Wideband Modeling and Beamforming for Beyond Diagonal Reconfigurable Intelligent Surfaces
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866916166682804224 |
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| author | Li, Hongyu Nerini, Matteo Shen, Shanpu Clerckx, Bruno |
| author_facet | Li, Hongyu Nerini, Matteo Shen, Shanpu Clerckx, Bruno |
| contents | This work studies the wideband modeling and beamforming design of beyond diagonal reconfigurable intelligent surface (BD-RIS), which generalizes and goes beyond conventional RIS with diagonal phase shift matrices to achieve enhanced channel gain. Specifically, we investigate the response of BD-RIS in wideband systems by going back to its hardware circuit realizations. We propose a novel wideband model which has simple expressions while capturing the response variations of BD-RIS for signals with different frequencies. With this wideband model, we propose a BD-RIS design algorithm for an orthogonal frequency division multiplexing system to maximize the average rate over all subcarriers. Finally, we provide simulation results to evaluate the performance of the proposed design and show the importance of wideband modeling for BD-RIS. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_12893 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Wideband Modeling and Beamforming for Beyond Diagonal Reconfigurable Intelligent Surfaces Li, Hongyu Nerini, Matteo Shen, Shanpu Clerckx, Bruno Information Theory Signal Processing This work studies the wideband modeling and beamforming design of beyond diagonal reconfigurable intelligent surface (BD-RIS), which generalizes and goes beyond conventional RIS with diagonal phase shift matrices to achieve enhanced channel gain. Specifically, we investigate the response of BD-RIS in wideband systems by going back to its hardware circuit realizations. We propose a novel wideband model which has simple expressions while capturing the response variations of BD-RIS for signals with different frequencies. With this wideband model, we propose a BD-RIS design algorithm for an orthogonal frequency division multiplexing system to maximize the average rate over all subcarriers. Finally, we provide simulation results to evaluate the performance of the proposed design and show the importance of wideband modeling for BD-RIS. |
| title | Wideband Modeling and Beamforming for Beyond Diagonal Reconfigurable Intelligent Surfaces |
| topic | Information Theory Signal Processing |
| url | https://arxiv.org/abs/2403.12893 |