Secure Energy-Efficient Joint SDMA Beamforming and RIS Phase Shift Optimization

This repository provides the Python implementation of the optimization framework proposed in

"Secure Rate-Splitting and RIS Beamforming with Untrusted Energy Harvesting Receivers"

The code jointly optimizes transmit beamforming for maximizing the secure energy efficiency (SEE) using:

• Successive Convex Approximation (SCA)
• Dinkelbach fractional programming
• CVXPY optimization
• MOSEK solver

Note: This implementation uses CVXPY with the MOSEK solver. A valid MOSEK installation and license are required for best performance.

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Features

• Multiuser SDMA downlink
• Physical layer security
• Secure energy efficiency maximization
• SCA-based convex approximation
• Monte Carlo simulations
• Publication-quality result plotting

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Project Structure

Secure-EE-SDMA/
│
├── src/
│   ├── main_SDMA.py
│   ├── optimization.py
│   ├── sca_opt.py
│   ├── sca_funcs.py
│   ├── calculate_sinrs.py
│   └── Channels.py
│
├── results/
│   ├── results_sdma.npz
│   └── figures/
│
├── plot_results.py
├── requirements.txt
└── README.md

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Requirements

• Python 3.10+
• NumPy
• SciPy
• Matplotlib
• CVXPY
• MOSEK

Install the required packages

pip install -r requirements.txt

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Running the simulation

Run

python src/main_SDMA.py

The simulation automatically stores the results in

results_sdma.npz

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Plotting the results

Run

python plot_results.py

Example outputs include

• Minimum secrecy rate versus transmit power
• Secure energy efficiency versus transmit power

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Simulation Parameters

Typical default parameters

Parameter	Value
BS antennas	6
Users	4
Eavesdroppers	3
Maximum power	10–30 dBm
Episodes	20

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Citation

If you use this code in your research, please cite

H. R. Hashempour, L.-N. Tran, D. H. N. Nguyen, and H. Q. Ngo, "Secure Rate-Splitting and RIS Beamforming with Untrusted Energy Harvesting Receivers," IEEE International Conference on Communications Workshops (ICC Workshops), 2026, pp. 1–6.

DOI: https://doi.org/10.1109/ICCWorkshops63917.2026.11586471

BibTeX

@INPROCEEDINGS{11586471,
  author={Hashempour, Hamid Reza and Tran, Le-Nam and Nguyen, Duy H. N. and Quoc Ngo, Hien},
  booktitle={2026 IEEE International Conference on Communications Workshops (ICC Workshops)},
  title={Secure Rate-Splitting and RIS Beamforming with Untrusted Energy Harvesting Receivers},
  year={2026},
  pages={1-6},
  doi={10.1109/ICCWorkshops63917.2026.11586471}
}

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Contact

Hamid Reza Hashempour

School of Electronics, Electrical Engineering and Computer Science

Queen's University Belfast

Email: h.hashempoor@qub.ac.uk, rezarhp@gmail.com