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arXiv 2302.03342eess.SP
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基于STAR-RIS的室内外同时三维定位:理论分析与算法设计

STAR-RIS-Enabled Simultaneous Indoor and Outdoor 3D Localization: Theoretical Analysis and Algorithmic Design

Jiguang He, Aymen Fakhreddine, George C. Alexandropoulos

摘要:

最近的研究和开发兴趣涉及用于无线系统的超表面,而不仅仅是考虑作为智能可调反射器。在最新的提议中,有一个是同时传输(也就是说,折射)和反射可重构智能表面(STAR-RIS),由于其附加的折射能力,STAR-RIS旨在实现双向室内到室外通信,反之亦然。这种双重功能在同时满足位于元表面两侧的用户的服务质量要求(例如,可实现的数据速率和定位精度)方面提供了增加的灵活性。在本文中,我们专注于STAR-RIS授权的同时室内和室外三维(3D)定位,并通过Fisher信息分析和Cramér Rao下界(CRLB)研究的基本性能限制。我们还设计了一个有效的定位算法的基础上离网压缩感知(CS)技术依赖于原子范数最小化(ANM)。训练开销的影响,在STAR-RIS的功率分配,用户之间的功率分配,STAR-RIS的大小,STAR-RIS到BS信道的缺陷,以及多径分量的作用上的定位性能进行评估,通过广泛的计算机模拟。理论上表明,高精度,高达厘米级,3D定位可以同时实现室内和室外用户,这也是通过所提出的基于ANM的估计算法来实现的。

英文摘要:

Recent research and development interests deal with metasurfaces for wireless systems beyond their consideration as intelligent tunable reflectors. Among the latest proposals is the simultaneously transmitting (a.k.a. refracting) and reflecting reconfigurable intelligent surface (STAR-RIS) which intends to enable bidirectional indoor-to-outdoor, and vice versa, communications thanks to its additional refraction capability. This double functionality provides increased flexibility in concurrently satisfying the quality-of-service requirements of users located at both sides of the metasurfaces, for example, the achievable data rate and localization accuracy. In this paper, we focus on STAR-RIS-empowered simultaneous indoor and outdoor three-dimensional (3D) localization, and study the fundamental performance limits via Fisher information analyses and Cramér Rao lower bounds (CRLBs). We also devise an efficient localization algorithm based on an off-grid compressive sensing (CS) technique relying on atomic norm minimization (ANM). The impact of the training overhead, the power splitting at the STAR-RIS, the power allocation between the users, the STAR-RIS size, the imperfections of the STAR-RIS-to-BS channel, as well as the role of the multi-path components on the positioning performance are assessed via extensive computer simulations. It is theoretically showcased that high-accuracy, up to centimeter level, 3D localization can be simultaneously achieved for indoor and outdoor users, which is also accomplished via the proposed ANM-based estimation algorithm.

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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