Wireless network (IT)

MITS5003 Wireless Networks & Communication -

2019S2

Assignment No 1

Submission Due Date: 06/09/2019 before 5 pm

Submission Guidelines:

All submissions are to be submitted through turn-it-in. Drop-boxes linked to turn-it-in will be

set up in the Unit of Study Moodle account. Assignments not submitted through these drop-

boxes will not be considered.

Submissions must be made by the due date and time.

The turn-it-in similarity score will be used in determining the level if any of plagiarism. Turn-it-in

will check conference web-sites, Journal articles, the Web and your own class member

submissions for plagiarism. You can see your turn-it-in similarity score when you submit your

assignment to the appropriate drop-box. If this is a concern you will have a chance to change

your assignment and re-submit. However, re-submission is only allowed prior to the submission

due date and time. After the due date and time have elapsed you cannot make re-submissions

and you will have to live with the similarity score as there will be no chance for changing. Thus,

plan early and submit early to take advantage of this feature. You can make multiple

submissions, but please remember we only see the last submission, and the date and time you

submitted will be taken from that submission.

Your document should be a single word or pdf document containing your report.

1. Describe the difference between IP and Network Access layer in TCP protocol and also

explain the control information embedded in these two layers.

2. The French and Chinese prime ministers need to come to an agreement by telephone,

but neither speaks the other’s language. Further, neither has on hand a translator that

can translate to the language of the other. However, both prime ministers have English

translators on their staffs. Draw a diagram similar to Figure 1 to depict the situation, and

describe the interaction and each level.

3. From the following figures, compute the maximum amplitude, frequency, time period

and phase for each of the wave. The x-axis represents the time in sec and y-axis

represents the amplitude.

4. Compute the amplitude, frequency, time period and phase for each of the following

equations and also draw their respective waveforms.

a. 3𝑆𝑖𝑛(2𝜋(200)𝑡)

b. 14𝑆𝑖𝑛(2𝜋(50)𝑡 + 90)

c. 4𝑆𝑖𝑛(650𝜋𝑡 + 180)

d. 6𝑆𝑖𝑛(700𝜋𝑡 + 270)

5. Determine the isotropic free space loss at 6 GHz for the shortest path to a synchronous

satellite from earth (35,863 km).

6. Given a signal as follows, compute the fundamental frequency, spectrum and

bandwidth. Also calculate the channel capacity using Nyquest criteria using M= 2, 4, 8,

where M is the number of levels.

𝑠(𝑡) = 5 sin(100𝜋𝑡) + sin(300𝜋𝑡) + sin(600𝜋𝑡)

7. Explain how the data rate over a channel can be increased, without increasing the

bandwidth? What is the disadvantage of this approach?

Hint: Nyquist Theorem

8. What is the main difference between Packet switching and Circuit Switching? Also

discuss the advantages of Packet switching over Circuit Switching and vice versa.

9. In a LOS communication, consider d = 60km, the requirement is to make two antennas

(transmitter and receiver) such that the height of one antenna should be four time of

the other. Considering this, find the appropriate heights of these two antennas.