Static Grouping Strategy Design for Beyond Diagonal Reconfigurable Intelligent Surfaces
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866916238054129664 |
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| author | Nerini, Matteo Shen, Shanpu Clerckx, Bruno |
| author_facet | Nerini, Matteo Shen, Shanpu Clerckx, Bruno |
| contents | Beyond diagonal reconfigurable intelligent surface (BD-RIS) extends conventional RIS through novel architectures, such as group-connected RIS, with scattering matrix not restricted to being diagonal. However, it remains unexplored how to optimally group the elements in group-connected RISs to maximize the performance while maintaining a low-complexity circuit. In this study, we propose and model BD-RIS with a static grouping strategy optimized based on the channel statistics. After formulating the corresponding problems, we design the grouping in single- and multi-user systems. Numerical results reveal the benefits of grouping optimization, i.e., up to 60% sum rate improvement, especially in highly correlated channels. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2403_09275 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Static Grouping Strategy Design for Beyond Diagonal Reconfigurable Intelligent Surfaces Nerini, Matteo Shen, Shanpu Clerckx, Bruno Information Theory Signal Processing Beyond diagonal reconfigurable intelligent surface (BD-RIS) extends conventional RIS through novel architectures, such as group-connected RIS, with scattering matrix not restricted to being diagonal. However, it remains unexplored how to optimally group the elements in group-connected RISs to maximize the performance while maintaining a low-complexity circuit. In this study, we propose and model BD-RIS with a static grouping strategy optimized based on the channel statistics. After formulating the corresponding problems, we design the grouping in single- and multi-user systems. Numerical results reveal the benefits of grouping optimization, i.e., up to 60% sum rate improvement, especially in highly correlated channels. |
| title | Static Grouping Strategy Design for Beyond Diagonal Reconfigurable Intelligent Surfaces |
| topic | Information Theory Signal Processing |
| url | https://arxiv.org/abs/2403.09275 |