Download AKTU B-Tech 8th Sem 2014-15 EEC 801 Wireless And Mobile Communication Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 8th Semester (Eight Semester) 2014-15 EEC 801 Wireless And Mobile Communication Question Paper

Printed Pages : 4 _
LII JII! mm _|ll| mm mm
(Following Paper 1]) and Roll No. to be ?lled in yourAnswer Book)
PAPER ID : 131801
Roll No.
7 1B.? Tech.
{SEM. V111) THEORY EXAMINATION; 2014-15
_WIRELESS & MOBILE COMMUNICATION
Tune : 3 Hours] [Total Marks : 100
Note : Attempt all questiOns.
1 Attempt any four parts : 5X4=20
(a) Explain the term Evolution of mobile radio
, communication fundamentals.
(b) A transmitter has a powertoutput of 150 watt
at a carrier frequency of 32.5 MHz. It is
connected to an antenna with gain of 12 dBi.
The receiving antenna is 10 km away and has
gain of 5-dBi. Calculate the power delivered
to the. receiver, assuming free space
propagation. Assume also that there are no
losses or mismatches in the _system.
(3) De?ne the Brewster angle. Calculate the
Brewster angle for a sine wave imping on the
ground having a permittivity of gr: 4,
((1) Explain the term multipath measurement-
using relevant ?diagram.
131801] 1 [,Contd...

(e)
2 Attempt any four parts :
(a)
. (b)
(c)
(d)
(e)
3 Attempt any two parts
(a)
(b)
131801]
Explain the outdoor models given below :
(1) Durkin?s Modelv \
(ii)~ Okumura Model.
_ 5x4=20
Draw the block diagram of survey of
equalization and explain it.
Derive the impulse response model of multipath
channel. t '
What is the basic mechanism of vocoder and
explain any two types of vocoders. '
Explain the different type of equalization
. techniques used in wireless communication
with support of mathematics and block
diagram.
Explain the different type of diversity
techniques used in wireless communication
SYStem.
10x2=20
What are the different methods used for
improving coverage and capacity in cellular
system ? Describe all the method in detail with
support of ?gures.
De?ne frequency reuse concept; And explain
the di?'erent type of channel assignment
strategies and hand-off strategies in
communication system.
2 [ Contd...
(C)
Attempt any two parts of the
Given a cellular system with a total bandwidth
of 30 MHz which uses two 25 kHz simplex
channels to provide full duplex voice channels
and control channels. Assuming that system
uses a nine cell reuse pattern and 1 MHz of
the total bandwidth is allocated for control
channel 2' '
(i) Calculate the total available channel
, (ii) Determine the number of control channels
(iii) Determine the number of voice channels
per cells.
(iv) Discuss the strategies for distribution of
control and voice channels in each cell.
10X2=20
following : -
(a)
(b)
(c)
131801]
Describe the Forward CDMA channel and
reverse CDMA channel using proper block
diagram.
Explain the GSM architecture and frame
structure in mobile radio communiction using
system in detail.
A FDD cellular communication system uses a
total of 945 radio channels available for
handling tra?ic. The total area of entire system
is 2450 sqkm with the 7 sqkm as the area of
a cell :
(i) Calculate the system capacity if the
cluster size is 7.
(ii) Calculate the system capacity if the
cluster size is 4.
9
3 [Contd...

5 Attempt any two parts : lOXZ=20
00
(b)
?9
131801]
Why Next Generation Networks are
important ? Explain the Next Generation
N etwork in detail.
Explain Mobile Adhoc N etwork in wireless
communication and 'discuss any two
applications.
Write the short note on following :
' (i) Wireless standard IMT 2000
(ii) RAKE receiver.
4 [14450]