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A wireless communication scheme based on space- and frequency-division multiplexing using digital metasurfaces
Nature Electronics ( IF 34.3 ) Pub Date : 2021-03-18 , DOI: 10.1038/s41928-021-00554-4
Lei Zhang , Ming Zheng Chen , Wankai Tang , Jun Yan Dai , Long Miao , Xiao Yang Zhou , Shi Jin , Qiang Cheng , Tie Jun Cui

Digitally programmable metasurfaces are of potential use in wireless multiplexing techniques because they can encode and transmit information without using traditional radio-frequency components such as antennas or mixers. Space–time-coding digital metasurfaces can, in particular, manipulate the propagation direction and harmonic power distribution of electromagnetic waves, making them suitable for space- and frequency-division multiplexing. However, while digital metasurfaces have been used for wireless communication, these systems could implement signal modulation only in the time domain. Here, we report a wireless communication scheme that uses space–time-coding digital metasurfaces to implement both space- and frequency-division multiplexing. By encoding space–time-coding matrices through multiple channels, digital messages can be directly transmitted to different users at different locations simultaneously, without the need for digital-to-analogue conversion and mixing processes. To illustrate this approach, we have built a dual-channel wireless communication system based on a two-bit space–time-coding digital metasurface and use it to transmit two different pictures to two users simultaneously in real time.



中文翻译:

一种基于使用数字超表面的空频和频分复用的无线通信方案

数字可编程超表面在无线多路复用技术中具有潜在用途,因为它们可以在不使用传统射频组件(如天线或混频器)的情况下编码和传输信息。空时编码数字超表面尤其可以控制电磁波的传播方向和谐波功率分布,使其适用于空分和频分复用。然而,虽然数字超表面已用于无线通信,但这些系统只能在时域中实现信号调制。在这里,我们报告了一种无线通信方案,该方案使用时空编码数字超表面来实现空分复用和频分复用。通过多个通道对空时编码矩阵进行编码,数字信息可以直接同时传送给不同地点的不同用户,无需进行数模转换和混合过程。为了说明这种方法,我们构建了一个基于两位空时编码数字超表面的双通道无线通信系统,并使用它向两个用户同时实时传输两个不同的图片。

更新日期:2021-03-18
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