Results 21 to 30 of about 8,369,214 (277)

Two-Stage Superposed Transmission for Cooperative NOMA Systems

open access: yesIEEE Access, 2018
In this paper, a two-stage superposed transmission scheme for cooperative nonorthogonal multiple access (NOMA) systems is proposed. During the first N time slots, the source simultaneously transmits the superposition coded symbols to the relay and ...
Wei Duan   +4 more
doaj   +1 more source

Outage Performance of the Full-Duplex Two-Way DF Relay System Under Imperfect CSI

open access: yesIEEE Access, 2017
Contrary to the most existing works about the full-duplex (FD) relaying with perfect channel state information (CSI), this paper studies the outage performance of the two-way FD decode-and-forward relay network under the joint effects of the residual ...
Cheng Li   +5 more
doaj   +1 more source

Exploiting Full-duplex and Fixed Power Allocation Approaches for Dual-hop Transmission in Downlink NOMA

open access: yesAdvances in Electrical and Electronic Engineering, 2021
In a wireless system, dual-hop transmission requires Full-Duplex (FD) to transmit signals from the base station too far users. It is more beneficial if we deploy non-orthogonal multiple access to serve specific users, i.e.
Tu-Trinh Thi Nguyen, Dinh-Thuan Do
doaj   +1 more source

On the Performance of Full-Duplex Cooperative NOMA With Non-Linear EH

open access: yesIEEE Access, 2021
This paper studies a non-linear energy harvesting (EH) enabled full-duplex (FD) cooperative non-orthogonal multiple access (C-NOMA) system, where the near user acts as an FD relay to assist the transmission from BS to far user with power-splitting (PS ...
Long Ma, Enyu Li, Qianqian Yang
doaj   +1 more source

Outage performance of SWIPT-NOMA-CR network with imperfect SIC and CSI

open access: yes物联网学报, 2023
For the cognitive relay network based on simultaneous wireless information and power transfer (SWIPT) and non-orthogonal multiple access (NOMA), which is termed as SWIPT-NOMA-CR network, considering the practical situation of imperfect successive ...
Zhuhua MA, Liping LUO
doaj   +2 more sources

Research on Outage Performance Optimization of Cognitive Relay Network with Cooperative Sensing

open access: yesJournal of Computing and Information Technology, 2016
In this work, cooperative spectrum sensing technology is applied to optimize the outage probability of cognitive relay networks. The outage performance optimization problem of cognitive relay networks is resolved by designing the sensing time and fusion ...
Yaolian Song   +3 more
doaj   +1 more source

On Converged Secrecy Outage Performance for RIS-Aided Communications

open access: yes2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall), 2023
Secrecy performance is one of the most crucial and interesting aspects of physical layer security (PLS) that has been analyzed in the past decades. Reconfigurable intelligent surface (RIS) is a cost-effective component to enhance the secrecy performance of wireless communication systems.
Junming Li   +3 more
openaire   +4 more sources

On Exact Outage and Throughput Performance of Cognitive Radio based Non-Orthogonal Multiple Access Networks With and Without D2D Link

open access: yesSensors, 2019
In this paper, we investigate the performance of a secondary network in a cognitive radio network employing a non-orthogonal multiple access (NOMA) scheme to form a CR-NOMA system serving many destination users.
Dinh-Thuan Do   +3 more
doaj   +1 more source

Performance analysis of energy-harvesting-aware multi-relay networks in Nakagami-m fading

open access: yesEURASIP Journal on Wireless Communications and Networking, 2018
This paper investigates the outage performance of an energy-harvesting(EH) relay-aided cooperative network, where the source node transmits information to its destination node with the help of multiple energy-harvesting cooperative nodes.
Shaohong Zhong, Huajun Huang, Renfa Li
doaj   +1 more source

NOMA-Based User Cooperation With Incremental Hybrid Forwarding Protocols

open access: yesIEEE Open Journal of the Communications Society, 2021
In this paper, we investigate the performance of a non-orthogonal multiple access (NOMA) wireless system, in which signal transmission of a far user is assisted by a near user.
Suyue Li   +5 more
doaj   +1 more source

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