Results 11 to 20 of about 207,384 (248)
IET Networks, EarlyView., 2023 We utilise a metaheuristic optimisation method, inspired by nature, called the Lévy‐flight firefly algorithm (LFA), to tackle the power regulation and user grouping in the NOMA systems. Abstract The non‐orthogonal multiple access strategies have shown promise to boost fifth generation and sixth generation wireless networks' spectral efficiency and ...
Zaid Albataineh +4 more
wiley +1 more source
Zipf Distribution Power AllocationAapproach for NOMA Systems [PDF]
International Journal of Electronics and Telecommunications, 2023 Non-orthogonal multiple access (NOMA) has received tremendous attention for the development of 5G and beyond wireless networks. Power-domain NOMA works on the concept of assigning varying power levels to users within the same frequency and time block. In
Hanane Himeur +2 more
doaj +1 more source
Outage performance analysis of non-orthogonal multiple access with time-switching energy harvesting [PDF]
, 2019 In recent years, although non-orthogonal multiple access (NOMA) has shown its potentials thanks to its ability to enhance the performance of future wireless communication networks, a number of issues emerge related to the improvement of NOMA systems.
Huynh, Van Van +6 more
core +1 more source
Analysis of cooperative non-orthogonal multiple access networks with energy harvesting [PDF]
ITM Web of Conferences, 2022 In this paper, we investigate the performance of cooperative non-orthogonal access (NOMA) network with energy harvesting, where, source node and relay node serving as energy-constrained nodes harvest energy from the power beacon PBS.
Huang Haiyan +3 more
doaj +1 more source
NOMA-2000 Versus PD-NOMA: An Outage Probability Comparison [PDF]
IEEE Communications Letters, 2021 Non-orthogonal multiple access (NOMA) is an emerging technique promising to accommodate the increasing data rate requirements of next generation networks. In power-domain (PD) NOMA, this challenge is addressed by allocating two or more users on each orthogonal resource block while assigning significantly different power levels to all users.
Ismail Cosandal +3 more
openaire +3 more sources
Transmitted Data Security in Non-Orthogonal Multiple Access Networks with Directional Modulation Based on User Location [PDF]
International Journal of Information and Communication Technology Research, 2023 In Non-orthogonal multiple access, a user with a weaker channel gain is assigned more power than a user with a stronger channel. This type of power allocation allows the strong user (SU) to apply the successive interference cancellation (SIC) method that
Sepahdar Falsafi, HamidReza Khodadadi
doaj
A General MIMO Framework for NOMA Downlink and Uplink Transmission Based on Signal Alignment [PDF]
, 2015 The application of multiple-input multiple-output (MIMO) techniques to non-orthogonal multiple access (NOMA) systems is important to enhance the performance gains of NOMA. In this paper, a novel MIMO-NOMA framework for downlink and uplink transmission is
Ding, Zhiguo +2 more
core +2 more sources
Residual noma defect of upper lip reconstructed using Estlander flap
Medical Journal of Dr. D.Y. Patil University, 2015 Noma is a rapidly progressive, polymicrobial, opportunistic infection that occurs during periods of compromised immune function. It occurs in children with poor nutrition and compromised immune system.
Dinesh Singh Chauhan +1 more
doaj +1 more source
SRM Journal of Research in Dental Sciences, 2023 Rationale: Noma and necrotizing fasciitis are rapidly destructive gangrenous infections with different patterns of spread. This study aimed to present a case of concurrently occurring noma and necrotizing fascitis in a 3-year-old child.
Mujtaba Bala +4 more
doaj +1 more source
The impact of user mobility into non-orthogonal multiple access (NOMA) transmission systems [PDF]
EAI Endorsed Transactions on Industrial Networks and Intelligent Systems, 2020 Non-orthogonal multiple access techniques (NOMA) have been recognized as a paradigm shift for the design of multiple access techniques for the next generation of wireless networks.
Antonino Masaracchia +2 more
doaj +1 more source