Corpus ID: 233296566

Reconfigurable Intelligent Surface-Assisted Cell-Free Massive MIMO Systems Over Spatially-Correlated Channels

@article{Chien2021ReconfigurableIS,
  title={Reconfigurable Intelligent Surface-Assisted Cell-Free Massive MIMO Systems Over Spatially-Correlated Channels},
  author={Trinh Van Chien and Hien Quoc Ngo and Symeon Chatzinotas and Marco di Renzo and Bj{\"o}rn E. Ottersten},
  journal={ArXiv},
  year={2021},
  volume={abs/2104.08648}
}
Cell-Free Massive multiple-input multiple-output (MIMO) and reconfigurable intelligent surface (RIS) are two promising technologies for application to beyond-5G networks. This paper considers Cell-Free Massive MIMO systems with the assistance of an RIS for enhancing the system performance under the presence of spatial correlation among the scattering elements of the RIS. Distributed maximum-ratio processing is considered at the access points (APs). We introduce an aggregated channel estimation… Expand
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An aggregated channel estimation method is introduced that provides sufficient information for data processing and verifies the effectiveness of the proposed system design and the benefits of using RISs in CellFree Massive MIMO systems are quantified. Expand
On the Performance of Reconfigurable Intelligent Surface-Aided Cell-Free Massive MIMO Uplink
The uplink of a reconfigurable intelligent surfaces (RIS)-aided cell-free massive multiple-input multiple-output (MIMO) system is analyzed, where the channel state information (CSI) is estimatedExpand
Beyond Cell-Free MIMO: Energy Efficient Reconfigurable Intelligent Surface Aided Cell-Free MIMO Communications
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This article considers an RIS aided cell-free MIMO system where multiple RISs are deployed around BSs and users to create favorable propagation conditions via reconfigurable reflections in a low-cost way, thereby enhancing cell- free MIMo communications and can achieve a higher energy efficiency than conventional ones. Expand
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