Results 41 to 50 of about 515,342 (335)
Dynamic User Clustering and Power Allocation for Uplink and Downlink Non-Orthogonal Multiple Access (NOMA) Systems [PDF]
IEEE Access, 2016 Non-orthogonal multiple access (NOMA) has recently been considered as a key enabling technique for 5G cellular systems. In NOMA, by exploiting the channel gain differences, multiple users are multiplexed into transmission power domain and then non ...
Md Shipon Ali, H. Tabassum, E. Hossain
semanticscholar +1 more source
IEEE Transactions on Wireless Communications, 2022 Due to the emergence of non-terrestrial platforms with extensive coverage, flexible deployment, and reconfigurable characteristics, the hybrid satellite-aerial-terrestrial networks (HSATNs) can accommodate a great variety of wireless access services in ...
Xiaokai Zhang +5 more
semanticscholar +1 more source
A novel uplink multiple access scheme based on TDS-FDMA [PDF]
, 2011 This contribution proposes a novel time-domain synchronous frequency division multiple access (TDS-FDMA) scheme to support multi-user uplink application.
Dai, Linglong +5 more
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Reconfigurable Intelligent Surface-Assisted Non-Orthogonal Multiple Access
IEEE Transactions on Wireless Communications, 2021 Reconfigurable intelligent surface (RIS) is a revolutionary technology to achieve spectrum-, energy-, and cost-efficient wireless networks. This paper considers an RIS-assisted downlink non-orthogonal-multiple-access (NOMA) system.
Gang Yang +3 more
semanticscholar +1 more source
Non-Orthogonal Multiple Access and Network Slicing: Scalable Coexistence of eMBB and URLLC [PDF]
IEEE Vehicular Technology Conference, 2021 The 5G systems feature three generic services: enhanced Mobile BroadBand (eMBB), massive Machine-Type Communications (mMTC) and Ultra-Reliable and Low-Latency Communications (URLLC).
E. N. Tominaga +4 more
semanticscholar +1 more source
RIS Enhanced Massive Non-Orthogonal Multiple Access Networks: Deployment and Passive Beamforming Design [PDF]
IEEE Journal on Selected Areas in Communications, 2020 A novel framework is proposed for the deployment and passive beamforming design of a reconfigurable intelligent surface (RIS) with the aid of non-orthogonal multiple access (NOMA) technology.
Xinyu Liu +3 more
semanticscholar +1 more source
Optimum Fairness for Non-Orthogonal Multiple Access [PDF]
2018 IEEE/CIC International Conference on Communications in China (ICCC), 2018 This paper focuses on the fairness issue in non-orthogonal multiple access (NOMA) and investigates the optimization problem that maximizes the worst user's achievable rate. Unlike previous studies, we derive a closed-form expression for the optimal value and solution, which are related to Perron-Frobenius eigenvalue and eigenvector of a defined ...
Ting Qi +3 more
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Polar coded non-orthogonal multiple access [PDF]
2016 IEEE International Symposium on Information Theory (ISIT), 2016 In this paper, polar codes are first applied in non-orthogonal multiple access (NOMA) and the channel polarization idea is extended to NOMA, which is a major multiple access technique in 5G systems. The polar coded NOMA (PC-NOMA) scheme is proposed, whereby the NOMA channel is decomposed into a series of binary-input channels under a two-stage channel ...
Jincheng Dai +3 more
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Frequency-domain precoding for single carrier frequency-division multiple access [PDF]
, 2009 At present there is considerable interest in the use of single carrier frequency-division multiple access. This interest is justified by the inherent single carrier structure of the SC-FDMA scheme, which is more robust against phase noise and has a lower
Nix, AR, Noune, MB
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An Improved Network-Coded Multiple Access for Power-Balanced Non-Orthogonal Multiple Access
IEEE Access, 2018 A recently proposed network-coded multiple access (NCMA), consisting of XOR-based channel decoding and multi-user complete decoding (MUD-CD), can significantly improve throughput over conventional successive interference cancellation (SIC) decoding under
Pingping Chen +4 more
doaj +1 more source