User Selection in Reconfigurable Intelligent Surface Assisted Communication Systems
Journal article
Gan, X., Zhong, C., Zhu, Y. and Zhong, Z. (2021). User Selection in Reconfigurable Intelligent Surface Assisted Communication Systems. IEEE Communications Letters. https://doi.org/10.1109/lcomm.2020.3048782
Authors | Gan, X., Zhong, C., Zhu, Y. and Zhong, Z. |
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Abstract | This paper presents a detailed investigation on the performance of reconfigurable intelligent surface (RIS)-assisted communication system with user scheduling. Depending on the availability of channel state information (CSI) at the RIS, two separate scenarios are considered, namely without CSI and with CSI. Closed-form expressions are derived for the ergodic capacity of the system in both scenarios. It is found that CSI has a significant impact on the performance of the system. Without CSI, the RIS provides an array gain of N, where N is the number of reflecting elements, and user scheduling provides an multi-user gain of log logM, where M is the number of users. With CSI, the RIS provides an array gain of N2, while no multi-user diversity gain can be obtained. |
Year | 2021 |
Journal | IEEE Communications Letters |
Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
ISSN | 1089-7798 |
Digital Object Identifier (DOI) | https://doi.org/10.1109/lcomm.2020.3048782 |
Publication dates | |
01 Jan 2021 | |
Publication process dates | |
Deposited | 04 Jan 2021 |
Accepted author manuscript | License File Access Level Open |
Page range | 1-1 |
https://openresearch.lsbu.ac.uk/item/8vvxy
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