Results 11 to 20 of about 20,641 (239)
Ubiquitous cell-free Massive MIMO communications [PDF]
EURASIP Journal on Wireless Communications and Networking, 2019 Since the first cellular networks were trialled in the 1970s, we have witnessed an incredible wireless revolution. From 1G to 4G, the massive traffic growth has been managed by a combination of wider bandwidths, refined radio interfaces, and network ...
Giovanni Interdonato +4 more
doaj +12 more sources
Cell-Free Massive MIMO versus Small Cells [PDF]
IEEE Transactions on Wireless Communications, 2017 A Cell-Free Massive MIMO (multiple-input multiple-output) system comprises a very large number of distributed access points (APs)which simultaneously serve a much smaller number of users over the same time/frequency resources based on directly measured ...
Ashikhmin, Alexei +4 more
core +11 more sources
Energy Efficiency of User-Centric, Cell-Free Massive MIMO-OFDM with Instantaneous CSI [PDF]
Entropy, 2022 In the user-centric, cell-free, massive multi-input, multi-output (MIMO) orthogonal frequency division multiplexing (OFDM) system, a large number of deployed access points (APs) serve user equipment (UEs) simultaneously, using the same time–frequency ...
Tongzhou Han, Danfeng Zhao
doaj +2 more sources
Efficient User-Serving Scheme in the User-Centric Cell-Free Massive MIMO System [PDF]
Sensors, 2022 A cell-free massive multiple input multiple output (MIMO) system is an attractive network model that is in the spotlight in 5G and future communication systems.
Ji-Hye Oh +5 more
doaj +2 more sources
The Downlink Performance for Cell-Free Massive MIMO with Instantaneous CSI in Slowly Time-Varying Channels [PDF]
Entropy, 2021 In centralized massive multiple-input multiple-output (MIMO) systems, the channel hardening phenomenon can occur, in which the channel behaves as almost fully deterministic as the number of antennas increases.
Tongzhou Han, Danfeng Zhao
doaj +2 more sources
Scalable Cell-Free Massive MIMO Systems [PDF]
IEEE Transactions on Communications, 2019 Imagine a coverage area with many wireless access points that cooperate to jointly serve the users, instead of creating autonomous cells. Such a cell-free network operation can potentially resolve many of the interference issues that appear in current ...
Emil Björnson, L. Sanguinetti
semanticscholar +4 more sources
On the Total Energy Efficiency of Cell-Free Massive MIMO [PDF]
IEEE Transactions on Green Communications and Networking, 2017 We consider the cell-free massive multiple-input multiple-output (MIMO) downlink, where a very large number of distributed multiple-antenna access points (APs) serve many single-antenna users in the same time-frequency resource.
Duong, Trung Q. +4 more
core +4 more sources
On Scalability of FDD-Based Cell-Free Massive MIMO Framework [PDF]
Sensors, 2023 Cell-free massive multiple-input multiple-output (MIMO) systems have the potential of providing joint services, including joint initial access, efficient clustering of access points (APs), and pilot allocation to user equipment (UEs) over large coverage ...
Beenish Hassan, Sobia Baig, Saad Aslam
doaj +2 more sources
Foundations of User-Centric Cell-Free Massive MIMO [PDF]
Foundations and Trends® in Signal Processing, 2020 Imagine a coverage area where each mobile device is communicating with a preferred set of wireless access points (among many) that are selected based on its needs and cooperate to jointly serve it, instead of creating autonomous cells.
Ozlem Tugfe Demir +2 more
semanticscholar +3 more sources
Next-Generation Multiple Access With Cell-Free Massive MIMO [PDF]
Proceedings of the IEEE, 2023 To meet the unprecedented mobile traffic demands of future wireless networks, a paradigm shift from conventional cellular networks to distributed communication systems is imperative.
M. Mohammadi +3 more
semanticscholar +5 more sources