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RIS-Assisted MIMO Channel Measurements and Characteristics Analysis for 6G Wireless Communication Systems

Sun, Yingzhuo ; Wang, Cheng Xiang ; Xu, Yingjie LU orcid ; Xin, Lijian ; Huang, Jialing ; Huang, Jie ; Qin, Qibo ; Gao, Xinyu ; Guo, Bolun and Cui, Tie Jun , et al. (2025) In IEEE Transactions on Vehicular Technology
Abstract

Reconfigurable intelligent surface (RIS) can manipulate the electromagnetic (EM) waves in wireless channels and thus is promising for the sixth generation wireless communication systems. However, there exists little research on RIS channel measurements, which are important for the communication system design. In this paper, channel measurements are carried out in anechoic chamber, outdoor, and indoor environments. For anechoic chamber measurements, the insertion loss, EM response reciprocity, and received power are analyzed. It is found that RIS can fulfill EM response reciprocity. It is also found that the performance of RIS beamforming in the coplane configuration is better than that in the non-coplane configuration. In outdoor... (More)

Reconfigurable intelligent surface (RIS) can manipulate the electromagnetic (EM) waves in wireless channels and thus is promising for the sixth generation wireless communication systems. However, there exists little research on RIS channel measurements, which are important for the communication system design. In this paper, channel measurements are carried out in anechoic chamber, outdoor, and indoor environments. For anechoic chamber measurements, the insertion loss, EM response reciprocity, and received power are analyzed. It is found that RIS can fulfill EM response reciprocity. It is also found that the performance of RIS beamforming in the coplane configuration is better than that in the non-coplane configuration. In outdoor measurements, the cumulative distribution functions of large-scale parameters (LSPs) are obtained to explore the relationship between LSPs and heights. Results show that the RIS-user equipment channel is more sensitive to the height variation than the base station-RIS channel. For indoor measurements, the angular power spectral density, spatial cross-correlation function, and channel capacity are investigated. It is found that RIS with near-field coding and a larger size can bring a higher gain than RIS with far-field coding and a smaller size. The normalized power and code differences between near-field and far-field coding are defined to verify the RIS Rayleigh distance. It can be found that the value of the theoretical RIS Rayleigh distance is almost the same as the distance where the defined normalized differences become zero.

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organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
6G wireless communication systems, channel characteristics, channel measurements, reconfigurable intelligent surface (RIS)
in
IEEE Transactions on Vehicular Technology
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:105003655309
ISSN
0018-9545
DOI
10.1109/TVT.2025.3562703
language
English
LU publication?
yes
id
c57d831a-f7e5-4137-94c7-fa04b45a28f1
date added to LUP
2025-09-29 13:06:59
date last changed
2025-09-29 13:07:09
@article{c57d831a-f7e5-4137-94c7-fa04b45a28f1,
  abstract     = {{<p>Reconfigurable intelligent surface (RIS) can manipulate the electromagnetic (EM) waves in wireless channels and thus is promising for the sixth generation wireless communication systems. However, there exists little research on RIS channel measurements, which are important for the communication system design. In this paper, channel measurements are carried out in anechoic chamber, outdoor, and indoor environments. For anechoic chamber measurements, the insertion loss, EM response reciprocity, and received power are analyzed. It is found that RIS can fulfill EM response reciprocity. It is also found that the performance of RIS beamforming in the coplane configuration is better than that in the non-coplane configuration. In outdoor measurements, the cumulative distribution functions of large-scale parameters (LSPs) are obtained to explore the relationship between LSPs and heights. Results show that the RIS-user equipment channel is more sensitive to the height variation than the base station-RIS channel. For indoor measurements, the angular power spectral density, spatial cross-correlation function, and channel capacity are investigated. It is found that RIS with near-field coding and a larger size can bring a higher gain than RIS with far-field coding and a smaller size. The normalized power and code differences between near-field and far-field coding are defined to verify the RIS Rayleigh distance. It can be found that the value of the theoretical RIS Rayleigh distance is almost the same as the distance where the defined normalized differences become zero.</p>}},
  author       = {{Sun, Yingzhuo and Wang, Cheng Xiang and Xu, Yingjie and Xin, Lijian and Huang, Jialing and Huang, Jie and Qin, Qibo and Gao, Xinyu and Guo, Bolun and Cui, Tie Jun and Chen, Yunfei}},
  issn         = {{0018-9545}},
  keywords     = {{6G wireless communication systems; channel characteristics; channel measurements; reconfigurable intelligent surface (RIS)}},
  language     = {{eng}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Vehicular Technology}},
  title        = {{RIS-Assisted MIMO Channel Measurements and Characteristics Analysis for 6G Wireless Communication Systems}},
  url          = {{http://dx.doi.org/10.1109/TVT.2025.3562703}},
  doi          = {{10.1109/TVT.2025.3562703}},
  year         = {{2025}},
}