基于数字可编码超表面的无线通信系统设计与实现
Design and Implementation of Wireless Communication System Based on Digital Coding Metasurface

人工电磁超材料因其独特的物理特性不断受到研究者的关注。目前在数字成像、电磁学、雷达等多个领域已有许多超材料的应用实例。本文利用数字可编码超表面(超材料中的一种)设计和实现了一种无线通信系统，在电磁超材料与无线通信之间建立起新的桥梁。此系统利用数字可编码超表面，完成无线信号从基带到射频的直接调制，舍弃了传统无线通信系统中利用混频器等复杂模拟器件完成载波调制的射频架构。同时通过FPGA的硬件开发和实验证明，基于数字可编程超表面的无线通信系统可在3.8 GHz载频下利用FSK (Frequency Shift Keying，频移键控)的数字调制方式正常稳定地传输图片等多媒体信号。这种超表面与无线通信的结合，给构建新型通信系统架构提供了一种崭新的思路和可能。
Artificial electromagnetic metamaterials continue to receive the attention of researchers due to their unique physical properties. There are many application examples of metamaterials in various fields such as digital imaging, electromagnetics, and radar. This paper designs and implements a wireless communication system using a digital coding metasurface (one kind of the metamaterials) to establish a new bridge between electromagnetic metamaterials and wireless communication. The system utilizes a digital coding metasurface to perform direct modulation of the wireless signal from the baseband to the radio frequency. In addition, the experiment based on LabVIEW FPGA proves that the wireless communication system based on metasurface can transmit pictures smoothly and stably at 3.8 GHz with FSK modulation. This combination of metasurface and wireless communication also provides a new idea and possibility to build a new communication system architecture.