Empirical Evaluation of Indoor Multi-User MIMO Channels with Linear and Planar Large Antenna Arrays

被引:0
|
作者
Zhang, Bei [1 ]
Zhong, Zhangdui [1 ]
Ai, Bo [1 ]
He, Ruisi [1 ]
Tufvesson, Fredrik [2 ]
Flordelis, Jose [2 ]
Wang, Qi [1 ]
Li, Jianzhi [1 ]
机构
[1] Beijing Jiaotong Univ, State Key Lab Rail Traff Control & Safety, Beijing, Peoples R China
[2] Lund Univ, Dept Elect & Informat Technol, Lund, Sweden
基金
中国国家自然科学基金;
关键词
MASSIVE MIMO; WIRELESS;
D O I
10.1109/PIMRC.2017.8292167
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Channel measurements of large-scale multiuser multiple-input multiple-output (MU-MIMO) radio propagation channels are presented. In the setup, three users with patch antennas communicate simultaneously with a base station (BS) equipped with a large antenna array in an indoor environment. Both a uniform linear array (ULA) and a uniform planar array (UPA) are used, and their relative ability to separate MU-MIMO signals is examined. At the mobile station (MS) side, the effect of inter-user spacing (i.e., the spacing between different users) is investigated. This evaluation is done by means of the correlation matrix distance metric (between each pair of users) and the singular value spread of the system. Our investigation shows that the users can be spatially separated in a large antenna array system in line-of-sight propagation conditions even when they are located close to each other. Furthermore, the users tend to be more separable when a ULA is adopted, compared to using a UPA. Finally, we also confirm that larger user separation distance results in increased channel orthogonality by measurements.
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页数:6
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