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On-line Access: 2024-12-20

Received: 2024-05-10

Revision Accepted: 2024-10-27

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Citations:  Bibtex RefMan EndNote GB/T7714

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Frontiers of Information Technology & Electronic Engineering 

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Transmission design for the XL-RIS-aided massiveMIMO system with visibility regions


Author(s):  Luchu LI, Cunhua PAN, Kangda ZH, Hong REN

Affiliation(s):  School of Information Science and Engineering, Southeast University, Nanjing 210096, China; more

Corresponding email(s):  213203234@seu.edu.cn, cpan@seu.edu.cn, k.zhi@tu-berlin.de, hren@seu.edu.cn

Key Words:  Reconfigurable intelligent surface; Massive MIMO; Two-timescale transmission scheme; Visibility regions


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Luchu LI, Cunhua PAN, Kangda ZH, Hong REN. Transmission design for the XL-RIS-aided massiveMIMO system with visibility regions[J]. Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/FITEE.2400375

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author="Luchu LI, Cunhua PAN, Kangda ZH, Hong REN",
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Abstract: 
This study proposed a two-timescale transmission scheme for extremely extra-large (XL)-reconfigurable intelligent surfaces (RIS)-aided massive multi-input multi-output (MIMO) systems in the presence of visibility regions (VRs). The beamforming of base stations (BS) is designed based on rapidly changing instantaneous channel state information (CSI), while the phase shifts of RIS are configured based on slowly varying statistical CSI. Specifically, we first formulated a system model with spatially correlated Rician fading channels and introduced the concept of VRs. Then, we derived a closed-form approximate expression for the achievable rate and analyzed the impact of VRs on system performance and computational complexity. Then, we solved the problem of maximizing the minimum user rate by optimizing the phase shifts of RIS through an algorithm based on accelerated gradient ascent. Finally, we presented numerical results to validate the performance of the considered system from different aspects and revealed the low system complexity of deploying XL-RIS in massive MIMO systems with the help of VRs.

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