RIS辅助无线通信：原型制作、自适应波束成形及室内/室外现场试验
RIS-Aided Wireless Communications: Prototyping, Adaptive Beamforming, and Indoor/Outdoor Field Trials
AI总结：
本文介绍了一个工作在5.8 GHz频段、含1100个可控单元的RIS原型，提出基于几何阵列特性和接收机反馈的自适应波束成形算法，并通过室内外试验验证其提供26-27 dB功率增益、支持500米32 Mbps传输和1080p视频流畅播放，证明RIS在未来无线通信中的巨大潜力。
摘要：
利用可重构智能表面（RIS）辅助无线通信系统的前景最近受到学术界和工业界的广泛关注。大多数论文基于基础模型进行理论研究，而RIS辅助无线通信的原型制作和真实世界现场试验却很少。在本文中，我们描述了一个新的RIS原型，它由1100个可控单元组成，工作在5.8 GHz频段。我们提出了一种高效的空中配置RIS的算法，该算法利用了几何阵列特性和一个实用的接收机-RIS反馈链路。在我们的室内测试中，发射机和接收机被一堵30厘米厚的混凝土墙隔开，与将RIS替换为铜板的基线情况相比，我们的RIS原型提供了26 dB的功率增益。在短距离室外测量中观察到27 dB的功率增益。我们还进行了长距离测量，并成功地在500米距离上传输了32 Mbps的数据流。一个1080p视频被实时流传输，并且只有在使用RIS时才能流畅播放。RIS的功耗约为1 W。我们的论文生动地证明了RIS是一项非常有前景的未来无线通信技术。
英文摘要：
The prospects of using a Reconfigurable Intelligent Surface (RIS) to aid wireless communication systems have recently received much attention from academia and industry. Most papers make theoretical studies based on elementary models, while the prototyping of RIS-aided wireless communication and real-world field trials are scarce. In this paper, we describe a new RIS prototype consisting of 1100 controllable elements working at 5.8 GHz band. We propose an efficient algorithm for configuring the RIS over the air by exploiting the geometrical array properties and a practical receiver-RIS feedback link. In our indoor test, where the transmitter and receiver are separated by a 30 cm thick concrete wall, our RIS prototype provides a 26 dB power gain compared to the baseline case where the RIS is replaced by a copper plate. A 27 dB power gain was observed in the short-distance outdoor measurement. We also carried out long-distance measurements and successfully transmitted a 32 Mbps data stream over 500 m. A 1080p video was live-streamed and it only played smoothly when the RIS was utilized. The power consumption of the RIS is around 1 W. Our paper is vivid proof that the RIS is a very promising technology for future wireless communications.
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。
