RIS-Aided Dual-Polarized MIMO: How Large a Surface is Needed to Beat Single Polarization?
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916461042204672 |
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| author | Zheng, Zizhou Huang, Huan Zhang, Hongliang Swindlehurst, A. Lee |
| author_facet | Zheng, Zizhou Huang, Huan Zhang, Hongliang Swindlehurst, A. Lee |
| contents | Dual-polarized (DP) multiple-input-multiple-output (MIMO) systems have been widely adopted in commercial mobile wireless communications. Such systems achieve multiplexing and diversity gain by exploiting the polarization dimension. However, existing studies have shown that the capacity of DP MIMO may not surpass that of single-polarized (SP) MIMO systems due to the cross-polarization coupling induced by the propagation environment. In this letter, we employ reconfigurable intelligent surfaces (RISs) to address this issue and investigate how large the surface should be to ensure a better performance for DP MIMO. Specifically, we first derive the capacities of DP and SP MIMO systems with an RIS, and then study the influence of the RIS size on the system capacity. Our analyses reveal how to deploy the RIS in a DP MIMO scenario. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_22799 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | RIS-Aided Dual-Polarized MIMO: How Large a Surface is Needed to Beat Single Polarization? Zheng, Zizhou Huang, Huan Zhang, Hongliang Swindlehurst, A. Lee Signal Processing Dual-polarized (DP) multiple-input-multiple-output (MIMO) systems have been widely adopted in commercial mobile wireless communications. Such systems achieve multiplexing and diversity gain by exploiting the polarization dimension. However, existing studies have shown that the capacity of DP MIMO may not surpass that of single-polarized (SP) MIMO systems due to the cross-polarization coupling induced by the propagation environment. In this letter, we employ reconfigurable intelligent surfaces (RISs) to address this issue and investigate how large the surface should be to ensure a better performance for DP MIMO. Specifically, we first derive the capacities of DP and SP MIMO systems with an RIS, and then study the influence of the RIS size on the system capacity. Our analyses reveal how to deploy the RIS in a DP MIMO scenario. |
| title | RIS-Aided Dual-Polarized MIMO: How Large a Surface is Needed to Beat Single Polarization? |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2410.22799 |