Digital, Microwave and Optical Communications

Need to Complete the Given Part’s Questions that are given in order:

–>  Digital communications 

–>  Microwave communications — For this, use software of CST studio 

–>  Optical communications —  And for Optical it is optiwave 

Need to Complete in 4000 Words.

My Budget = $30…..Not Negotiable

What am I required to do in this assignment?

You are required to complete the exercises that outlined below. There are exercises for each of the three components: Digital, Microwave
and Optical Communications. The exercises are also included below for completeness. Each exercise has a number of marks associated with
it, and you will need to answer all of the sub question for each component.

Digital communications

Q1 ) Using a diagram, explain the key components of a digital communications system

(10 marks)

Q2 a) A communication channel has a frequency spectrum from 0 up to 3.1 KHz. The channel capacity is 28.8 kps. What is the number of
symbol states that the channel supports? (10 marks)

Q2 b) What are the three different ways of modulating a signal when only one degree of freedom is modulated

(10 marks)

Submission Deadline Marks and Feedback

Before 10am on:

25/09/2020

20 working days after deadline (L4, 5 and 7)
15 working days after deadline (L6)
10 working days after deadline (block delivery)

Unit title & code Digital, Microwave and Optical Communications (CIS117-6)

Assignment number and title One – Digital, Microwave and Optical Communications

Assessment type Portfolio

Weighting of assessment 100%

Unit learning outcomes 1. Demonstrate a systematic understanding of the fundamental
underpinning scientific principles of digital, microwave and optical
communications and the corresponding system components.

2. Critically analyse and assess digital, microwave and optical
communication technologies, techniques, models and system design
and performance

2

Q3) A discrete memoryless source has an alphabet of eight letters {a,b,c,d,e,f,g,h} with respective with probabilities {0.25, 0.20, 0.15, 0.12,
0.10, 0.08, 0.05, 0.05}.

a) Using a Huffman encoding. Determine binary code for the source output and explain the codewords for each character in the alphabet
(10 marks)

b) Determine the average length of the codeword

(5 marks)

c) Determine the Huffman code efficiency (5 marks)

Q4) Design a Shannon-Fano code and sketch the corresponding coding tree where the alphabet is {a,b,c,d,e,f} with corresponding
probabilities {0.5, 0.1, 0.05, 0.05, 0.25, 0.25} (10 marks)

Microwave communications

Q1) Antennas play a vital role in the performance of wireless communications systems. Microstrip patch

antennas are very widely used in wireless applications due to their inherent features of simple design,

low complexity, ease of fabrication and low cost to meet the design requirements.

The objective of this assignment is the design of a microstrip patch antenna for a practical Wireless

Local Area Network (WLAN) application operating at ISM band in the range of 2.45 GHz. The antenna

is excited using a microstrip transmission line.

a) The important dimensions that need to be optimised include length and width of the ground plane,

patch and feed, and width and length of the two matching cuts on each side of the feed.

1. You need to design an antenna that needs to be matched such that the resonance frequency

is:

fr = 2.45GHz + (last 3 digits of your student ID / 2) Mhz

For example, if your student ID number is 1322300 then the antenna working frequency should

be as follows:

(300)

f r = 2.45GHz + (300/2)MHz

= 2.45GHz +150MHz = 2.6GHz

(20 marks)

3

Optical communications

You have to design a Radio-over-Fibre System for a two storey hospital building that has 10

rooms per floor. The communication link is to be used for a wide variety of functions including

locating physicians, requesting test results, checking patient records of patients and calling for

mobile test data.

a) justify your selection of all the components and show a block diagram of your designed system. All assumptions must be defined.

(10 marks)

b) The performance of the system must be analysed to show that the link budget of the designed system meets the requirements.

(10 marks)

c) Using Optiwave implement the system and show its performance.

(15 marks)

d) Compare the performance of the designed system with simulation results.

(5 marks)

e) What is the maximum number of channels that your system can accommodate? (10 marks)

Supplement your answer by demonstrating a solution in Optiwave.

Is there a size limit?

Yes, the overall report should not exceed 5000 words

What do I need to do to pass? (Threshold Expectations from UIF)

1. Select appropriate solutions from candidates when designing key system components

2. Analyse and evaluate the feasibility of your optical link prototype using suitable methods.

3. Design an optical link using appropriate software tools

4. Analyse and critically evaluate the feasibility of your prototype using suitable methods

5. Effectively and professionally present ideas and solutions

How do I produce high quality work that merits a good grade?

You need to demonstrate clear knowledge and understanding of the three communication system types, as well as providing evidence of
analysis and justification of the approaches you have chosen. You must clearly explain the choices you have made and back these up
using appropriate theory.

How does assignment relate to what we are doing in scheduled sessions?

4

The assignment builds upon the theory presented in class and helps you to put the theory into practice using appropriate
examples and measurements.

How will my assignment be marked?

Your assignment be marked according to the threshold expectations and the criteria on the following page.

You can use them to evaluate your own work and estimate your grade before you submit.

Pass – 40-59% Commendation – 60-69% Distinction – 70%+

1

Select appropriate solutions from
candidates when designing key
system

Explain and justify the solutions
you have made clearly
articulating the benefits

Critically evaluate the design
choices you have made and clearly
explain why you have chosen your
approach

2

Analyse and evaluate the
feasibility of your optical link
prototype using suitable
methods.

Critique you chosen design and
clearly identify improvements on
the basis of the analysis undertaken

Critically evaluate the
appropriateness of your chosen
system and demonstrate its
effectiveness compared to other
designs

3

Design an optical link using
appropriate software tools

Evaluate the effectiveness of your
chosen design making use of
appropriate data for the analysis

Compare and contrast your chosen
design clearly evaluating
effectiveness and making
suggestions for future
improvements,

4

Analyse and critically evaluate
the feasibility of your prototype
using suitable methods

Compare and contrast your chosen
prototype making suggestions for
improvements

Propose how your prototype
compares to commercially available
solutions.

5.

Effectively and professionally
present ideas and solutions

Provide a professional quality set of
solutions with clear justifcations
and rationale.

Outstanding quality report with
professional presentation, high
quality outputs and very well
explained conclusions