摘要
大规模多天线系统可以在多用户场景中提供大的网络容量.从理论上看,大规模多天线系统获得空间域增益的前提条件是传播环境中的各子信道满足正交条件.然而,在实际情况中,受相关衰落信道的影响,各子信道间并不完全满足两两成对正交.通过研究3种相关衰落信道条件下大规模多天线系统的信道传播特性,对比分析了其信道容量和奇异值分布.仿真结果表明:相关衰落信道条件下,在信道相关系数较小时,可以通过增大天线数目来提升信道性能;而在信道相关系数较大时,增大天线数目对于信道性能的提升缓慢.从而得出相关衰落信道条件下Massive MIMO系统性能与天线数目及其信道相关性有关.
The Massive Multiple Input and Multiple Output （Massive MIMO） system can provide large transmission capacity in multi user scenarios. In theory, the primary condition of the Mas sive MIMO system meets that the sub channel is asymptotically orthogonal. However, in prac tice, due to the correlated effect of fading channels, the sub channels are not exactly orthogonal to each other in pairs. In this paper, the transmission properties of Massive MIMO under three types of correlated fading channels are investigated. The channel capacity and singular value dis tribution are also compared and analyzed. Simulation results show that, Massive MIMO perform ance can be improved by increasing the number of antennas when the channel correlation coefficient is small. However, when the channel correlation coefficient is large, increasing the number of antennas is not effective. The performance of the Massive MIMO system under correlated fading channels is related to the number of antennas and channel correlation.
作者
韩柏涛
陶成
王凯
HAN Botao;TAO Cheng;WANG Kai(School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100041,China;National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China)
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2018年第5期34-39,46,共7页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
中央高校基本科研业务费专项资金(2017JBM016)
国家自然科学基金(61471027)
东南大学移动通信国家重点实验室开放研究基金(2017D01)~~
关键词
大规模多天线
无线信道
信道测量
信道容量
奇异值分布
Massive MIMO
wireless channel
channel measurement
channel capacity
singular value distribution
