Fluid Antenna Multiple Access
Fluid Antenna Multiple Access
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DOI：
10.1109/twc.2021.3133410
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发表时间：
2020-06
影响因子：
10.4
通讯作者：
Kai‐Kit Wong;K. Tong
中科院分区：
文献类型：
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作者：
Kai‐Kit Wong;K. Tong
流体天线系统代表了一种新兴技术，它使天线能够在预定义的空间中切换其物理位置。本文探讨了在每个移动的用户处使用单个流体天线进行多址接入的可能性，我们将其称为流体天线多址接入（法马）。法马利用干扰所遭受的深度衰落的空间时刻来实现期望信号的有利信道条件，而不需要复杂的信号处理。我们分析法马网络首先推导出中断概率的信号干扰比（SIR）的双重积分形式。然后，我们得到了封闭形式的中断概率上界和平均中断率下界的法马系统，与任意数量的复用器，从法马的复用增益的特点。我们还估计需要多大的位置的数量来实现一个给定的复用增益，使用流体天线具有给定的大小。结果表明，它是可能的法马支持数百个用户在每个用户只使用一个流体天线的几个波长的空间，引起显着的增益在平均网络中断率。
Fluid antenna system represents an emerging technology that enables an antenna to switch its physical location in a predefined space. This paper explores the potential of using a single fluid antenna at each mobile user for multiple access, which we refer to it as fluid antenna multiple access (FAMA). FAMA exploits spatial moments of deep fade suffered by the interference to achieve a favourable channel condition for the desired signal, without requiring sophisticated signal processing. We analyze the FAMA network by first deriving the outage probability of the signal-to-interference ratio (SIR) in a double integral form. We then obtain an outage probability upper bound in closed form and an average outage rate lower bound for the FAMA system, with an arbitrary number of interferers, from which the multiplexing gain of FAMA is characterized. We also estimate how large the number of locations is required to achieve a given multiplexing gain using fluid antennas with a given size. Results show that it is possible for FAMA to support hundreds of users using only one fluid antenna of a few wavelengths of space at each user, giving rise to significant gain in the average network outage rate.