Linear angular momentum multiplexing is a new method for providing highly spectrally efficient short-range communication between a transmitter and receiver, where one may move at speed transverse to the propagation. Such applications include rail, vehicle and hyperloop transport systems communicating with fixed infrastructure on the ground. This paper describes how the scientific concept of linear angular momentum multiplexing evolves from orbital angular momentum multiplexing. The essential parameters for implementing this concept are a long array at least at one of the ends of the link; antenna element radiation characteristics and the array element spacing relative to the propagation distance. These parameters are also backed by short-range measurements carried out at 2.4 GHz used to model the Rice fading channel and determine resilience to multipath fading.

中文翻译：

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线性角动量复用——天线阵列的概念化和实验评估

线性角动量复用是一种新方法，用于在发射器和接收器之间提供高频谱效率的短程通信，其中一个可以以横向于传播的速度移动。此类应用包括与地面固定基础设施通信的铁路、车辆和超级高铁运输系统。本文描述了线性角动量复用的科学概念如何从轨道角动量复用演变而来。实现这一概念的基本参数是至少在链路一端的长数组；天线振子的辐射特性和阵元间距与传播距离的关系。这些参数也得到了在 2 处进行的短程测量的支持。