RESEARCH STATUS AND PROSPECTS OF ORBITAL ANGULAR MOMENTUM TECHNOLOGY IN WIRELESS COMMUNICATION

IF 6.7 1区计算机科学 Q1 Physics and Astronomy

Progress in Electromagnetics Research-Pier Pub Date : 2020-01-01 DOI:10.2528/pier20091104

Feng Zheng, Yijian Chen, Siwei Ji, Gaoming Duan

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引用次数: 13

Abstract

It becomes more and more challenging to satisfy the long-term demand of transmission capacity in wireless networks if we limit our research within the frame of traditional electromagnetic wave characteristics (e.g., frequency, amplitude, phase and polarization). The potential of orbital angular momentum (OAM) for unleashing new capacity in the severely congested spectrum of commercial communication systems is generating great interest in wireless communication field. The OAM vortex wave/beam has different topological charges, which are orthogonal to each other. It provides a new way for multiplexing in wireless communications. Electromagnetic wave or synthetic beam carrying OAM has a spiral wavefront phase structure, which may provide a new degree of freedom or better orthogonality in spatial domain. In this paper, we introduce the fundamental theory of OAM. Then, OAM generation and reception methods are equally demonstrated. Furthermore, we present the latest development of OAM in wireless communication. We further discuss the controversial topic “whether OAM provides a new degree of freedom” and illustrate our views on the relationship between OAM and MIMO. Finally, we suggest some open research directions of OAM.

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轨道角动量技术在无线通信中的研究现状与展望

如果将研究局限在传统的电磁波特性(如频率、幅度、相位和极化)框架内，将越来越难以满足无线网络对传输容量的长期需求。轨道角动量(OAM)在商业通信系统严重拥挤的频谱中释放新容量的潜力引起了无线通信领域的极大兴趣。涡旋波束具有不同的拓扑电荷，它们彼此正交。它为无线通信中的多路复用提供了一种新的途径。携带OAM的电磁波或合成波束具有螺旋波前相位结构，可在空间域上提供新的自由度或更好的正交性。本文介绍了OAM的基本理论。然后，对OAM的产生和接收方法进行了论证。此外，本文还介绍了OAM在无线通信中的最新进展。我们进一步讨论了有争议的话题“是否OAM提供了一个新的自由度”，并阐述了我们对OAM和MIMO之间关系的看法。最后，提出了OAM的一些开放研究方向。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Progress in Electromagnetics Research-Pier 物理-电信学

CiteScore

7.20

自引率

3.00%

发文量

审稿时长

1.3 months

期刊介绍： Progress In Electromagnetics Research (PIER) publishes peer-reviewed original and comprehensive articles on all aspects of electromagnetic theory and applications. This is an open access, on-line journal PIER (E-ISSN 1559-8985). It has been first published as a monograph series on Electromagnetic Waves (ISSN 1070-4698) in 1989. It is freely available to all readers via the Internet.