Theory and application of reconfigurable intelligent surfaces with integrated sensing

集成传感可重构智能表面理论与应用

• 批准号: 2333023
• 负责人: SEYEDMOHAMMADRE Faghih Imani
• 金额: $ 21.38万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-03-01 至 2026-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2333023&HistoricalAwards=false
• 关键词: Theory; application; reconfigurable; intelligent; surfaces

One major challenge in achieving uninterrupted wireless communications with high data rate is the loss due to propagation environment, such as signal blockage by buildings or signal diffraction by various surfaces. To circumvent these issues, the technique of using reconfigurable intelligent surfaces (RIS) has been proposed. RIS can redirect reflected signals toward intended users, thus avoiding signal blockage, mitigating interference, or increasing security. Engineering the desired propagation environment, however, requires knowledge about important parameters such as the directions of the users or transmitters to be available at the RIS. To address this need, this project will develop a new type of hybrid reconfigurable intelligent surfaces (HRIS). The HRIS will be designed to sense the incident waves on the entire surface, deduce relevant information, such as the directions of users and transmitters, and reconfigure their reflection patterns accordingly. By developing the HRIS, this project paves the way for the implementation of a truly smart and autonomous propagation environment. This project also examines other opportunities that can be enabled by the HRIS to sense the environment with high spatial resolution, such as imaging objects for context-aware homes and buildings or threat detection. The research project is complemented by a comprehensive educational plan to engage graduate and undergraduate students in designing metasurfaces and HRIS, developing compressive sensing techniques, and devising intelligent electromagnetic environments. This project also includes several undergraduate-led efforts where they will learn to use the HRIS to track devices and provide them with focused beams for wireless power transfer (WPT). The resulting adaptive WPT demonstrations will be used in interactive workshops on topics of electromagnetic research and emerging trends in wireless communications and sensing, as well as at outreach events.This research project will outline the design of HRIS and experimentally demonstrate their utility in typical wireless communications settings. It will thus make innovative contributions including 1) the design of a novel metasurface that allows for reconfigurable reflection and sensing of the incident wave, 2) the development and experimental validation of novel algorithms for compressive sensing of the propagation environment with high spatial resolution using only a few receiving units, 3) a smart adaptive communications link where the HRIS detects the transmitter and users and transform its reflection patterns accordingly, and 4) development and experimental validation of novel imaging configurations where the scattered wireless communications signals (signals of opportunities) are collected by the HRIS and processed to retrieve reflectivity maps.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

实现高数据速率不间断无线通信的一大挑战是传播环境造成的损耗，例如建筑物的信号阻挡或各种表面的信号衍射。为了解决这些问题，人们提出了使用可重构智能表面（RIS）的技术。 RIS 可以将反射信号重定向到目标用户，从而避免信号阻塞、减轻干扰或提高安全性。然而，设计所需的传播环境需要了解重要参数，例如 RIS 上可用的用户或发射机的方向。为了满足这一需求，该项目将开发一种新型混合可重构智能表面（HRIS）。 HRIS将被设计为感测整个表面上的入射波，推断出相关信息，例如用户和发射器的方向，并相应地重新配置它们的反射模式。通过开发 HRIS，该项目为实现真正智能和自主的传播环境铺平了道路。该项目还研究了 HRIS 可以实现的以高空间分辨率感知环境的其他机会，例如用于环境感知家庭和建筑物的成像对象或威胁检测。该研究项目还辅以一项全面的教育计划，旨在让研究生和本科生参与设计超表面和 HRIS、开发压缩传感技术以及设计智能电磁环境。该项目还包括几项本科生主导的工作，他们将学习使用 HRIS 跟踪设备并为它们提供用于无线功率传输 (WPT) 的聚焦光束。由此产生的自适应 WPT 演示将用于有关电磁研究和无线通信和传感新兴趋势主题的互动研讨会，以及外展活动。该研究项目将概述 HRIS 的设计，并通过实验证明其在典型无线通信中的实用性设置。因此，它将做出创新贡献，包括1）新型超表面的设计，允许对入射波进行可重新配置的反射和感测，2）仅使用高空间分辨率对传播环境进行压缩感测的新颖算法的开发和实验验证一些接收单元，3）智能自适应通信链路，其中 HRIS 检测发射器和用户并相应地转换其反射模式，以及 4）新型成像配置的开发和实验验证，其中分散的无线通信信号（机会信号）由收集HRIS 并进行处理以检索反射率图。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。