Part 1. Mobile Fading Channels: The objective of this task is to investigate the main types of mobile
fading channels with the use of MATLAB Simulink environment and channel visualization tools. You
are required to model and simulate the following types of fading: Flat Fading, Frequency Selective
Fading, Slow Fading, and Fast Fading.
Modelling using Simulink: Construct a simple model in Simulink environment to consist of a data
source, binary PSK (BPSK) modulator and fading channel blocks. You may use a random data source
from the “Communications Blockset/Sources”, BPSK modulator from “Communications
Blockset/Modulation” and the “Multipath Rayleigh Fading Channel” from the “Communications
Blockset/Channels” libraries. You need to enable the “Open Channel Visualization” option available
within the multipath Rayleigh fading channel block to obtain plots in different domains (e.g. impulse
response, frequency response, multipath components and gains, Doppler spectrum etc.).
Simulation Results and Analysis: Set all the various parameters and run your simulations. Obtain
results and perform analysis supported by calculations and comparisons with theoretical to verify the
characteristics of each channel under investigation. You can change the settings to investigate channel
characteristics for different scenarios. Remember to include the Simulink block diagram, settings,
results, and analysis in your report.
Part 2. Fading Mitigation Methods: The aim of this task is to conduct performance investigation of
space diversity and spread spectrum as two techniques to mitigate fading. You are required to simulate
the following systems: (1) BPSK communication system (as a base for comparison purposes). (2) BPSK
with space diversity. (3) BPSK with spread spectrum.
System Modelling with Simulink: For System 1 you can use the model in Part 1 by adding the BPSK
demodulator block (from the “Communications Blockset/Modulation” Library). For System 2 you can
use the same model as system 1 but modify to include two channels and receive combining system for a
dual antenna receive diversity system. For System 3 you may use the spread spectrum Simulink Demo
model already available within MTALAB library. For each system you need also to add the Additive
White Gaussian Noise (AWGN) Channel Block from the “Communications Blockset/Channels” Library
after the fading block. To obtain the Bit Error Rate (BER) results you need to add the “Bit Error Rate
Calculation” block from “Sinks” within your models.
Simulation Results and Analysis: Obtain the BER versus Eb / No (Energy per bit-to-noise spectral
density) results for each system. You can use the “BER tools” to plot the results and for ease of
comparisons. Perform comparisons and analysis study including theoretical. Pay attention to the type of
fading channel you are using for each system. Spectrum results are also important to be obtained using
the frequency scopes available within Simulink.