EEEE2044 Coursework 2
Digital Modulation
The aim of the coursework is to evaluate BER for a range of popular digital modulation techniques.
The coursework has a total of four tasks:
- Task 1 is familiarisation with the Matlab Simulink programme and the parameters of the simulation. For this part a manual on how to build a simple communication channel is added in this document.
- Task 2 is evaluation of the BER for QPSK, 16PSK, 16QAM 64PSK, 64QAM, and 256QAM modulation techniques in the presence of the additive white Gaussian noise.
For a given modulation scheme, the BER analysis is done by changing the signal to noise ratio (parameter Eb/No) in the communication block that has additive white noise (AWGH block). Please note that the simulation parameters will need to be adjusted for each modulation technique.
- Task 3. In this part you will attempt to validate your results from Task 2. For this task, you need to find the theoretical values of the BER for selected modulation schemes and plot them for above modulation schemes. Discuss agreement or discrepancies with results obtained in Task 2. Note that Part 3 is an element of the coursework that is aimed at distinguishing students in the 70-100% mark band.
- Task 4 will consider a practical transmission system where additive white noise, time delay and frequency offset are added as a consequence of a more realistic communication system. The effect of the low pass filter on signal spectrum is also included. In this task you will plot BER for QPSK and compare that results from the one obtained in Task 2 and comment on the results.
Guidance on how to build a communication link in Simulink is given in the Appendix.
A report of results should be in the provided document and should not be longer than 4 pages. The penalty for exceeding the length is 5% per page.
The marking scheme is given in Table 1.
Table 1. Rubric marking scheme