论文标题
3D线性大规模天线阵列通信中的自由度 - 空间带宽方法
Degrees of Freedom in 3D Linear Large-Scale Antenna Array Communications-A Spatial Bandwidth Approach
论文作者
论文摘要
对于使用线性大尺度天线阵列的无线通信，我们定义了接收坐标系和参数化策略，以促进研究三维位置的影响以及阵列对可达到的自由度（DOF）在电视线（LOS）通道中的可实现空间自由度（DOF）的影响。开发了基于空间带宽分析的分析框架，根据该框架，研究了与三个基本正交接收方向相对应的三个基本问题。对于它们，都得出了可实现的空间DOF的准确，简单和可解释的封闭形式的近似值，并且可以确定可预期可用的空间DOF的空间区域。表达式可以很容易地集成到大规模的系统级模拟中。基于分析结果的模拟研究进行了一些有趣且令人惊讶的观察结果。例如，在几乎整个空间多路复用区域中，空间带宽显示出大致恒定。此外，在该区域的重要部分中，最佳接收阵列方向与传输阵列并不平行。
For wireless communications using linear large-scale antenna arrays, we define a receiving coordinate system and parameterization strategy to facilitate the study of the impact of three-dimensional position and rotation of the arrays on the achievable spatial degrees of freedom (DoF) in line-of-sight (LOS) channels. An analytical framework based on spatial bandwidth analysis is developed, under which three elementary problems corresponding to three basic orthogonal receiving directions are investigated. For each of them, accurate, simple, and interpretable closed-form approximations for the achievable spatial DoF are derived, and the spatial region where a sufficient amount of spatial DoF is expected available is determined. The expressions can easily be integrated into large-scale system-level simulations. Some interesting and surprising observations are made from simulation studies based on the analytical results. For instance, the spatial bandwidth is shown to be approximately constant in almost the entire spatial multiplexing region. Moreover, in significant parts of this region, the optimal receive array orientation is not parallel with the transmitting array.
