论文标题
半空间中近场MIMO系统的电磁通道模型
Electromagnetic Channel Model for Near Field MIMO Systems in The Half Space
论文作者
论文摘要
在大多数多输入多数输出（MIMO）通信系统中，可以可靠传输的信息量取决于无线通道的有效自由度（EDOF）。通常，人们可以基于使用自由空间绿色功能构建的电磁（EM）通道模型来对通道矩阵进行建模并研究EDOF。但是，自由空间通道模型的EDOF可能不符合EM仅在地面上方传输时的实际情况。在本文中，我们分析了半空间中离散和连续的光圈MIMO系统的EDOF。我们还提出了一种方法，以快速从Sommerfeld身份中快速计算一半空间中的绿色功能。仿真结果表明，半空间中的EDOF与近场通信之间的差异是不可忽略的，这表明地面对EDOF产生了明显的影响。拟议的研究建立了一个基本的电磁框架，用于半空间中的MIMO无线通信。
In most multiple-input multiple-output (MIMO) communication systems, the amount of information that can be transmitted reliably depends on the effective degrees of freedom (EDoF) of the wireless channel. Conventionally, one can model the channel matrix and study the EDoF, based on an electromagnetic (EM) channel model that is built with the free space Green's function. However, the EDoF of free-space channel model may not fit the practical scenario when EM waves only transmit above the ground. In this paper, we analyze the EDoF for both discrete and continuous aperture MIMO systems in the half space. We also propose an approach to quickly calculate the Green function in the half space from the Sommerfeld identity. Simulation results show that the difference between the EDoF in the half space and that in the free space is non-negligible for the near field communications, which indicates that the ground exerts noticeable influence on EDoF. The proposed study establishes a fundamental electromagnetic framework for MIMO wireless communication in the half space.
