摘要
未来第5代移动通信系统(5G)中无线数据业务量的爆发性增长推动着研究人员发展新的颠覆性技术。作为5G的关键候选技术之一,大规模多入多出(MIMO)在基站使用远超激活终端数的天线,能增加一个数量级的频谱效率并大幅降低发射功率。首先介绍了大规模MIMO的系统模型和理论性能,其次分析和归纳了在信道测量与建模、信道信息获取、传输方法的研究成果,然后简述了实验和测试进展,最后讨论了未来研究方向。
The explosive growth of wireless data traffic in future fifth generation （5G） mobile communication systems has pushed researchers to develop new disruptive technologies. Massive multiple - inputmultiple- output（MIMO）,as one of 5G key technology candidates, can increase tenfold spectral efficiency and save the transmit power greatly through the use of a large excess of service antennas in base stations over active terminals. This paper presents an overview of massive MIMO with regard to system models and theoretical performance,channel measurement and modeling,channel state information acquisition,transmission tech- niques,experimental and test results. It also discusses several future research topics.
出处
《电讯技术》
北大核心
2017年第5期608-614,共7页
Telecommunication Engineering
关键词
大规模MIMO
5G
频谱效率
导频污染
信道建模
信道信息获取
预编码
massive MIMO
5G
spectral efficiency
pilo t contamination
channel modeling
channel infor-mation acquisition
precoding
