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arXiv 2103.06361eess.SP
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UAV支持群的空中可重构智能表面

UAV Swarm-Enabled Aerial Reconfigurable Intelligent Surface

Bodong Shang, Rubayet Shafin, Lingjia Liu

摘要:

可重构智能表面(RIS)通过调整无源反射元件的幅度和/或相位来优化信号反射,从而在无线网络中提供巨大的频谱和能量效率。利用无人机的灵活性和机动性,RIS可以安装在无人机上,实现三维信号反射。与传统的地面RIS(TRIS)相比,空中RIS(ARIS)具有更高的部署灵活性,可靠的空对地链路和全景全角度反射。然而,由于无人机的有效载荷和电池容量有限,无人机难以携带具有大量反射元件的RIS。因此,不能保证孔径增益的可缩放性。在实践中,多个无人机可以形成无人机群,以协同启用ARIS。在本文中,我们首先概述了无人机群支持的ARIS(SARIS),包括其动机和与TRIS和ARIS相比的竞争优势,以及其在无线网络中的新的变革性应用。然后,我们解决的关键挑战,设计的SARIS的波束成形设计,SARIS信道估计,和SARIS的部署和移动。接下来,潜在的性能增强的SARIS展示和初步的数值结果进行了讨论。最后,说明了开放的研究机会。

英文摘要:

Reconfigurable intelligent surface (RIS) offers tremendous spectrum and energy efficiency in wireless networks by adjusting the amplitudes and/or phases of passive reflecting elements to optimize signal reflection. With the agility and mobility of unmanned aerial vehicles (UAVs), RIS can be mounted on UAVs to enable three-dimensional signal reflection. Compared to the conventional terrestrial RIS (TRIS), the aerial RIS (ARIS) enjoys higher deployment flexibility, reliable air-to-ground links, and panoramic full-angle reflection. However, due to UAV's limited payload and battery capacity, it is difficult for a UAV to carry a RIS with a large number of reflecting elements. Thus, the scalability of the aperture gain could not be guaranteed. In practice, multiple UAVs can form a UAV swarm to enable the ARIS cooperatively. In this article, we first present an overview of the UAV swarm-enabled ARIS (SARIS), including its motivations and competitive advantages compared to TRIS and ARIS, as well as its new transformative applications in wireless networks. We then address the critical challenges of designing the SARIS by focusing on the beamforming design, SARIS channel estimation, and SARIS's deployment and movement. Next, the potential performance enhancement of SARIS is showcased and discussed with preliminary numerical results. Finally, open research opportunities are illustrated.

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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