The Degrees of Freedom in Wireless Line-of-Sight OAM Multiplexing Systems Using a Circular Array of Receiving Antennas

2015 Fifth International Conference on Advanced Computing & Communication Technologies Pub Date : 2015-02-21 DOI:10.1109/ACCT.2015.52

K. A. Opare, Yujun Kuang, J. J. Kponyo, K. Nwizege, Zhang En-zhan

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引用次数: 20

Abstract

A wireless multiple-input multiple-output (MIMO) multiplexing system consists of multiple transmit and receive antennas. The channel capacity of such systems does not merely depend on the number of degrees of freedom (DoF) it can support, but also on their gains, represented by the singular values of the channel matrix. A radio frequency based orbital angular momentum (OAM) communication system can be modeled as a MIMO multiplexing system. In the ideal case, message signals transmitted on the same frequency using multiple OAM modes can be separated by using a circular array of receive antennas. In this paper, we characterize circular arrays using three parameters: angular spacing between consecutive antennas, angular span of the elements within the array and the standard deviation of the angular spacing. We show that, the effective degrees of freedom in RF based OAM communication systems depend on the characteristics of the circular array used to receive the transmitted OAM signals.

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使用圆形接收天线阵列的无线视距OAM复用系统的自由度

无线多输入多输出(MIMO)多路复用系统由多个发射和接收天线组成。这种系统的信道容量不仅取决于它可以支持的自由度(DoF)的数量，还取决于它们的增益，由信道矩阵的奇异值表示。基于射频的轨道角动量(OAM)通信系统可以建模为MIMO多路复用系统。在理想情况下，使用多个OAM模式在同一频率上传输的消息信号可以通过使用圆形接收天线阵列来分离。在本文中，我们使用三个参数来描述圆形阵列:连续天线之间的角间距，阵列内元素的角间距和角间距的标准差。我们表明，基于射频的OAM通信系统的有效自由度取决于用于接收发射OAM信号的圆形阵列的特性。

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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2015 Fifth International Conference on Advanced Computing & Communication Technologies

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