Results 21 to 30 of about 515,342 (335)
Performance improvement of non-orthogonal multiple access scheme using code division multiplexing [PDF]
International Journal of Distributed Sensor Networks, 2017 Currently, the standardization of fifth-generation mobile communication system (5G), which realizes 10 Gbps transmission, is in progress. In mobile communications, it is generally difficult to perform high-capacity transmission because of channel fading.
Hiroki Kitagawa, Eiji Okamoto
doaj +2 more sources
Non-Orthogonal Multiple Access Enhanced Multi-User Semantic Communication [PDF]
IEEE Transactions on Cognitive Communications and Networking, 2023 Semantic communication has served as a novel paradigm and attracted a broad interest from researchers. One critical aspect of it is the multi-user semantic communication theory, which can further enhance its application for the practical network ...
Weizhi Li +5 more
semanticscholar +1 more source
Space-Time Shift Keying Aided OTFS Modulation for Orthogonal Multiple Access [PDF]
IEEE Transactions on Communications, 2023 Space-time shift keying-aided orthogonal time frequency space modulation-based multiple access (STSK-OTFS-MA) is proposed for reliable uplink transmission in high-Doppler scenarios.
Zeping Sui +4 more
semanticscholar +1 more source
Exploiting Semantic Communication for Non-Orthogonal Multiple Access [PDF]
IEEE Journal on Selected Areas in Communications, 2022 A novel semantics-empowered two-user uplink non-orthogonal multiple access (NOMA) framework is proposed for resource efficiency enhancement. More particularly, a secondary far user (F-user) employs the semantic communication (SemCom) while a primary near
Xidong Mu, Yuanwei Liu
semanticscholar +1 more source
Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and Challenges [PDF]
IEEE Communications Surveys and Tutorials, 2016 Non-orthogonal multiple access (NOMA) is one of the promising radio access techniques for performance enhancement in next-generation cellular communications.
S. Islam, N. Avazov, O. Dobre, K. Kwak
semanticscholar +1 more source
An orthogonal multiple access coding scheme [PDF]
Communications in Information and Systems, 2012 Consider a collection of unsynchronized, half-duplex wireless nodes, communicating over a shared spectrum with local affine clocks. The clocks areunsynchronized in the sense that they do not tick at the same rate, called skew, and have different offsets. The nodes also do not know each others rates or offsets.
Yih-Chun Hu +2 more
openaire +1 more source
Integrating Over-the-Air Federated Learning and Non-Orthogonal Multiple Access: What Role Can RIS Play? [PDF]
IEEE Transactions on Wireless Communications, 2021 With the aim of integrating over-the-air federated learning (AirFL) and non-orthogonal multiple access (NOMA) into an on-demand universal framework, this paper proposes a reconfigurable intelligent surface (RIS)-aided hybrid network by leveraging the RIS
Wanli Ni +4 more
semanticscholar +1 more source
International Journal of Distributed Sensor Networks, 2022 Fifth-generation wireless communications provide several benefits, including high throughput, lower latency, massive connectivity, considerable improvement in the number of users, higher base station capacity, and achieved quality of service.
Bilal Ur Rehman +6 more
doaj +1 more source
RIS Partition-Assisted Non-Orthogonal Multiple Access (NOMA) and Quadrature-NOMA With Imperfect SIC
IEEE Transactions on Wireless Communications, 2023 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.
Ankita Chauhan +2 more
semanticscholar +1 more source
Spectral Efficiency of OTFS Based Orthogonal Multiple Access With Rectangular Pulses [PDF]
IEEE Transactions on Vehicular Technology, 2021 In this paper, we consider Orthogonal Time Frequency Space (OTFS) modulation based multiple-access (MA). We specifically consider Orthogonal MA methods (OMA) where the user terminals (UTs) are allocated non-overlapping physical resource in the delay ...
Venkatesh Khammammetti, S. K. Mohammed
semanticscholar +1 more source