Secrecy Rate Maximization with Artificial Noise for Pinching-Antenna Systems
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866910911668682752 |
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| author | Papanikolaou, Pigi P. Bozanis, Dimitrios Tegos, Sotiris A. Diamantoulakis, Panagiotis D. Karagiannidis, George K. |
| author_facet | Papanikolaou, Pigi P. Bozanis, Dimitrios Tegos, Sotiris A. Diamantoulakis, Panagiotis D. Karagiannidis, George K. |
| contents | Security is emerging as a critical performance metric for next-generation wireless networks, but conventional multiple-input-multiple-output (MIMO) systems often suffer from severe path loss and are vulnerable to nearby eavesdroppers due to their fixed-antenna configurations. Pinching-antenna systems (PAS) offer a promising alternative, leveraging reconfigurable pinching antennas (PAs) positioned along low-loss dielectric waveguides to enhance channel conditions and dynamically mitigate security threats. In this paper, we propose an artificial noise (AN)-based beamforming scheme for downlink transmissions in PAS, with the goal of maximizing the secrecy rate. A closed-form solution is derived for the single-waveguide scenario, while an alternating optimization approach addresses more complex multiple waveguide setups. Numerical results show that the proposed scheme significantly outperforms conventional MIMO and existing PAS security schemes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_10656 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Secrecy Rate Maximization with Artificial Noise for Pinching-Antenna Systems Papanikolaou, Pigi P. Bozanis, Dimitrios Tegos, Sotiris A. Diamantoulakis, Panagiotis D. Karagiannidis, George K. Signal Processing Security is emerging as a critical performance metric for next-generation wireless networks, but conventional multiple-input-multiple-output (MIMO) systems often suffer from severe path loss and are vulnerable to nearby eavesdroppers due to their fixed-antenna configurations. Pinching-antenna systems (PAS) offer a promising alternative, leveraging reconfigurable pinching antennas (PAs) positioned along low-loss dielectric waveguides to enhance channel conditions and dynamically mitigate security threats. In this paper, we propose an artificial noise (AN)-based beamforming scheme for downlink transmissions in PAS, with the goal of maximizing the secrecy rate. A closed-form solution is derived for the single-waveguide scenario, while an alternating optimization approach addresses more complex multiple waveguide setups. Numerical results show that the proposed scheme significantly outperforms conventional MIMO and existing PAS security schemes. |
| title | Secrecy Rate Maximization with Artificial Noise for Pinching-Antenna Systems |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2504.10656 |