Results 71 to 80 of about 8,525,169 (240)

Cell-Free Massive MIMO SWIPT With Beyond Diagonal Reconfigurable Intelligent Surfaces [PDF]

IEEE Transactions on Communications
We investigate the integration of beyond-diagonal reconfigurable intelligent surfaces (BD-RISs) into cell-free massive multiple-input multiple-output (CF-mMIMO) systems to enhance simultaneous wireless information and power transfer (SWIPT).
Thien Duc Hua, M. Mohammadi, H. Ngo, M. Matthaiou   +3 more
semanticscholar   +1 more source

Cell-Free Massive MIMO for 6G Wireless Communication Networks

, 2021
The recently commercialized fifth-generation (5G) wireless networks have achieved many improvements, including air interface enhancement, spectrum expansion, and network intensification by several key technologies, such as massive multiple-input multiple-
Yu, Xianghao, Letaief, Khaled B., He, Hengtao, Song, Shenghui, Zhang, Jun   +4 more
core   +1 more source

Scalable Integrated Sensing and Communications for Multi-Target Detection and Tracking in Cell-Free Massive MIMO: A Unified Framework [PDF]

IEEE Transactions on Communications
This paper investigates a cell-free massive MIMO (multiple-input multiple-output) system where distributed access points (APs) perform integrated sensing and communications (ISAC) tasks, enabling simultaneous user communication and target detection ...
Sergi Liesegang, Stefano Buzzi, C. D’Andrea   +2 more
semanticscholar   +1 more source

On the Impact of Hardware Impairments on Massive MIMO [PDF]

, 2014
Massive multi-user (MU) multiple-input multiple-output (MIMO) systems are one possible key technology for next generation wireless communication systems. Claims have been made that massive MU-MIMO will increase both the radiated energy efficiency as well
Fager, Christian, Svensson, Lars,, Fager, Christian,, Sanchez Perez, Cesar,, Svensson, Lars, Giuseppe Durisi, Durisi, Giuseppe,, Landin, Per,, Per Landin, Eriksson, Thomas, Gustavsson, Ulf,, Thomas Eriksson, Cesar Sanchez-Perez, Sanchez Perez, Cesar, Lars Svensson, Hausmair, Katharina, Gustavsson, Ulf, Christian Fager, Katharina Hausmair, Eriksson, Thomas,, Landin, Per, Durisi, Giuseppe, Hausmair, Katharina,, Fredrik Athley, Sánchez-Pérez, Cesar, Landin, Per N., Ulf Gustavsson, Athley, Fredrik,, Athley, Fredrik   +28 more
core   +1 more source

Towards Cell-Free Massive MIMO: A Measurement-Based Analysis

IEEE Access, 2022
Cell-free widely distributed massive multiple-input multiple-output (MIMO) systems utilize radio units spread out over a large geographical area. The radio signal of a user equipment (UE) is coherently detected by a subset of radio units (RUs) in the ...
David Loschenbrand, Markus Hofer, Laura Bernado, Stefan Zelenbaba, Thomas Zemen   +4 more
doaj   +1 more source

Non-Centralized Quantum Neural Networks for Cell-Free MIMO Systems [PDF]

This paper propose a two-stage quantum neural network (QNN) framework for cell-free multiple-input and multiple-output (MIMO) wireless communication systems.
Shin, Hyundong, Duong, Trung Q., Karagiannidis, George K., Narottama, Bhaskara, Canberk, Berk, Cotton, Simon L.   +5 more
core   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Optimally Supporting IoT with Cell-Free Massive MIMO [PDF]

GLOBECOM 2020 - 2020 IEEE Global Communications Conference, 2020
We study internet of things (IoT) systems supported by cell-free (CF) massive MIMO (mMIMO) with optimal linear channel estimation. For the uplink, we consider optimal linear MIMO receiver and obtain an uplink SINR approximation involving only large-scale fading coefficients using random matrix (RM) theory. Using this approximation we design several max-
Hangsong Yan, Alexei Ashikhmin, Hong Yang 0001   +2 more
openaire   +4 more sources

Cell-Free Massive MIMO Detection: A Distributed Expectation Propagation Approach [PDF]

, 2023
Cell-free massive MIMO is one of the core technologies for future wireless networks. It is expected to bring enormous benefits, including ultra-high reliability, data throughput, energy efficiency, and uniform coverage. As a radically distributed system,
Song, S. H., Yu, Xianghao, Letaief, Khaled B., He, Hengtao, Zhang, Jun   +4 more
core   +1 more source

Performance Analysis of RIS-Assisted Cell-Free Massive MIMO Systems With Transceiver Hardware Impairments

IEEE Transactions on Communications, 2023
Integrating reconfigurable intelligent surface (RIS) into cell-free massive multiple-input multiple-output (MIMO) is a promising approach to enhance the coverage quality, spectral efficiency (SE), and energy efficiency.
Yao Zhang, Wenchao Xia, Haitao Zhao, G. Zheng, S. Lambotharan, Longxiang Yang   +5 more
semanticscholar   +1 more source