Joint interference alignment and beyond diagonal RIS design for maximizing SNR in MIMO device-to-device communications
Abstract As a novel and flexible branch of RIS architectures, beyond-diagonal reconfigurable intelligent surface (BD-RIS) has been proposed recently to manipulate wireless environment and expand the coverage benefits. One efficient BD-RIS has been realized in the form of a unitary and symmetric RIS...
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Nature Portfolio
2025-05-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-03026-3 |
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| author | Bei Ma |
| author_facet | Bei Ma |
| author_sort | Bei Ma |
| collection | DOAJ |
| description | Abstract As a novel and flexible branch of RIS architectures, beyond-diagonal reconfigurable intelligent surface (BD-RIS) has been proposed recently to manipulate wireless environment and expand the coverage benefits. One efficient BD-RIS has been realized in the form of a unitary and symmetric RIS matrix in the existing research. However, it is still not clear whether interference alignment can improve BD-RIS aided system performance yet. In this paper, the joint optimization of interference alignment (IA) beamforming and phase-shift matrix of BD-RIS is investigated to maximize the signal-to-noise ratio (SNR), where a K-user RIS-aided multiple-input multiple-output (MIMO) device-to-device (D2D) communications system is considered. Numerical results show that the proposed algorithm can achieve a higher sum-rate compared to that of the conventional diagonal RIS and without RIS strategies. |
| format | Article |
| id | doaj-art-dcccf9b88bbb468b9521d77cf2329d90 |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-dcccf9b88bbb468b9521d77cf2329d902025-08-20T03:08:25ZengNature PortfolioScientific Reports2045-23222025-05-011511910.1038/s41598-025-03026-3Joint interference alignment and beyond diagonal RIS design for maximizing SNR in MIMO device-to-device communicationsBei Ma0Key Laboratory of Intelligent and Financial Collaborative Trusted Computing, School of Information, Shaanxi University, Xi ’an University of Finance and EconomicsAbstract As a novel and flexible branch of RIS architectures, beyond-diagonal reconfigurable intelligent surface (BD-RIS) has been proposed recently to manipulate wireless environment and expand the coverage benefits. One efficient BD-RIS has been realized in the form of a unitary and symmetric RIS matrix in the existing research. However, it is still not clear whether interference alignment can improve BD-RIS aided system performance yet. In this paper, the joint optimization of interference alignment (IA) beamforming and phase-shift matrix of BD-RIS is investigated to maximize the signal-to-noise ratio (SNR), where a K-user RIS-aided multiple-input multiple-output (MIMO) device-to-device (D2D) communications system is considered. Numerical results show that the proposed algorithm can achieve a higher sum-rate compared to that of the conventional diagonal RIS and without RIS strategies.https://doi.org/10.1038/s41598-025-03026-3Beyond diagonal reconfigurable intelligent surfaceInterference alignmentMultiple-input multiple-output device-to-devicePhase-shift matrix |
| spellingShingle | Bei Ma Joint interference alignment and beyond diagonal RIS design for maximizing SNR in MIMO device-to-device communications Scientific Reports Beyond diagonal reconfigurable intelligent surface Interference alignment Multiple-input multiple-output device-to-device Phase-shift matrix |
| title | Joint interference alignment and beyond diagonal RIS design for maximizing SNR in MIMO device-to-device communications |
| title_full | Joint interference alignment and beyond diagonal RIS design for maximizing SNR in MIMO device-to-device communications |
| title_fullStr | Joint interference alignment and beyond diagonal RIS design for maximizing SNR in MIMO device-to-device communications |
| title_full_unstemmed | Joint interference alignment and beyond diagonal RIS design for maximizing SNR in MIMO device-to-device communications |
| title_short | Joint interference alignment and beyond diagonal RIS design for maximizing SNR in MIMO device-to-device communications |
| title_sort | joint interference alignment and beyond diagonal ris design for maximizing snr in mimo device to device communications |
| topic | Beyond diagonal reconfigurable intelligent surface Interference alignment Multiple-input multiple-output device-to-device Phase-shift matrix |
| url | https://doi.org/10.1038/s41598-025-03026-3 |
| work_keys_str_mv | AT beima jointinterferencealignmentandbeyonddiagonalrisdesignformaximizingsnrinmimodevicetodevicecommunications |