Matlab Simulation of Multiple-Antenna Communication Systems

Aim: In this assignment, you will use Matlab to simulate multiple-antenna communication systems that satisfy the requirements given in the tasks below.

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 will be allocated to the presentation and organisation of your report including the documentation of your Matlab code.  

Part 1

• Assume a single-input single-output (SISO) system operates at 24 GHz with a line-of-sight channel between the transmitter (Tx) and the receiver (Rx).

Write a Matlab script that simulates transmission of a randomly generated data over an AWGN channel using the three modulation techniques of LTE (4G), i.e. QPSK, 16-QAM and 64-QAM. Plot and compare the 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.

• 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 a 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

Part 2

For the International Mobile Telecommunications (IMT)-Advanced system, the International Telecommunication Union defines the propagation model for a line-of-sight urban macro-cell scenario with a base station antenna height of 25 m and a mobile antenna height of 1.5 m as:

Where L is the magnitude of the link attenuation in dB, r is the range in m, and f_c is the centre frequency in MHz.

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

• Write a Matlab functionthat 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

• LTE (4G) systems use the three modulation techniques. QPSK, 16QAM and 64QAM. 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 . Demonstrate that impact using the Matlab code in Part 2 1).

Part 3

Research the literature to review different beamforming techniques for massive MIMO systems in 5G communication systems. Your answer needs to provide

• A brief description of beamforming, highlighting its different techniques and their requirements
• A discussion of the importance of massive MIMO beamforming in 5G systems
• A brief analysis of the current advances in beamforming