Explain adaptive equalization and decision feedback equalizer.
(e) Explain the term Long Term Evolution in wireless communication.
SECTION C
3 Attempt any one parts of the following. (10x1=10)
(a) Explain the different outdoor models are given below:
(i) Hata path loss Model
(ii) Okumura Model.
(b) Explain the term Evolution of mobile radio communication fundamentals
and describe the operation of cellular system.
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NEC801
4 Attempt any one parts of the following. (10x1=10)
(a) Explain the different type of diversity technique used in wireless
communication system.
(b) Explain the multiplexing in MIMO System.
5. Attempt any one parts of the following. (10x1=10)
(a) Draw and explain RAKE receiver using block diagram.
(b) Explain the different type of multiple access schemes (TDMA, CDMA and
FDMA)
6. Attempt any one parts of the following. (10x1=10)
(a) Draw the GSM architecture and also explain radio subsystem in mobile radio
communication.
(b) Describe the following wireless standards:
(1') IS 95 (ii) IMT 2000
7. Attempt any one parts of the following. (10x1=10)
(a) What is 4G system? And explain the concept of Next Generation Networks
(b) Describe challenges and issues in Mobile AD?HOC Networks (MANETs) in
wireless communication
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This post was last modified on 30 January 2020