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.

实现高数据速率的不间断无线通信的一个主要挑战是由于传播环境造成的损失，例如建筑物阻挡信号或各种表面的信号衍射。为了避免这些问题，提出了使用可重构智能曲面（RIS）的技术。RIS可以将反射信号重定向到预期用户，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的参数，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的混合可重构智能表面（HRIS）。HRIS将被设计用于感知整个表面上的入射波，推断相关信息，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可以实现的其他机会，以高空间分辨率感知环境，例如为环境感知房屋和建筑物或威胁检测成像物体。该研究项目将辅以一项全面的教育计划，让研究生和本科生参与设计超表面和HRIS，开发压缩感知技术，以及设计智能电磁环境。该项目还包括几个本科生领导的努力，他们将学习使用HRIS来跟踪设备，并为无线电力传输（WPT）提供聚焦光束。由此产生的自适应WPT演示将用于关于电磁研究和无线通信和传感新趋势主题的互动讲习班，以及外联活动。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环境中的实用性。因此，它将做出创新的贡献，包括1)设计一种新的超表面，允许入射波的可重构反射和感知，2)开发和实验验证新算法，用于仅使用少数接收单元的高空间分辨率传播环境的压缩感知，3)一个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。4)开发和实验验证新的成像配置，其中由HRIS收集分散的无线通信信号（机会信号）并进行处理以检索反射率图。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。