中文

MIMO:现状与未来聚焦

网络与互联网体系结构 2016-10-18 v1 信息论 math.IT

摘要

发射机和接收机的天线已被操控以增加信号收发容量。几十年来,利用天线中的多单元在特定点形成波束并指向零陷以优化信号传输和接收,对接收功率和信噪比(SNR)产生了巨大的积极影响。然而,由于天线单元操控可在基站和设备终端两处进行,这产生了一种重要方法,即使用多根天线以增加的容量向空间发送和从空间获取信号。该原理被称为多输入多输出(MIMO)。本文讨论了MIMO在最先进及下一代无线系统(5G)中的应用。还讨论了MIMO的四种模型:SISO、SIMO、MISO和MIMO,考虑了来自多径传播的三种信号合并方法:选择合并(SC)、等增益合并(EGC)和最大比合并(MRC)。空间分集和空间复用也作为MIMO的形式进行了讨论。最后,讨论了大规模或超大规模MIMO——一种通过极大规模增加第五代无线系统传输容量的新方法——及其挑战与机遇。关键术语:分集合并技术、空间复用、信道状态信息(CSI)、大规模MIMO。

关键词

引用

@article{arxiv.1610.05209,
  title  = {MIMO: State of the Art and the Future in Focus},
  author = {Mboli Sechang Julius},
  journal= {arXiv preprint arXiv:1610.05209},
  year   = {2016}
}

备注

This is a simple review on the state of the art of MIMO and the future. It tries to address what Massive MIMO which is the MIMO that is expected to work for 5G networks will look like. Another generation of wireless networks is expected by 2020. It is simply written for educational purpose and not any commercial use. It is intended to help those trying to build knowledge in this area