### Solution

*Assignment *– Wireless Networking Concepts (ITC513_201960)

*Subject Code*: ITC513

*Resources*: Lecture Notes, Internet

*Tools*: GNU Octave, MS Office

*Overview*: The assessment includes two tasks, specifically deals in wireless communication system. The course focuses on the wireless networking concepts and plays a vital role to achieve the fluency in terms of important wireless parameters. The assessment will cover some of the vital parameters that are used to measure the performance of an *antenna* like *Gain*, *Efficiency*, *Radiation Patterns* and *Antenna Directivity. *Apart from this, the assessment deals in calculating received power and Gain for the transmitting antenna. Along with the this, a complete code is designed that will run in GNU Octave tool displaying all the calculations. The description of the task in terms of tasks are provided as underneath;

*Task 1*: In the initial task, all the parameters like gain, efficiency, radiation patterns are detected that are very crucial in terms of both transmitter and receiver side. To do this, the mathematical expressions are used that are studied in the form of lectures in the class. In addition, to monitor the impact, performance for each attribute is noticed in the wireless communication systems.

*Task 2*: This task will be designed in the form of code that will execute in GNU Octave tool to measure the power in watts and also the gain on the receiving antenna. After executing the code, the complete plots are extracted from the given attributes. The plotting and calculations are equally important for the task as they both are equally marked.

AA Assessment ITC513 201960
Value: 20%
Due Date: 04-Dec -2019
Task 1 (10 Marks)
In a wireless communication system, antennas play crucial role at both transmitter and
receiver sides. Some of the important design parameters used to measure the performance
of an antenna are Directivity, Gain , Efficiency and Radiation Patterns. Explain w ith
reasonable examples, what is Antenna Directivity, Gain, Efficiency and Radiation Patterns .
You may consider providing mathematical expressions as well as figures for the explanation
of these parameters. You are also required to provide the impact of pe rformance of each
parameter in a wireless communication system. (2.5 x 4 = 10 marks for properly explaining
all four parameters)
Task 2 (10 Marks)
A wireless communication system is working at 10 GHz frequency where the transmit
antenna is transmitting with 20mW of transmit power. A wireless receiver with an effective
diameter of 250 cm is measuring the received power at distances from 1 to 20 km with an
increment of 1km. The gain of the transmit antenna is 30 dB.
What is gain of the receive antenna at 10GHz frequency? (2 marks)
You are also required to calculate and plot the received power, P r, in Watts using GNU
Octave. You are to show the GNU Octave code showing your calculations of P r and a plot
showing P r versus distance from 1km up to 20km. (4 mark s for showing correct P r
calculations with GNU Octave code) + (4 marks for plotting correctly P r as a function of
distance)
Marking criteria and standards
Task
HD
(100% -85%)
DI
(84% -75%)
CR
(74% -65%)
PS
(64% -50%)
FL
(49% -0)
Task 1: (10 marks )
An excellent and well written
description of all four
parameters, with appropriate
example s, impact of each
parameter in wireless system,
mathematical expression and
figures. Proper references (if
used) are provided.
An excellent and well written
description of all four
parameters, with example s,
im pact of each parameter in
wireless system,
mathematical expression and
figures. Some references
prov ided (if used).
Overall good description of
most of the parameters,
with some example s, some
description on impact of
each parameter in wireless
system, some mathematical
expression and figures.
An acceptable
description of at least
two parameters, with
example, impact of each
parameter in wireless
system, mathematical
expression and figures.
No description or
incorrect
description of the
task provided.
Task 2: (10 marks )
All calculations are correctly
done. GNU Octave working
code for the c alculations as
well as for plot is provided .
Plot is properly labelled.
All calculations are correctly
provided. Some pa rts of the
code may not be correctly
working. Some labels in the
plot may not be correctly
provided.
Either receive antenna gain
or receive pow er
calculations are no t correct
or not provided. Plot is
correct and labels are
correct.
Receive antenna gain or
receive power or receive
power plot is either
missing or incorrect. At
least two out of three
asked tasks are
attempted and
evidenced in t he report.
The calculations
are not correct
and the plot is
not correct.