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Modern Communication Systems Question Paper

Modern Communication Systems

Course:Bachelor Of Science In Computer Engineering

Institution: Kenyatta University question papers

Exam Year:2008

KENY ATT A UNIVERSITY
UNIVERSITY
EXAMINATIONS
2007/2008
SECOND SEMESTER
EXAMINATION
FOR THE DEGREE OF MASTER OF SCIENCE IN
COMPUTER
ENGINEERING
SCE 508: MODERN COMMUNICATION
SYSTEMS
DATE: Wednesday 30th April 2008
TIME: 11.00 a.m. - 1.00 p.m.
INSTRUCTIONS
Answer question 1 and any other two.
Question 1 (compulsory)
a) Discuss the following satellite system parameters
(i)
Back-offloss
(ii)
Transmit power and bit energy
(iii)
Noise density
[6 marks]
b) List any five drawbacks of optical fiber cable
[5 marks]
c) Describe the general procedure involved in completing the following type of calls
(i)
Mobile (cellular) to wire line (PSTN) calls.
(ii)
Mobile to mobile calls
[8 marks]
d) Define the term radar
[1 mark]
e) Explain the working of Bluetooth wireless communication
[6 marks]
f) What are the advantages ofCDMA over FDMA and TDMA
~~~
[4 marks]
I:V
Question 2
,
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a) Discuss power losses in optical fiber cables
'\\"f';'
[10 marks]
b) Obiero lost his Nokia 3310 GSM phone as he wa if~ ling to Mombasa, he called his
service provider ceItel and gave the IMEI nUl]lJt~J;. nd one month later he got a note from
admin the he should go and collect his han };~t'Mkasarani police station. Explain how this
recovery is incorporated in the GSM arc
~. ture.
[8 marks]
c) State any four applications of a rad
em
[2 marks]
Question 3
a) Discuss the parameters of GSM radio subsystem
[7 marks]
b) Explain the working of an automatic tracking radar system.
[4 marks]
c) For any ray coupled to an optical fiber core at an angle 2in, state the necessary and the
sufficient condition for it to travel through the fiber.
[4 marks]
d) With the aid of a block diagram, explain the work a UMTS network
[5 marks]
Question 4
a) Discuss the major components of pulsed radar system.
[7 marks]
b) State the three main services offered by GSM telephone
[3 marks]
c) List any three satellite subsystems and explain their role
[6 marks]
d) Compare LED and ILD when used in optical fiber communication source.
[4 marks]
Question 5
a) Differentiate between graded index and step index fiber
[4 marks]
b) Explain the construction of the following light detectors
[6 marks]
(i)
PIN
(ii)
APD
c) Explain how interactive teletext work.
[5 marks]
d) Discuss the future trends of telecommunication in Kenya, give remedies to any foreseen
problems
[5 marks]

Modern Communication Systems Question Paper

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