Questions
Syllabus
Qns. By Syllabus

Semester

Subject

Year

Tribhuwan University

Institute of Science and Technology

Model

Bachelor Level / Third Year / Sixth Semester / Science

Bachelors in Information Technology (BIT357)

(Wireless Networking)

Full Marks: 60

Pass Marks: 24

Time: 3 Hours

Candidates are required to give their answers in their own words as for as practicable.

The figures in the margin indicate full marks.

Section A

Long Answers Questions

Attempt any TWO questions.
[2*10=20]
1.
Explain free space propagation model. If transmitter power 1W carrier frequency is 2.4GHz and receiver is at distance 2 km. Assume that transmitter and receiver antennas gains are 1.6. Express the transmit power in dBm and dBW and find path loss in dB.[10]
2.
When digital data need to be converted into analog signal? How MSK and GMSK converts digital data into analog signals? Demonstrate with example.[10]
3.
Explain the concept of time and frequency division multiplexing briefly. Discuss working of TDMA in detail.[10]
Section B

Short Answers Questions

Attempt any Eight questions.
[8*5=40]
4.
Discuss the concept of large scale fading and explain fading due to multipath time delay spread. [5]
5.
Discuss the problems of 3G technologies and how these problems are addressed in 4G? [5]
6.
Explain inter symbol reference and Raised Cosine Pulse in detail. [5]
7.
How dynamic locations are managed in cellular networks? Explain. [5]
8.
Why tunneling is necessary? How tunneling is done in mobile IP? Explain. [5]
9.
What is meant by equalization? How equalization is done in wireless communication? Discuss any one algorithm. [5]
10.
List out routing protocols used in wireless communication? Discuss the working of Adhoc routing protocol [5]
11.
Why pulse shaping technique is used? Explain any one pulse shaping technique. [5]
12.
Write short notes on a. Challenges of Wireless communication b. CDMA [5]