Results 21 to 30 of about 26,532 (257)

Efficient User Clustering, Receive Antenna Selection, and Power Allocation Algorithms for Massive MIMO-NOMA Systems

open access: yesIEEE Access, 2019
Massive multiple-input multiple-output (MIMO) and nonorthogonal multiple access (NOMA)-based technologies are considered as essential parts in the 5G systems to fulfill the escalating demands of higher connectivity and data rates for emerging wireless ...
Walid A. Al-Hussaibi, Falah H. Ali
doaj   +1 more source

Performance Analysis of MIMO-NOMA Iterative Receivers for Massive Connectivity

open access: yesIEEE Access, 2022
The Fifth Generation (5G) of wireless networks introduced support to Machine-Type Communications (MTC), which is the wireless connectivity solution for Internet of Things (IoT) applications.
Eduardo N. Tominaga   +4 more
doaj   +1 more source

Broadband Connectivity for Handheld Devices via LEO Satellites: Is Distributed Massive MIMO the Answer?

open access: yesIEEE Open Journal of the Communications Society, 2023
Significant efforts are being made to integrate satellite and terrestrial networks into a unified wireless network. One major aspect of such an integration is the use of unified user terminals (UTs), which work for both networks and can switch seamlessly
Mohammed Y. Abdelsadek   +5 more
doaj   +1 more source

Limited Feedback Designs for Machine-Type Communications Exploiting User Cooperation

open access: yesIEEE Access, 2019
Multiuser multiple-input-multiple-output (MIMO) systems are a prime candidate for use in massive connection density in machine-type communication (MTC) networks.
Jiho Song   +3 more
doaj   +1 more source

Performance Analysis of Grant-Free Multiple Access for Supporting Sporadic Traffic in Massive IoT Networks

open access: yesIEEE Access, 2019
Grant-free multiple access (GFMA) protocol has been regarded as a key element to support sporadic traffic generated from massive internet-of-things (IoT) networks. In GFMA protocol, each IoT device transmits data packets without grant from a base station
Taehoon Kim, Bang Chul Jung
doaj   +1 more source

Asynchronous Flipped Grant-Free SCMA for Satellite-Based Internet of Things Communication Networks

open access: yesApplied Sciences, 2019
Sparse code multiple access (SCMA) is a promising code domain non-orthogonal multiple-access scheme which is able to support massive connectivity and grant-free transmission in future satellite-based Internet of Things (IoT) communication networks ...
Pengxu Li, Gaofeng Cui, Weidong Wang
doaj   +1 more source

Improved Deterministic Connectivity in Massively Parallel Computation

open access: yesCoRR, 2022
Leibniz International Proceedings in Informatics (LIPIcs ...
Manuela Fischer   +2 more
openaire   +6 more sources

Near-Optimal Massively Parallel Graph Connectivity [PDF]

open access: yes2019 IEEE 60th Annual Symposium on Foundations of Computer Science (FOCS), 2019
Identifying the connected components of a graph, apart from being a fundamental problem with countless applications, is a key primitive for many other algorithms. In this paper, we consider this problem in parallel settings. Particularly, we focus on the Massively Parallel Computations (MPC) model, which is the standard theoretical model for modern ...
Soheil Behnezhad   +4 more
openaire   +4 more sources

A Left-Null-Space-Based Massive Access Method for Cell-Free Massive MIMO IoT Systems

open access: yesSensors, 2023
Cell-free massive multiple-input multiple-output (MIMO) is a promising technology for the Internet of Things (IoT) because it can increase connectivity and provide considerable energy efficiency (EE) and spectral efficiency (SE).
Yang Wang, Die Hu
doaj   +1 more source

Connection between certain massive and massless diagrams [PDF]

open access: yesPhysical Review D, 1996
A useful connection between two-loop massive vacuum integrals and one-loop off-shell triangle diagrams with massless internal particles is established for arbitrary values of the space-time dimension {ital n}. {copyright} {ital 1996 The American Physical Society.}
, Davydychev, , Tausk
openaire   +2 more sources

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