Leakage Subspace Precoding and Scheduling for Physical Layer Security in Multi-User XL-MIMO Systems
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2022
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| _version_ | 1866917816884527104 |
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| author | Anaya-Lopez, Gonzalo J. Gonzalez-Coma, Jose P. Lopez-Martinez, F. Javier |
| author_facet | Anaya-Lopez, Gonzalo J. Gonzalez-Coma, Jose P. Lopez-Martinez, F. Javier |
| contents | We investigate the achievable secrecy sum-rate in a multi-user XL-MIMO system, on which user distances to the base station become comparable to the antenna array dimensions. We show that the consideration of spherical-wavefront propagation inherent to these set-ups is beneficial for physical-layer security, as it provides immunity against eavesdroppers located in similar angular directions that would otherwise prevent secure communication under classical planar-wavefront propagation. A leakage subspace precoding strategy is also proposed for joint secure precoding and user scheduling, which allows to improve the secrecy sum-rate compared to conventional zero-forcing based strategies, under different eavesdropper collusion strategies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2205_11335 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Leakage Subspace Precoding and Scheduling for Physical Layer Security in Multi-User XL-MIMO Systems Anaya-Lopez, Gonzalo J. Gonzalez-Coma, Jose P. Lopez-Martinez, F. Javier Information Theory Signal Processing We investigate the achievable secrecy sum-rate in a multi-user XL-MIMO system, on which user distances to the base station become comparable to the antenna array dimensions. We show that the consideration of spherical-wavefront propagation inherent to these set-ups is beneficial for physical-layer security, as it provides immunity against eavesdroppers located in similar angular directions that would otherwise prevent secure communication under classical planar-wavefront propagation. A leakage subspace precoding strategy is also proposed for joint secure precoding and user scheduling, which allows to improve the secrecy sum-rate compared to conventional zero-forcing based strategies, under different eavesdropper collusion strategies. |
| title | Leakage Subspace Precoding and Scheduling for Physical Layer Security in Multi-User XL-MIMO Systems |
| topic | Information Theory Signal Processing |
| url | https://arxiv.org/abs/2205.11335 |