Please complete the uploaded Communications assignment from the beginning to the final submission stage and ensure that all work is technically accurate, academically written, and ready for direct submission without requiring any further modifications.
General Requirements
* Review the assignment brief, lecturer comments, and the existing report carefully.
* Correct all technical, mathematical, and presentation issues.
* Use formal academic English throughout the report.
* Ensure consistency between the project objectives, simulation model, calculations, results, and conclusions.
* Verify all formulas, numerical calculations, graphs, and interpretations before submission.
* Remove grammatical errors, formatting issues, duplicated statements, and inaccurate technical claims.
Part 1 Question B3 and Question B4
Complete Question B3 and Question B4 exactly as required in the original assignment brief.
Requirements
* Present all formulas used.
* Show complete step-by-step calculations.
* Clearly define all variables and units.
* Provide correct final numerical answers.
* Include explanations of the methodology and reasoning used.
* Ensure all communication theory equations are applied correctly.
* Present the solutions in a professional report format suitable for academic submission.
Part 2 Complete Revision and Improvement of the Report
Use the existing report as a foundation and revise it completely where necessary.
1. Correct BER Calculations in Section 4.3
The current Bit Error Rate calculations for 8-PAM contain theoretical and numerical errors.
Required work:
* Remove all incorrect BER equations and calculations.
* Use the correct theoretical M-ary PAM error probability equations for an AWGN channel.
* Implement the proper Q-function or complementary error function (erfc) expressions.
* Recalculate BER values for all tested SNR levels.
* Produce accurate BER results.
* Recalculate the average BER correctly.
* Update all related explanations and discussions accordingly.
2. Correct the Channel Model Description
The report incorrectly states that an AWGN channel includes multipath propagation and fading effects.
Required work:
* Remove all inaccurate statements regarding multipath propagation, fading, and delay spread from the AWGN channel description.
* Rewrite the channel model section according to standard communication theory.
* If multipath effects are to be included, explicitly implement and document Rayleigh or Rician fading models within Simulink; otherwise keep the model strictly AWGN.
3. Ensure Consistency Between the Project Objective and the Implemented Model
The report currently describes a wireless acoustic communication system while the implemented Simulink model represents a baseband 8-PAM communication system operating over an AWGN channel.
Required work:
* Rewrite the introduction and project objectives so that they accurately reflect the implemented model.
* Ensure consistency throughout all chapters.
* Remove any unsupported claims that are not represented in the Simulink implementation.
4. Improve Simulation Model Documentation
Review the complete Simulink model and update the description accordingly.
Required work:
* Ensure every block described in the report is visible in the Simulink model.
* Provide accurate explanations of all transmitter, channel, receiver, filtering, and decision-making blocks.
* Explain signal flow clearly from source generation to data recovery.
* Improve Figure 1 and its explanation if necessary.
5. Strengthen Results and Analysis
The current results section contains mostly descriptive observations and lacks quantitative analysis.
Required work:
* Include actual measured BER values obtained from simulation.
* Compare theoretical BER and simulated BER.
* Include numerical SNR results.
* Quantify eye-diagram performance where possible.
* Explain observed trends using communication theory.
* Provide detailed interpretation of all generated figures.
* Discuss system behaviour at low, medium, and high SNR values.
6. Improve Figure Captions and Presentation
All figures must contain professional captions.
Required work:
* Write descriptive figure captions.
* Explain what each figure demonstrates.
* Link each figure directly to system performance.
* Ensure all figures are referenced correctly within the report text.
7. Expand Critical Discussion
Rewrite and strengthen the Discussion chapter.
Required work:
* Analyse the advantages and limitations of 8-PAM.
* Explain the relationship between SNR and BER.
* Compare the selected modulation scheme with BPSK and QPSK.
* Discuss spectral efficiency versus noise sensitivity.
* Compare simulation results with communication theory and published literature.
* Critically evaluate system performance rather than merely describing figures.
8. Review Conclusions and Future Work
Revise the conclusion and future work sections.
Required work:
* Ensure conclusions are supported by obtained results.
* Summarise the actual performance achieved.
* Present realistic limitations.
* Recommend technically valid future enhancements such as:
* Error correction coding.
* Adaptive modulation.
* Rayleigh/Rician fading channels.
* Hardware implementation using SDR or FPGA platforms.
MATLAB and Simulink Requirements
Use MATLAB and Simulink to produce all required simulation outputs.
Required outputs:
* BER versus SNR plot.
* Eye diagram.
* Constellation diagram.
* Transmitted signal waveform.
* Received signal waveform.
* Recovered signal waveform.
* Any additional plots necessary to support analysis.
Ensure all figures are generated from actual simulation results and not copied from external sources.
References
Review all references.
Required work:
* Verify authenticity and relevance of cited references.
* Remove weak or unreliable references if necessary.
* Use a consistent citation style throughout the report.
* Ensure references support the technical content presented.
Final Deliverables
Provide the following files:
1. Fully revised Microsoft Word report (.docx).
2. Final PDF version of the report (.pdf).
3. MATLAB source files (.m).
4. Simulink project files (.slx).
5. All generated figures in editable and image formats.
6. Any calculation sheets or supporting files used during development.
Final Quality Requirement
The final work must be technically correct, academically professional, free from calculation errors, logically structured, fully consistent with communication engineering principles, and suitable for direct submission to the lecturer without requiring any additional corrections or revisions.
