Results 11 to 20 of about 498,835 (335)

Controlled Power Cooperative Non Orthogonal Multiple Access Relay Networks

Electrica
Recent work related to cooperative communication and power allocation has attracted much attention among researchers. This paper compares orthogonal multiple access (OMA), non orthogonal multiple access (NOMA), and cooperative NOMA.
Mario Ligwa, Vipin Balyan
doaj   +2 more sources

Non orthogonal multiple access with wind energy harvesting

Alexandria Engineering Journal, 2023
In this paper, we derive the performance of wireless communications using wind energy harvesting. We study the single-user and multi-user scenarios using Non Orthogonal and Orthogonal Multiple Access (NOMA and OMA).
Raed Alhamad, Hatem Boujemaa
doaj   +2 more sources

Non-Orthogonal Frequency Division Multiple Access [PDF]

2020 IEEE 91st Vehicular Technology Conference (VTC2020-Spring), 2020
This paper proposes a frequency-domain multiple user access scheme termed non-orthogonal frequency division multiple access (NoFDMA), which maintains the same data rate per user while allowing more users to access via non-orthogonal user overlapping in a given spectral band.
Tongyang Xu, Izzat Darwazeh
openaire   +2 more sources

Joint power control and user grouping for uplink power domain non-orthogonal multiple access

International Journal of Distributed Sensor Networks, 2021
Orthogonal multiple access schemes based on assignment of communication resource blocks among multiple contenders, although widely available, still necessitate an upper limit on the number of concurrent users for minimization of multiple-user ...
Bilal Ur Rehman, Mohammad Inayatullah Babar, Arbab Waheed Ahmad, Hesham Alhumyani, Gamil Abdel Azim, Rashid A. Saeed, Sayed Abdel Khalek   +6 more
doaj   +2 more sources

An Error Rate Comparison of Power Domain Non-Orthogonal Multiple Access and Sparse Code Multiple Access

IEEE Open Journal of the Communications Society, 2021
Non-orthogonal Multiple Access (NOMA) has been envisioned as one of the key enabling techniques to fulfill the requirements of future wireless networks. The primary benefit of NOMA is higher spectrum efficiency compared to Orthogonal Multiple Access (OMA)
Qu Luo, Pengyu Gao, Zilong Liu, Lixia Xiao, Zeina Mheich, Pei Xiao, Amine Maaref   +6 more
doaj   +2 more sources

Dynamic Non-Orthogonal Multiple Access and Orthogonal Multiple Access in 5G Wireless Networks

IEEE Transactions on Communications, 2019
In this paper, a novel framework for dynamic multiple access technology selection among orthogonal multiple access (OMA) and non-orthogonal multiple access (NOMA) techniques is proposed. For this setup, a joint resource allocation problem is formulated in which a new set of access technology selection parameters along with power and subcarrier are ...
Mina Baghani, Saeedeh Parsaeefard, Mahsa Derakhshani   +2 more
exaly   +2 more sources

Noise-Domain Non-Orthogonal Multiple Access

IEEE Open Journal of the Communications Society
In this paper, we present noise-domain non-orthogonal multiple access (ND-NOMA), an innovative communication scheme that utilizes the modulation of artificial noise mean and variance to convey information.
Erkin Yapici, Yusuf Islam Tek, Ertugrul Basar   +2 more
doaj   +4 more sources

Non-Orthogonal Multiple Access for Ubiquitous Wireless Sensor Networks [PDF]

Sensors, 2018
Ubiquitous wireless sensor networks (UWSNs) have become a critical technology for enabling smart cities and other ubiquitous monitoring applications. Their deployment, however, can be seriously hampered by the spectrum available to the sheer number of ...
Asim Anwar, Boon-Chong Seet, Zhiguo Ding
doaj   +2 more sources

Fluid Antenna System Enhancing Orthogonal and Non-Orthogonal Multiple Access

IEEE Communications Letters
Fluid antenna system (FAS) has recently emerged as a promising candidate for the sixth generation (6G) wireless networks. Unlike traditional antenna systems (TASs), FAS is a new wireless communication system where the so-called ‘fluid’ antenna (FA) can ...
W. New, kai-kit Wong, Hao Xu, Kin-Fai Tong, Chan-Byoung Chae, Yangyang Zhang   +5 more
semanticscholar   +3 more sources

Performance improvement of non-orthogonal multiple access scheme using code division multiplexing

International Journal of Distributed Sensor Networks, 2017
Currently, the standardization of fifth-generation mobile communication system (5G), which realizes 10 Gbps transmission, is in progress. In mobile communications, it is generally difficult to perform high-capacity transmission because of channel fading.
Hiroki Kitagawa, Eiji Okamoto
doaj   +2 more sources