Wireless energy transfer in RIS-aided cell-free massive MIMO systems: Opportunities and challenges

E Shi, J Zhang, S Chen, J Zheng… - IEEE …, 2022 - ieeexplore.ieee.org
In future 6G mobile networks, the Internet-of-Everything (IoE) is expected to provide
extremely massive connectivity for small battery-powered devices. Indeed, massive devices …

[HTML][HTML] A survey on user-centric cell-free massive MIMO systems

S Chen, J Zhang, J Zhang, E Björnson, B Ai - Digital Communications and …, 2022 - Elsevier
The mobile data traffic has been exponentially growing during the last several decades. This
was enabled by the densification of the network infrastructure in terms of increased cell …

Uplink performance of RIS-aided cell-free massive MIMO system with electromagnetic interference

E Shi, J Zhang, DWK Ng, B Ai - IEEE Journal on Selected Areas …, 2023 - ieeexplore.ieee.org
Cell-free (CF) massive multiple-input multiple-output (MIMO) and reconfigurable intelligent
surface (RIS) are two promising technologies for realizing future beyond-fifth generation …

Resource allocation for cell-free massive MIMO-enabled URLLC downlink systems

Q Peng, H Ren, C Pan, N Liu… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
Ultra-Reliable and low-latency communication (URLLC) is a pivotal technique for enabling
the wireless control over industrial Internet-of-Things (IIoT) devices. By deploying distributed …

Cooperative beamforming for RIS-aided cell-free massive MIMO networks

X Ma, D Zhang, M Xiao, C Huang… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
The combination of cell-free massive multiple-input multiple-output (CF-mMIMO) and
reconfigurable intelligent surface (RIS) is envisioned as a promising paradigm to improve …

Spatially correlated reconfigurable intelligent surfaces-aided cell-free massive MIMO systems

E Shi, J Zhang, R He, H Jiao, Z Wang… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
Reconfigurable intelligent surfaces (RISs) and cell-free (CF) massive multiple-input multiple-
output (MIMO) are two promising technologies for realizing beyond-fifth generation (5G) …

Uplink precoding design for cell-free massive MIMO with iteratively weighted MMSE

Z Wang, J Zhang, HQ Ngo, B Ai… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
In this paper, we investigate a cell-free massive multiple-input multiple-output system with
both access points and user equipments equipped with multiple antennas over the …

Federated learning-based cell-free massive MIMO system for privacy-preserving

J Zhang, J Zhang, DWK Ng, B Ai - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
Cell-free massive MIMO (CF mMIMO) is a promising next generation wireless architecture to
realize federated learning (FL). However, sensitive information of user equipments (UEs) …

Experimental performance evaluation of cell-free massive MIMO systems using COTS RRU with OTA reciprocity calibration and phase synchronization

Y Cao, P Wang, K Zheng, X Liang, D Liu… - IEEE Journal on …, 2023 - ieeexplore.ieee.org
Downlink coherent multiuser transmission is an essential technique for cell-free massive
multiple-input multiple-output (MIMO) systems, and the availability of channel state …

Spatially correlated RIS-aided CF massive MIMO systems with generalized MR combining

E Shi, J Zhang, Y Du, Z Wang, B Ai… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
In this correspondence, we study the uplink ergodic net throughput of a spatially correlated
reconfigurable intelligent surface (RIS)-aided cell-free (CF) massive multiple-input multiple …