Large scaled multi-user MIMO system so called massive MIMO systems for future wireless communication networks
Large scaled multi-user MIMO system so called massive MIMO systems for future wireless communication networks
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发表时间：
2013-11
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通讯作者：
Y. Mehmood;W. Afzal;F. Ahmad;U. Younas;Imran Rashid;I. Mehmood
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作者：
Y. Mehmood;W. Afzal;F. Ahmad;U. Younas;Imran Rashid;I. Mehmood
大规模或大规模的多输入多输出（MIMO）系统由于可实现的高数据速率和未来无线网络的连接可靠性而获得了巨大的考虑。由于在发射机或接收机处定位多个天线而导致的多个信号路径是大吞吐量的原因。使用小天线阵列的最终目标是每个单个天线将具有小的功耗。无线应用数量的快速增长对传统MIMO系统的信道容量、能量和频谱效率提出了一些限制。克服这些限制的可能解决方案之一是在基站处或在一定程度上在用户设备（UE）上使用大天线阵列。在部署大规模MIMO系统之前必须考虑的基本因素包括广播模型、信道估计、应用的放置方式、上行链路和下行链路的好处和预编码过程、预期可实现的能量和频谱效率等。作者讨论了大规模MIMO系统的部署场景，最好的可能的下行链路预编码方案，最大可实现的吞吐量，能量和频谱效率。
The massive or large scaled multiple input multiple output (MIMO) systems have gained huge consideration due to high achievable data rates and connection reliability for future wireless networks. Multiple signal paths due to multiple antennas positioned at transmitter or receiver are responsible for large throughput. The eventual objective of using array of small antennas is that each single antenna will have small power consumption. The rapid increase in the number of wireless applications has put some limitations on conventional MIMO systems on channel capacity, energy and spectral efficiency. One of the possible solutions to overcome these limitations is to use large antenna arrays at the base stations or to some extent on the user equipments (UEs). The essential factors that must be considered before the deployment of massive MIMO systems include the broadcast models, channel estimation, placement ways with applications, uplink & downlink benefits and precoding procedures, expected achievable energy & spectral efficiencies, etc. In this article a comparison of massive MIMO is made with conventional MIMO. The authors discussed the massive MIMO system deployment scenarios, the best possible downlink precoding scheme for maximum achievable throughput, energy and spectral efficiency.