Results 101 to 110 of about 206,497 (302)
Adaptive User Pairing for Downlink NOMA System with Imperfect SIC [PDF]
arXiv, 2020 Non-orthogonal multiple access (NOMA) has been recognized as a key driving technology for the fifth generation (5G) and beyond 5G cellular networks. For a practical dowlink NOMA system with imperfect successive interference cancellation (SIC), we derive bounds on channel coefficients and power allocation factors between NOMA users to achieve higher ...
arxiv
On the Performance of NOMA With Hybrid ARQ [PDF]
IEEE Transactions on Vehicular Technology, 2018 In this paper, we investigate the outage performance of hybrid automatic repeat request with chase combining (HARQ-CC) assisted downlink non-orthogonal multiple access (NOMA) systems. A closed-form expression of the individual outage probability and the diversity gain are obtained firstly.
Donghong Cai +3 more
openaire +4 more sources
Periodontal diseases in Africa
Periodontology 2000, EarlyView.Abstract Periodontal diseases, a group of complex conditions marked by an excessive immune response and periodontal tissue destruction, are a global health concern. Since 1990, the incidence of these diseases has doubled, with Western sub‐Saharan Africa experiencing the highest burden.
Mojisola Olujitan +5 more
wiley +1 more source
NOMA: Principles and Recent Results [PDF]
arXiv, 2017 Although non-orthogonal multiple access (NOMA) is recently considered for cellular systems, its key ideas such as successive interference cancellation (SIC) and superposition coding have been well studied in information theory. In this paper, we overview principles of NOMA based on information theory and present some recent results. Under a single-cell
arxiv
Harvesting Devices' Heterogeneous Energy Profiles and QoS Requirements in IoT: WPT-NOMA vs BAC-NOMA [PDF]
arXiv, 2020 The next generation Internet of Things (IoT) exhibits a unique feature that IoT devices have different energy profiles and quality of service (QoS) requirements. In this paper, two energy and spectrally efficient transmission strategies, namely wireless power transfer assisted non-orthogonal multiple access (WPT-NOMA) and backscatter communication ...
arxiv
Non-Orthogonal Multiple Access For Near-Field Communications [PDF]
arXiv, 2023 The novel concept of near-field non-orthogonal multiple access (NF-NOMA) communications is proposed. The near-filed beamfocusing enables NOMA to be carried out in both angular and distance domains. Two novel frameworks are proposed, namely, single-location-beamfocusing NF-NOMA (SLB-NF-NOMA) and multiple-location-beamfocusing NF-NOMA (MLB-NF-NOMA).
arxiv
Trellis-Coded Non-Orthogonal Multiple Access [PDF]
, 2019 In this letter, we propose a trellis-coded non-orthogonal multiple access (NOMA) scheme. The signals for different users are produced by trellis coded modulation (TCM) and then superimposed on different power levels.
Ganji, M, Jafarkhani, H, Zou, X
core +1 more source
The Dual‐Edged State Paradox: Fighting for Justice When the State is Unreliable
Sociological Inquiry, EarlyView.Sociological theories of collective resistance offer insights into how communities mobilize against oppression but often overlook the complexities when the state, an entity relied upon for justice, also acts as an agent of betrayal. Based on 8 years of ethnographic research in Palermo (2016–2024), this study examines the relationship between Sicilian ...
Baris Cayli Messina
wiley +1 more source
Cognitive Non-Orthogonal Multiple Access with Cooperative Relaying: A New Wireless Frontier for 5G Spectrum Sharing [PDF]
arXiv, 2018 Two emerging technologies towards 5G wireless networks, namely non-orthogonal multiple access (NOMA) and cognitive radio (CR), will provide more efficient utilization of wireless spectrum in the future. In this article, we investigate the integration of NOMA with CR into a holistic system, namely cognitive NOMA network, for more intelligent spectrum ...
arxiv
Bi-Directional Cooperative NOMA without Full CSIT [PDF]
, 2018 In this paper, we propose bi-directional cooperative non-orthogonal multiple access (NOMA). Compared to conventional NOMA, the main contributions of bi-directional cooperative NOMA can be explained in two directions: 1) The proposed NOMA system is still efficient when the channel gains of scheduled users are almost the same. 2) The proposed NOMA system
arxiv +1 more source