Results 41 to 50 of about 27,923 (259)

Delivering more to cell edge via joint multi‐cell non‐orthogonal multiple access and traffic offloading

open access: yesIET Networks, 2021
We consider leveraging the joint potential of non‐orthogonal multiple access (NOMA) and traffic offloading to benefit cell‐edge users in multi‐cell scenarios. We formulate the edge‐driven throughput maximisation problem where both the offloading decision
Yi Zhao, Di Yuan, Lei You
doaj   +1 more source

Joint optimization for secure ambient backscatter communication in NOMA-enabled IoT networks

open access: yesDigital Communications and Networks, 2023
Non-Orthogonal Multiple Access (NOMA) has emerged as a novel air interface technology for massive connectivity in Sixth-Generation (6G) era. The recent integration of NOMA in Backscatter Communication (BC) has triggered significant research interest due ...
Wali Ullah Khan   +4 more
doaj   +1 more source

Comparative Analysis of NOMA and OMA Schemes: GSVD-based NOMA Systems and the Role of Mobile Edge Computing

open access: yesJournal of Telecommunications and Information Technology, 2023
This paper presents a comprehensive study that examines the fundamental concept of the non-orthogonal multiple access (NOMA) scheme and provides its detailed comparison with the orthogonal multiple access (OMA) technique. Furthermore, the paper explores
Yunus Dursun
doaj   +1 more source

Capacity Comparison between MIMO-NOMA and MIMO-OMA with Multiple Users in a Cluster [PDF]

open access: yes, 2017
In this paper, the performance of multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) is investigated when multiple users are grouped into a cluster.
Dobre, Octavia A.   +4 more
core   +1 more source

Massively Concurrent Non-Orthogonal Multiple Access for 5G Networks and Beyond

open access: yesIEEE Access, 2019
We propose a new signal spreading-based non-orthogonal multiple access (NOMA) schemes that exploits the frame-theoretic design principles to enable the efficient concurrence of multiple users in both downlink (DL) and uplink (UL).
Razvan-Andrei Stoica   +3 more
doaj   +1 more source

Completion-Time-Driven Scheduling for Uplink NOMA-Enabled Wireless Networks [PDF]

open access: yes, 2020
Efficient scheduling policy is crucial in wireless networks due to delay-sensitivity of many emerging applications. In this work, we consider a joint user pairing and scheduling (UPaS) scheme for multi-carrier non-orthogonal multiple access (MC-NOMA ...
Derakhshani, Mahsa   +4 more
core   +1 more source

Survey and Performance Evaluation of Multiple Access Schemes for Next-Generation Wireless Communication Systems

open access: yesIEEE Access, 2021
Mobile communication systems are always in continuous evolution due to the demands of the end-users using this technology. Therefore, before the possible launch of 5G, some technologies have opened the way to the new mobile communication system. The need
A. F. M. Shahen Shah   +4 more
doaj   +1 more source

On Clustering and Channel Disparity in Non-Orthogonal Multiple Access (NOMA)

open access: yesCoRR, 2019
Non-orthogonal multiple access (NOMA) allows multiple users to share a time-frequency resource block by using different power levels. An important challenge associated with NOMA is the selection of users that share a resource block. This is referred to as clustering, which generally exploits the channel disparity (i.e. distinctness) among the users. We
Konpal Shaukat Ali   +3 more
openaire   +2 more sources

Dynamic User Grouping-Based NOMA Over Rayleigh Fading Channels

open access: yesIEEE Access, 2019
With the development of wireless communications and internet of things (IoT), non-orthogonal multiple access (NOMA) has been considered as one of effective schemes to meet the rapidly growing user access requirements.
Yue Yin   +4 more
doaj   +1 more source

Integration of Cognitive Radio Technology in NOMA-Based B5G Networks: State of the Art, Challenges, and Enabling Technologies

open access: yesIEEE Access, 2023
The integration of cognitive radio (CR) technology and non-orthogonal multiple access (NOMA) techniques, referred to as CR-based NOMA systems, has been recently configured as a promising solution to meet the requirements of beyond fifth-generation (B5G ...
Haythem Bany Salameh   +2 more
doaj   +1 more source

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