Results 21 to 30 of about 13,256 (188)
Joint optimization for secure ambient backscatter communication in NOMA-enabled IoT networks
Digital 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
Journal 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
Impact of Mutual Coupling on Power-Domain Non-Orthogonal Multiple Access (NOMA) [PDF]
IEEE Access, 2020 This paper investigates the impact of mutual coupling (MC) on the achievable sum-rate of power-domain non-orthogonal multiple access (NOMA) system in both uplink (UL) and downlink (DL) transmissions. We assume a single-antenna user NOMA system with directional beamforming in the millimeter wave (mmW) channel.
Nann Win Moe Thet +3 more
openaire +4 more sources
OTFS-NOMA: An Efficient Approach for Exploiting Heterogenous User Mobility Profiles [PDF]
, 2019 This paper considers a challenging communication scenario, in which users have heterogenous mobility profiles, e.g., some users are moving at high speeds and some users are static.
Ding, Zhiguo +3 more
core +2 more sources
Massively Concurrent Non-Orthogonal Multiple Access for 5G Networks and Beyond
IEEE 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
RIS Partition-Assisted Non-Orthogonal Multiple Access (NOMA) and Quadrature-NOMA with Imperfect SIC
IEEE Transactions on Wireless Communications, 2022 Reconfigurable intelligent surface (RIS)-assisted power-domain non-orthogonal multiple access (PD-NOMA) system has emerged as a revolutionary technology to enhance the spectrum efficiency for future wireless networks. This work introduces two novel RIS systems, namely, RIS partition-assisted (RISP) PD-NOMA (RISP-PD-NOMA) and RISP-Quadrature NOMA (RISP ...
Ankita Chauhan +2 more
openaire +1 more source
Capacity Comparison between MIMO-NOMA and MIMO-OMA with Multiple Users in a Cluster [PDF]
, 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
Performance Analysis of Non-Orthogonal Multiple Access (NOMA) Enabled Cloud Radio Access Networks
IEEE Transactions on Wireless Communications, 2022 In this paper, the performance analysis of non-orthogonal multiple access (NOMA) in a cloud radio access networks (C-RAN) is carried out. The problem of jointly optimizing user association, muting and power-bandwidth allocation is formulated for NOMA-enabled C-RANs.
Rupesh Rai, Huiling Zhu, Jiangzhou Wang
openaire +1 more source
Partial Non-Orthogonal Multiple Access (NOMA) in Downlink Poisson Networks [PDF]
IEEE Transactions on Wireless Communications, 2020 Non-orthogonal multiple access (NOMA) allows users sharing a resource-block to efficiently reuse spectrum and improve cell sum rate $\mathcal{R}_{\rm tot}$ at the expense of increased interference. Orthogonal multiple access (OMA), on the other hand, guarantees higher coverage.
Konpal Shaukat Ali +2 more
openaire +2 more sources
IEEE 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