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Roll No………..
Total No. of
Questions: 08
M.
TECH (ECE)-2014
ADVANCED
COMMUNICATION SYSTEMS
Paper
Code (EC-504)
Paper
Id. [EC-504]
Time: 3 Hrs. Max.
Marks: 100
Note: Attempt any five
questions.
Q1.
(a)
Compare
advantages and disadvantages of PCM, DPCM, delta modulation and adaptive delta
modulation techniques.
(b)
Explain
in detail QPSK transmitter and Receiver, Also calculate its BW efficiency.
Q2.
(a)
Explain
in detail Optical CDMA system. Discuss with the help of one example the working
of OCDMA.
(b)
Explain
the future prospects of Link management protocols.
Q3.
(a)
What
is fading what are the different techniques to combat with fading.
(b)
Explain
the architecture of GSM networks.
Q4.
Explain in detail different multiple
access techniques compare TDMA and CDMA.
Q5.
Calculate C/N for the uplink and down
link of satellite communication system.
Q6.
(a) Explain the working of Mobile IP
protocols.
(b)What are the
different types of transmission impairments in mobile communication system.
Q7.
Explain the different performance
parameters of satellite communication systems.
Also explain random access techniques.
Q8.
Write a short note on:
·
QoS
·
3G
System.
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