Results 31 to 40 of about 6,700 (214)
Waveform-domain NOMA: The future of multiple access [PDF]
, 2020 This paper introduces a novel non-orthogonal multiple access (NOMA) concept named waveform-domain NOMA, which proposes the coexistence of different waveforms in the same resource element (RE).
Şahin, Mehmet Mert +3 more
core +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
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
Sensors, 2019 In this paper, an Internet-of-Things (IoT) system containing a relay selection is studied as employing an emerging multiple access scheme, namely non-orthogonal multiple access (NOMA).
Dinh-Thuan Do +3 more
doaj +1 more source
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
On Clustering and Channel Disparity in Non-Orthogonal Multiple Access (NOMA)
CoRR, 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
Cooperative non-orthogonal multiple access with physical layer network coding [PDF]
, 2019 Physical layer network coding (PNC) has been proposed for information exchange between a pair of users assisted by a relay. However, the spectral efficiency of PNC reduces when the number of user pairs increases due to the requirement of orthogonal ...
Chee, Yen Leow, Chun, Yeen Ho
core +1 more source
Dynamic User Grouping-Based NOMA Over Rayleigh Fading Channels
IEEE 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
IEEE 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
Non-Orthogonal Multiple Access for Next-Generation Satellite Systems: Flexibility Exploitation and Resource Optimization [PDF]
, 2022 In conventional satellite communication systems, onboard resource management follows pre-design approaches with limited flexibility. On the one hand, this can simplify the satellite payload design.
WANG, Anyue
core