Overview
Task Assignment: Communications Coursework (Part A – Group F & Part B)
You are required to complete the Communications coursework in a fully accurate, professional, and academically rigorous manner. The work must include Part A (Group F) and Part B (MATLAB/Simulink Implementation). Ensure that all solutions are clearly presented, mathematically correct, and supported with proper explanations and analysis.
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# Part A: Theoretical Analysis (Group F)
You must solve all problems under Group F (Problems F1–F5). Each problem must include complete derivations, numerical results, and where required, clear plots or sketches.
## General Requirements:
- Show all mathematical steps clearly and logically.
- State formulas before substitution.
- Provide final numerical answers for all results.
- Include plots (MATLAB preferred) where required.
- Add a brief discussion after each problem.
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## Problem F1: AM Signal Analysis
- Determine the modulation index from the given AM waveform.
- Calculate the total signal power.
- Determine the bandwidth of the AM signal.
- Clearly explain each step and interpret the results.
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## Problem F2: Armstrong FM Modulator
- Determine the required frequency multiplication factors (n1 and n2).
- Use the given parameters such as carrier frequency, deviation, and oscillator frequency.
- Clearly show how frequency multiplication affects both the carrier frequency and frequency deviation.
- Explain why the condition fLO > n1 fc1 is required.
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## Problem F3: Nyquist Transmission Analysis
- Determine whether the given pulse satisfies the Nyquist criterion.
- Evaluate each case:
- 16-QAM
- 8-PSK (two cases)
- QPSK
- Calculate symbol rate and required bandwidth.
- Justify each answer clearly.
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## Problem F4: Quantization Analysis
- Determine the required preprocessing (such as companding or scaling).
- Calculate the quantizer range and number of quantization levels.
- Ensure all results satisfy the required SQNR and probability constraints.
- Show complete mathematical steps.
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## Problem F5: WLAN Communication System
- Calculate the bit rate using the given modulation parameters.
- Determine the receiver sensitivity required for the specified BER.
- Perform a full link budget analysis including transmit power, antenna gains, and path loss.
- Calculate the maximum communication range.
- Clearly justify all assumptions and results.
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# Part B: MATLAB / Simulink Communication System
You are required to design and simulate a complete digital communication system using MATLAB or Simulink.
## Objective:
Design a system capable of transmitting data over a poor-quality communication channel and evaluate its performance.
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## System Design Requirements:
### Transmitter:
- Generate binary data.
- Apply an appropriate modulation scheme such as BPSK, QPSK, QAM, or PAM.
- Implement pulse shaping using suitable filters such as Root Raised Cosine.
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### Channel:
- Model realistic impairments including:
- Additive White Gaussian Noise (AWGN)
- Signal attenuation
- Propagation delay
- Optional multipath effects
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### Receiver:
- Perform demodulation.
- Apply matched filtering.
- Implement synchronization if required.
- Recover the transmitted data accurately.
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## Simulation Tasks:
- Build the system using MATLAB or Simulink.
- Test multiple modulation techniques.
- Analyze performance under different SNR conditions.
- Measure and report Bit Error Rate (BER).
- Compare performance results.
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## Analysis and Discussion:
- Explain the impact of noise and channel impairments on system performance.
- Compare different modulation techniques in terms of efficiency and reliability.
- Suggest improvements such as error correction coding, adaptive modulation, or power optimization.
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# Report Requirements
The final report must include:
1. Introduction
2. Part A (Group F Solutions)
- Full derivations
- Numerical results
- Plots and explanations
3. Part B (Simulation)
- System design and block diagram
- Simulation results
4. Discussion
5. Conclusion
6. References
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# Individual Reflections (Mandatory)
The group consists of 5 members, and each member must submit an individual reflection.
Each reflection must include:
- Description of individual contribution
- Tasks performed in Part A and/or Part B
- Skills and knowledge gained
- Challenges faced and how they were addressed
- Personal evaluation of teamwork
Each reflection must be clearly labeled with the student’s name.
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# Additional Notes
- Ensure all work is original and properly referenced.
- Maintain clear academic writing and formatting.
- Submit MATLAB/Simulink files along with the report.
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The final submission must be complete, well-structured, and suitable for academic evaluation at a high standard.