ENGD3106 Mobile Communication 2|通信工程|MATLAB|移动通信

ENGD3106 Mobile Communication 2

Coursework Assignment II


Mobile Communication Systems

Issue date: 30/03/2020

Submission deadline: 14/05/2020

Feedback date: 04/06/2020

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 5 marks will be allocated to the presentation and organisation of your report. 

where L is the magnitude of the link attenuation in dB, r is the range in m, and fc is the centre frequency in GHz.

Table 1 shows the link budget for the uplink on a mobile communication system operating on 2.1 GHz.

  1. Calculate the range of the radio cell based on the link budget given in Table 1.
Link Budget (Uplink) Value
Transmitter, terminal  
Maximum mobile transmission power [W] 0.3
Antenna gain 1.0 dBi
Body loss -2 dB
Receiver, Base Station  
Required Eb/N0 at base station decoder 5 dB
Fast fading margin -4 dB
Log-normal fading margin -7.3 dB
Antenna gain 11 dBi
Cable loss -3 dB
User noise interference margin 3 dB
Processing gain (W /R) 24 dB
Thermal noise -118.4 dBm

Table 1

[5 marks]

[8 marks]

Use the Matlab code in b) to demonstrate the impact of different bit rates on the cell radius. 

[8 marks]

  • GSM systems use Aloha techniques to control the access to radio channels. With Rayleigh fading, the throughput of slotted Aloha S is given by

where G is the average number of all access attempts made in a fixed interval and  ≥ 1 is a threshold called capture ratio.

  1. Find the maximum throughput of slotted Aloha, i.e. the maximum possible value of S.  

[5 marks]

  • Suppose  dB, calculate the maximum value of S.

[2 marks]

  • Verify your answer of b) by using Matlab to plot S as a function of G and mark its maximum point.

[7 marks]

  • The International Telecommunication Union has defined three scenarios for 5G communication systems:
  • Enhanced Mobile Broadband (eMBB)
  • Ultra-Reliable Low Latency Communications (URLLC)
  • Massive Machine Type Communications (mMTC)

Research the literature to review these scenarios highlighting the main applications of each one. Your answer should be supported by recognised publications, preferably from IEEE, that are cited properly using the IEEE referencing style (500 words maximum).

[10 marks]

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