论文标题
大量MIMO的空间约束阵列
Space-Constrained Arrays for Massive MIMO
论文作者
论文摘要
我们分析了配备有五种不同天线拓扑之一之一的基站（BS）的大量多用户（MU-MIMO）系统的行为，空间孔径不受限制或空间约束。我们通过基于射线的通道模型得出归一化的平均干扰（NMI），作为两种情况中每种情况的拓扑比较的度量。基于[1]中水平均匀矩形阵列（HURA）的衍生物，我们为均匀线性阵列（ULA）和均匀的圆形阵列（UCIRA）提供了封闭形式的NMI方程。然后，对于垂直URA（VURA）和均匀的圆柱阵列（Ucyla），我们得出相同的。常见的无约束案例的结果证实了先前的理解，即具有更广泛的方位角足迹辅助性能的拓扑结构。然而，在被空间约束的情况下，性能取决于拓扑提供的角度分辨率，尤其是在海拔中。我们通过观察系统SINR中的相同模式以最小的于点误差（MMSE）处理来确认NMI预测的行为模式。
We analyse the behaviour of a massive multi-user MIMO (MU-MIMO) system comprising a base station (BS) equipped with one of five different antenna topologies for which the spatial aperture is either unconstrained, or space-constrained. We derive the normalized mean interference (NMI) with a ray-based channel model, as a metric for topology comparison in each of the two cases. Based on the derivation for a horizontal uniform rectangular array (HURA) in [1], we provide closed-form NMI equations for the uniform linear array (ULA) and uniform circular array (UCirA). We then derive the same for a vertical URA (VURA) and uniform cylindrical array (UCylA). Results for the commonly-considered unconstrained case confirm the prior understanding that topologies with wider azimuth footprints aid performance. However, in the space-constrained case performance is dictated by the angular resolution afforded by the topology, particularly in elevation. We confirm the behavioural patterns predicted by the NMI by observing the same patterns in the system SINR with minimum mean-squared error (MMSE) processing.
