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arXiv 2601.08922eess.SP
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多天线和可移动元件RIS辅助全双工6G MISO系统的联合波束成形与位置优化

Joint Beamforming and Position Optimization for Movable-Antenna and Movable-Element RIS-Aided Full-Duplex 6G MISO Systems

Ayda Nodel Hokmabadi, Chadi Assi

AI总结:

本文提出一种利用可移动天线和可移动RIS元件的全双工6G MISO系统,通过联合优化波束成形和位置以提高系统总速率。

摘要:

全双工通信通过同时利用同一时间频资源进行传输和接收显著提高了频谱效率。然而,其实际部署仍受到强残余自干扰和用户间干扰的阻碍,这严重降低了系统性能。本文研究了一种全双工MISO网络,利用可移动天线基站(MA-BS)和可移动元件可重构智能表面(ME-RIS)来克服下一代6G系统中的这些限制。与传统固定几何结构不同,所提出的框架联合优化天线和RIS元件的位置,以及RIS相移,以增强所需链路并抑制干扰。我们的设计目标是通过联合优化发射和接收波束成形向量、上行发射功率、RIS相移以及基站天线和RIS元件的空间位置来最大化系统总速率。为了解决这个具有挑战性的非凸问题,开发了一种交替优化算法,采用半正定松弛进行波束成形设计,采用递推凸逼近进行位置优化。仿真结果表明,所提出的具有可移动基站天线的ME-RIS辅助架构在传统固定位置全双工网络上具有显著优势。这些发现突显了将可移动天线与可移动RIS元件相结合作为未来6G无线系统高性能全双工操作的关键使能器的潜力。

英文摘要:

Full-duplex communication substantially enhances spectral efficiency by enabling simultaneous transmission and reception on the same time-frequency resources. However, its practical deployment remains hindered by strong residual self-interference and inter-user interference, which severely degrade system performance. This work investigates a full-duplex MISO network that leverages movable-antenna base stations (MA-BS) and movable-element reconfigurable intelligent surfaces (ME-RIS) to overcome these limitations in next-generation 6G systems. Unlike conventional fixed-geometry architectures, the proposed framework jointly optimizes antenna and RIS element positions, together with RIS phase shifts, to strengthen desired links while suppressing interference. Our design objective is to maximize the system sum rate through the joint optimization of transmit and receive beamforming vectors, uplink transmit powers, RIS phase shifts, and the spatial locations of both the BS antennas and RIS elements. To solve this challenging nonconvex problem, an alternating optimization algorithm is developed, employing semidefinite relaxation for beamforming design and successive convex approximation for position optimization. Simulation results demonstrate that the proposed ME-RIS-assisted architecture with movable BS antennas offers substantial gains over conventional fixed-position full-duplex networks. These findings highlight the potential of integrating movable antennas with movable RIS elements as a key enabler for high-performance full-duplex operation in future 6G wireless systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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