Spatially Selective Reconfigurable Intelligent Surfaces Through Element Permutation
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866917605908938752 |
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| author | Rusek, Fredrik Flordelis, Jose Zhao, Kun Bengtsson, Erik Zander, Olof |
| author_facet | Rusek, Fredrik Flordelis, Jose Zhao, Kun Bengtsson, Erik Zander, Olof |
| contents | A standard reconfigurable intelligent surface (RIS) can be configured to reflect signals from an arbitrary impinging direction to an arbitrary outgoing direction. However, if a signal impinges from any other direction, said signal is reflected, with full beamforming gain, to a specific direction, which is easily determined. The goal of this paper is to propose a RIS which \emph{only} reflects signals from the configured impinging direction. This can be accomplished by a RIS architecture that permutes the antenna elements in the sense that a signal is re-radiated from a different antenna than the one receiving the signal. We analytically prove this fact, and also discuss several variants and hardware implementations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_03629 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spatially Selective Reconfigurable Intelligent Surfaces Through Element Permutation Rusek, Fredrik Flordelis, Jose Zhao, Kun Bengtsson, Erik Zander, Olof Signal Processing A standard reconfigurable intelligent surface (RIS) can be configured to reflect signals from an arbitrary impinging direction to an arbitrary outgoing direction. However, if a signal impinges from any other direction, said signal is reflected, with full beamforming gain, to a specific direction, which is easily determined. The goal of this paper is to propose a RIS which \emph{only} reflects signals from the configured impinging direction. This can be accomplished by a RIS architecture that permutes the antenna elements in the sense that a signal is re-radiated from a different antenna than the one receiving the signal. We analytically prove this fact, and also discuss several variants and hardware implementations. |
| title | Spatially Selective Reconfigurable Intelligent Surfaces Through Element Permutation |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2403.03629 |