Reconfigurable intelligent surface relying on low-complexity joint sector non-diagonal structure
Reconfigurable intelligent surface relying on low-complexity joint sector non-diagonal structure
In recent years, research on reconfigurable intelligent surface (RIS) has received extensive attention due to its capability to manipulate the propagation of incident electromagnetic waves in a programmable manner to smartly configure the channel environment, thereby optimizing the overall performance of the system. Several RIS architectures have been proposed, including simultaneous transmitting and reflecting RIS (STAR-RIS) and beyond diagonal RIS (BD RIS) architectures. Compared to the conventional RIS architecture, these structures offer broader service ranges and enhanced performance, albeit accompanied by more complex circuit design and higher computational overhead. In this paper, we design a multi-sector RIS joint service model based on the BD RIS architecture and we compare the corresponding system rates, circuit complexity, and gains provided by different architectures. Additionally, we derive the theoretical receive power for the proposed model based on non-diagonal and diagonal phase shift optimization methods, demonstrating that the total rate of the non-diagonal group connected architecture approaches the theoretical values of a fully connected architecture. Theoretical analysis based on the gains between different models under various user-RIS positions confirm that the multi-sector RIS joint service model can achieve 30%-100% gains as the users' positions change, while also saving on the overall hardware costs of the RIS system design. Furthermore, we explore the optimal trade-off between the performance and circuit complexity among different architectures. Simulation results show that performance versus complexity trade-off of the different considered architectures.
1106-1123
Dong, Yinuo
b769741e-45bc-4884-8d3b-4e64848029cd
Li, Qingchao
504bc1ac-445e-4750-93ab-6ebe01591c9a
Ng, Soon Xin
e19a63b0-0f12-4591-ab5f-554820d5f78c
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Dong, Yinuo
b769741e-45bc-4884-8d3b-4e64848029cd
Li, Qingchao
504bc1ac-445e-4750-93ab-6ebe01591c9a
Ng, Soon Xin
e19a63b0-0f12-4591-ab5f-554820d5f78c
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Dong, Yinuo, Li, Qingchao, Ng, Soon Xin and El-Hajjar, Mohammed
(2024)
Reconfigurable intelligent surface relying on low-complexity joint sector non-diagonal structure.
IEEE Open Journal of Vehicular Technology, 5, .
(doi:10.1109/OJVT.2024.3447109).
Abstract
In recent years, research on reconfigurable intelligent surface (RIS) has received extensive attention due to its capability to manipulate the propagation of incident electromagnetic waves in a programmable manner to smartly configure the channel environment, thereby optimizing the overall performance of the system. Several RIS architectures have been proposed, including simultaneous transmitting and reflecting RIS (STAR-RIS) and beyond diagonal RIS (BD RIS) architectures. Compared to the conventional RIS architecture, these structures offer broader service ranges and enhanced performance, albeit accompanied by more complex circuit design and higher computational overhead. In this paper, we design a multi-sector RIS joint service model based on the BD RIS architecture and we compare the corresponding system rates, circuit complexity, and gains provided by different architectures. Additionally, we derive the theoretical receive power for the proposed model based on non-diagonal and diagonal phase shift optimization methods, demonstrating that the total rate of the non-diagonal group connected architecture approaches the theoretical values of a fully connected architecture. Theoretical analysis based on the gains between different models under various user-RIS positions confirm that the multi-sector RIS joint service model can achieve 30%-100% gains as the users' positions change, while also saving on the overall hardware costs of the RIS system design. Furthermore, we explore the optimal trade-off between the performance and circuit complexity among different architectures. Simulation results show that performance versus complexity trade-off of the different considered architectures.
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Reconfigurable_Intelligent_Surface_Relying_on_Low-Complexity_Joint_Sector_Non-Diagonal_Structure
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Accepted/In Press date: 14 August 2024
e-pub ahead of print date: 21 August 2024
Identifiers
Local EPrints ID: 493629
URI: http://eprints.soton.ac.uk/id/eprint/493629
ISSN: 2644-1330
PURE UUID: f287b425-7aba-425e-8e1f-7718b4579571
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Date deposited: 09 Sep 2024 16:57
Last modified: 10 Sep 2024 02:09
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