Results 81 to 90 of about 2,701 (178)

A NOMA-Enhanced Reconfigurable Access Scheme With Device Pairing for M2M Networks

IEEE Access, 2019
This paper aims to address the distinct requirements of machine-to-machine networks, particularly heterogeneity and massive transmissions. To this end, a reconfigurable medium access control with the ability to choose a proper access scheme with the ...
Atoosa Dalili Shoaei, Mahsa Derakhshani, Tho Le-Ngoc   +2 more
doaj   +1 more source

Comprehensive Study and Comparison on 5G NOMA Schemes

IEEE Access, 2018
Compared to the traditional orthogonal multiple access, non-orthogonal multiple access (NOMA) technology can achieve higher spectrum efficiency and support more massive connectivity. In this paper, we conduct comprehensive study and comparison on current
Zhanji Wu, Kun Lu, Chengxin Jiang, Xuanbo Shao   +3 more
doaj   +1 more source

Modeling and Performance Evaluation of a Cellular Network with OMA and NOMA Users with Batch Arrivals by Means of an M^[X]/M/S/0 Model

Mathematics
Nowadays, efficient spectrum usage is one of the most important design principles to take into account in wireless communications due to the exponential growth of mobile devices.
Luis Alberto Vásquez-Toledo, Carlos González-Flores, Miguel Lopez-Guerrero, Alfonso Prieto-Guerrero, José Alfredo Tirado-Méndez, Ricardo Marcelín-Jiménez, Enrique Rodriguez-Colina, Michael Pascoe-Chalke, Francisco R. Castillo-Soria   +8 more
doaj   +1 more source

Performance analysis of partial NOMA-based layered D2D communications

EURASIP Journal on Wireless Communications and Networking
Conventionally, non-orthogonal multiple access (NOMA) has traditionally been implemented separately from orthogonal multiple access (OMA), aiming to improve the capacity of multi-user systems. However, a recent study has ventured beyond this conventional
Jinjuan Ju, Qiang Sun
doaj   +1 more source

Relay-Aided Uplink NOMA Under Non-Orthogonal CCI and Imperfect SIC in 6G Networks

IEEE Open Journal of Vehicular Technology
Sixth generation (6G) networks must guarantee radio-resource availability for coexisting users and machines. Here, non-orthogonal multiple access (NOMA) can address resource limitations by serving multiple devices on the same spectral and temporal ...
Volkan Ozduran, Nikolaos Nomikos, Ehsan Soleimani-Nasab, Imran Shafique Ansari, Panagiotis Trakadas   +4 more
doaj   +1 more source

Hybrid Multiple Access Techniques Performance Analysis Of Dynamic Resource Allocation

Iraqi Journal of Information & Communication Technology
The Non-Orthogonal Multiple Access (NOMA) and the Orthogonal Frequency Division Multiple Access (OFDMA) are promising techniques for next-generation wireless systems. Although much attention in the literature considered these techniques, an effective
Raya K. Mohammed, Nasser N. Khamiss
doaj   +1 more source

Partially Overlapping NOMA System with Many Neighboring Channels

Journal of Communications Software and Systems
The increasing usage of the Internet of Things (IoT) and other modern massive machine-type communication applications has led to a growing demand for more efficient u tilization o f a vailable c ommunication bandwidth.
Zoltán Belso, László Pap
doaj   +1 more source

Non-orthogonal multiple access (NOMA) for cellular wireless communications

, 2017
This thesis begins with an overview of the basic concept of NOMA by identifying the key working principle of NOMA systems and their respective power allocation requirements in both of downlink and uplink transmissions. Then, for cell-throughput maximization in both of downlink and uplink NOMA transmissions, the joint problem of user clustering and ...
openaire   +2 more sources

Blind Device Detection via Extended Sparsity Estimation-OMP in Grant-Free NOMA-IoT. [PDF]

Sensors (Basel)
Andini N, Suksmono AB, Suryana J, Usman K.   +3 more
europepmc   +1 more source

Outage performance of UAV-NOMA networks over rician faded channel with hardware impairments, channel estimation error, and SIC imperfection. [PDF]

PLoS One
Thaherbasha S, Parveen SDN, Medasani S, Turpati S, Addepalli T, Sharma M, Pathan S.   +6 more
europepmc   +1 more source