A CSI Acquisition Approach for mm Wave Massive MIMO

被引：3

作者：

Shanzhi Chen ^{[1
]}

Qiubin Gao ^{[1
]}

Runhua Chen ^{[1
]}

Hui Li ^{[1
]}

Shaohui Sun ^{[1
]}

Zhengxuan Liu ^{[1
]}

机构：

[1] State Key Lab of Wireless Mobile Communication,China Academy of Telecommunication Technology

来源：

中国通信 | 2019年 / 16卷 / 09期

基金：

中国国家自然科学基金;

关键词：

codebook; CSI acquisition; hybrid beamforming;

D O I：

暂无

中图分类号：

TN929.5 [移动通信];

学科分类号：

080402 ; 080904 ; 0810 ; 081001 ;

摘要：

Massive Multiple-Input Multiple-Output(MIMO) is considered as a key technology for 4 G and 5 G wireless communication systems to improve spectrum efficiency by supporting large number of concurrent users. In addition, for the target frequency band of 5 G system, mm Wave band, massive MIMO is pivotal in compensating the high pathloss. In this paper, we investigate the channel state information(CSI) acquisition problem for mm Wave massive MIMO. With hybrid analog-digital antenna architecture, how to derive the analog beamforming and digital beamforming is studied. An iterative analog beam acquisition approach is proposed to save system overhead and reduce beam searching complexity. Regarding the digital beamforming, a grouping based codebook is proposed to facilitate CSI feedback. The codebook is then extended to incorporate also analog beam acquisition. Furthermore, channel reciprocity is exploited to save CSI reporting overhead and a two-stage approach is proposed to fully utilize the channel reciprocity at both mobile station and base station side and accelerate the CSI acquisition procedure.

引用

页码：1 / 14

页数：14