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Ece 521: Mobile And Wireless Systems Question Paper

Ece 521: Mobile And Wireless Systems

Course:Bachelor Of Engineering In Electrical And Electronics Engineering

Institution: Moi University question papers

Exam Year:2010

MOI UNIVERSITY
DEPARTMENT OF ELECTRICAL AND COMMUNICATIONS ENGINEERING

ECE 521: Mobile and Wireless Systems

QUESTION ONE
a. Write the following acronyms in full:
i. UTRAN
ii. GGSN (1mks)

b. Discuss the following wireless channel concepts:
i. Equalization.
Ii. Diversity. (3mks)

c. With the help of a well labelled diagram discuss the components of a wireless channel. (10mks)

QUESTION TWO
a. Give the principle on which cellular networks as designed. (2mks)

b. Discuss the following cellular concepts:
i. Cell splitting
ii. Frequency reuse. (4mks)

c.
i. Compare and contrast the handoff schemes. (6mks)
ii. Enumerate four features which enable the life of a GSM mobile station to be extended. (2mks)

QUESTION THREE
Discuss the basic steps involved in the designn of cellular networks. (14mks)

QUESTION FOUR
a. List any four basic ways of distributing the communication resources. (2mks)

b. Discuss the division duplex schemes. (4mks)

c.
i. List the basic ways to increase throughput of a communication resource. What is the key to all multiplexing and multiple access schemes? (4mks)

ii. Explain the advantages of CDMA over FDMA and TDMA. (4mks)

QUESTION FIVE
a. Explain why in GSM the lower part of the frequency band is used in the uplink and the upper part in the downlink. (2mks)

b.
i. What is the GERAN group charged with in 3GPP (1mks)
ii. Give the guiding principles on which GPRS is designed. (3mks)

c. Discuss the new elements in all-IP UMTS core network architecture. (8mks)

QUESTION SIX
a. Draw IEEE 802.11 standards mapped on the OSI reference model. (2mks)

b. With a well labelled diagram draw the Bluetooth protocol stack. (2mks)

c. Discuss any five techniques used in system expansion. (10mks)

Ece 521: Mobile And Wireless Systems Question Paper

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