Rate Analysis and Optimization of LoS Beyond Diagonal RIS-assisted MIMO Systems
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Acceso en línea: | |
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| _version_ | 1866912319588532224 |
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| author | Santamaria, Ignacio Gutierrez, Jesus Soleymani, Mohammad Jorswieck, Eduard |
| author_facet | Santamaria, Ignacio Gutierrez, Jesus Soleymani, Mohammad Jorswieck, Eduard |
| contents | In this letter, we derive an expression for the achievable rate in a multiple-input multiple-output (MIMO) system assisted by a beyond-diagonal reconfigurable intelligent surface (BD-RIS) when the channels to and from the BD-RIS are line-of-sight (LoS) while the direct link is non-line-of-sight (NLoS). The rate expression allows to derive the optimal unitary and symmetric scattering BD-RIS matrix in closed form. Our simulation results show that the proposed solution is competitive even under the more usual Ricean channel fading model when the direct link is weak. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_07647 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Rate Analysis and Optimization of LoS Beyond Diagonal RIS-assisted MIMO Systems Santamaria, Ignacio Gutierrez, Jesus Soleymani, Mohammad Jorswieck, Eduard Information Theory In this letter, we derive an expression for the achievable rate in a multiple-input multiple-output (MIMO) system assisted by a beyond-diagonal reconfigurable intelligent surface (BD-RIS) when the channels to and from the BD-RIS are line-of-sight (LoS) while the direct link is non-line-of-sight (NLoS). The rate expression allows to derive the optimal unitary and symmetric scattering BD-RIS matrix in closed form. Our simulation results show that the proposed solution is competitive even under the more usual Ricean channel fading model when the direct link is weak. |
| title | Rate Analysis and Optimization of LoS Beyond Diagonal RIS-assisted MIMO Systems |
| topic | Information Theory |
| url | https://arxiv.org/abs/2504.07647 |