Indoor massive multiple-input multiple-output channel characterization and performance evaluation

We present a measurement campaign to characterize an indoor massive multiple-input multiple-output （MIMO） channel system, using a 64-element virtual linear array, a 64-element virtual planar array, and a 128-element virtual planar array. The array topologies are generated using a 3D mechanical turnt...

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Bibliographic Details
Published in:Frontiers of information technology & electronic engineering 2017-06, Vol.18 (6), p.773-787
Main Authors: Li, Jian-zhi, Ai, Bo, He, Rui-si, Wang, Qi, Yang, Mi, Zhang, Bei, Guan, Ke, He, Dan-ping, Zhong, Zhang-dui, Zhou, Ting, Li, Nan
Format: Article
Language:English
Subjects:
Bandwidths
Channels
Communications Engineering
Computer Hardware
Computer Science
Computer Systems Organization and Communication Networks
Delay
Electrical Engineering
Electronics and Microelectronics
Ellipticity
Fading
Indoor environments
Information technology
Instrumentation
Line of sight
Linear arrays
Matched filters
Networks
Parameters
Performance evaluation
Propagation
R&D
Research & development
Shadows
Spectrum allocation
Topology
Traffic control
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Summary:We present a measurement campaign to characterize an indoor massive multiple-input multiple-output （MIMO） channel system, using a 64-element virtual linear array, a 64-element virtual planar array, and a 128-element virtual planar array. The array topologies are generated using a 3D mechanical turntable. The measurements are conducted at 2, 4, 6, 11, 15, and 22 GHz, with a large bandwidth of 200 MHz. Both line-of-sight （LOS） and non-LOS （NLOS） propagation scenarios are considered. The typical channel parameters are extracted, including path loss,shadow fading, power delay profile, and root mean square （RMS） delay spread. The frequency dependence of these channel parameters is analyzed. The correlation between shadow fading and RMS delay spread is discussed. In addition, the performance of the standard linear precoder—the matched filter, which can be used for intersymbol interference （ISI） mitigation by shortening the RMS delay spread, is investigated. Other performance measures,such as entropy capacity, Demmel condition number, and channel ellipticity, are analyzed. The measured channels,which are in a rich-scattering indoor environment, are found to achieve a performance close to that in independent and identically distributed Rayleigh channels even in an LOS scenario.
ISSN:2095-9184
2095-9230
DOI:10.1631/FITEE.1700021