The spectral efficiency of wireless networks can be made nearly infinitely large by deploying many antennas, but the deployment of very many antennas requires new topologies beyond the compact and discrete antenna arrays used by conventional base stations. In this paper, we consider the large intelligent surface scenario where small antennas are deployed on a large and dense two-dimensional grid. Building on the heritage of MIMO, we first analyze the beamwidth and sidelobes when transmitting from large intelligent surfaces. We compare different precoding schemes and determine how to optimize the transmit power with respect to different utility functions.

翻译：通过部署许多天线可以使无线网络的光谱效率几乎无限地提高,但部署许多天线需要除常规基地台所使用的紧凑和离散天线阵列之外的新地形。 在本文中,我们考虑了小型天线部署在大型和稠密的二维网格上的大型智能地表情景。在MIMO的遗产基础上,我们首先从大型智能表面传输时分析波束和侧边线。我们比较了不同的预编码计划并确定如何优化不同功用功能的传输能力。