利用超表面协同调制电磁波与数字信号以实现可编程无线通信
万向 , 肖朝昆 , 黄鹤 , 肖强 , 许威 , Yueheng Li , Joerg Eisenbeis , 王嘉伟 , 黄梓艾 , 程强 , 金石 , Thomas Zwick , 崔铁军
工程(英文) ›› 2022, Vol. 8 ›› Issue (1) : 86 -95.
利用超表面协同调制电磁波与数字信号以实现可编程无线通信
Joint Modulations of Electromagnetic Waves and Digital Signals on A Single Metasurface Platform to Reach Programmable Wireless Communications
在当前的无线电子信息系统中,数字信号和电磁辐射一般由不同的模块进行处理。本文基于可编程超表面提出了一种将数字信号调制与电磁辐射调控相融合的工作机制。可编程超表面包含大量亚波长尺度的数字编码单元,这些单元的数字状态构成了基于可编程超表面的信号调制与波束控制的口面编码序列。通过妥善设计空域和时域口面编码序列,可按指定方式同时对数字信号和远场方向图进行调控。为了实验验证该工作机制,我们提出了一种可编程无线通信系统。该系统可以产生指定方向的单个波束形成单通道信号传输,也可以产生指定的双波束形成双通道独立信号传输。实验结果很好地验证了可编程通信系统的各项功能。本文的研究成果在第五代/第六代(5G/6G)无线通信中以及无人机、自动驾驶等现代智能电子平台中具有重要的应用前景。
In current wireless communication and electronic systems, digital signals and electromagnetic (EM) radiation are processed by different modules. Here, we propose a mechanism to fuse the modulation of digital signals and the manipulation of EM radiation on a single programmable metasurface. The programmable metasurface consists of massive subwavelength-scale digital coding elements. A set of digital states of all elements forms simultaneous digital information roles for modulation and the wave-control sequence code of the programmable metasurface. By designing digital coding sequences in the spatial and temporal domains, the digital information and far-field patterns of the programmable metasurface can be programmed simultaneously and instantly in desired ways. For the experimental demonstration of the mechanism, we present a programmable wireless communication system. The same system can realize transmissions of digital information in single-channel modes with beam-steerable capability and multichannel modes with multiple independent information. The measured results show the excellent performance of the programmable system. This work provides excellent prospects for applications in fifth- or sixth-generation wireless communications and modern intelligent platforms for unmanned aircrafts and vehicles.
joint radar and communication / programmable metasurface / massive multiple-in and multiple-out
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