ENGD 3106 Kuwait University Mobile Communication Systems Discussion

ENGD3106 Mobile Communication 2Coursework Assignment
2021-2022
Mobile Communication
Systems
Total Mark: 50
Issue date: 31/01/2022
Submission deadline: 05/04/2022
Feedback date: 09/05/2022
Aim: In this assignment, you will use Matlab to simulate multiple-antenna
communication systems, demonstrate an understanding of modulation techniques in
4G, and review the literature on 5G scenario and use cases.
What to submit: Your coursework must be submitted as a report in Word format to
Turnitin. All Matlab scripts used must be included in an appendix at the end of the
report. This includes all additional functions you have written as part of your code (if
any). Your Matlab code must be well-commented and documented. All references must
be in IEEE format. Please note that 4 marks will be allocated to the presentation and
organisation of your report including the documentation of your Matlab code.
Part 1
1) Assume a single-input single-output (SISO) system operates at 2.6 GHz with a lineof-sight channel between the transmitter (Tx) and the receiver (Rx).
Write a Matlab script that simulates transmission of a randomly generated bitstream
of at least 106 bits over an Additive white Gaussian noise (AWGN) channel using
the three modulation techniques used in LTE-A (4G), i.e., QPSK, 16-QAM and
64-QAM. Plot and compare the bit error rate (BER) of these modulation
techniques as a function of the energy per bit to noise power spectral density
ratio (Eb/N0) for an AWGN channel. Discuss and analyse your results.
[10 marks]
2) Considering QPSK modulation only, demonstrate the array gain in multiple-antenna
systems by comparing the BER of the SISO system in (1) with that of single-input
multiple-output (SIMO), multiple-input single-output (MISO), and multiple-input
multiple-output (MIMO) systems.
− Assume the Rx array in SIMO is a 4-element uniform linear array (ULA) with
half-wavelength spacing
− Assume the Tx array in MISO is a 4-element ULA with half-wavelength spacing
− Assume a MIMO system with a 4-element ULA Tx array and a 4-element ULA
Rx array all with half-wavelength spacing.
Discuss and analyse your results
[14 marks]
Part 2
For the International Mobile Telecommunications (IMT)-Advanced system, the
International Telecommunication Union defines the propagation model for a non-lineof-sight urban macro-cell scenario with a base station antenna height of 30 m and a
mobile antenna height of 1.5 m as:
𝐿 = 32 log10(𝑟) + 32.4 + 20 log10(𝑓𝑐 )
where L is the magnitude of the link attenuation in dB, r is the range in m, and fc is the
carrier frequency in GHz.
Table 1 shows the link budget for the uplink on a mobile communication system
operating on 2100 MHz.
1) Write a Matlab function that can calculate the cell radius based on a given link
budget using the parameters in Table 1 as an input. Then, write a Matlab script that
uses your function to calculate the cell radius using the values in Table 1.
Table 1: Link budget for an uplink
Link Budget (Uplink)
Transmitter, terminal
Maximum mobile transmission power [W]
Antenna gain
Body loss
Receiver, Base Station
Required Eb/N0 at base station decoder
Fast fading margin
Log-normal fading margin
Antenna gain
Cable loss
User noise interference margin
Processing gain (W /R)
Thermal noise
Value
0.125
1 dBi
-4 dB
5 dB
-5 dB
-7.3 dB
18 dBi
-2 dB
3 dB
25 dB
-100.2 dBm
[7 marks]
2) LTE-A (4G) systems use the three modulation techniques QPSK, 16QAM and
64QAM.
a. Research the literature to discuss the impact of using different modulation
techniques on the cell coverage range when all other system setup parameters are
the same.
b. Demonstrate that impact using the Matlab code in Part 2 1).
c. Briefly compare those modulation techniques to the ones used in 5G New Radio
(NR) systems.
[7 marks]
Part 3
5G NR scenarios are classified as enhanced mobile broadband (eMBB), ultra-reliable
low-latency communication (URLLC), and massive machine-type communications
(mMTC). The rollout of 5G systems has globally started with eMBB. Research the
literature to briefly describe the features and applications of URLLC and mMTC. Your
answer needs to provide a discussion on the importance of each scenario and an analysis
of the challenges that face their implementation/deployment.
(Maximum length 1000 words)
Your answer should be supported by recognised publications, preferably from IEEE,
that are cited properly using the IEEE referencing style.
[8 marks]
End of Assignment