标题： 双边近场信道的空间带宽对于线性大规模天线阵列系统 显示英文标题

标题： Spatial Bandwidth of Bilateral Near-Field Channels for Linear Large-Scale Antenna Array System

摘要： 本文分析了大规模MIMO系统中视线（LoS）信道的空间带宽。 对于放置在三维空间中随机位置的收发器的线性大规模天线阵列（LSAA），推导出一个简单但精确的闭式表达式来表征空间带宽。 还提供了对LSAA空间带宽特性的后续分析，从而得出双工近场信道有效自由度（EDoF）的近似表达式。 有趣的是，如本工作所证明的，当发射和接收阵列共面，并且接收阵列垂直于连接发射和接收阵列中心的轴时，LoS信道的EDoF被发现近似最大化。 显示英文摘要

摘要： This paper analyzes the spatial bandwidth of line-of-sight (LoS) channels in massive MIMO systems. For the linear large-scale antenna arrays (LSAA) of transceivers placed in random locations in 3D space, a simple but accurate closed-form expression is derived to characterize the spatial bandwidth. Subsequent analysis of the LSAA's spatial bandwidth properties is also provided, leading to the formulation of an approximate expression for the effective degrees of freedom (EDoF) of bilateral near-field channels. Interestingly, as proved in this work, when the transmit and receive arrays are coplanar, with the receive array positioned perpendicular to the axis joining the centroids of the transmit and receive arrays, the EDoF of the LoS channel is found to be approximately maximized.