Results 11 to 20 of about 91,357 (154)

Wireless-Powered Communications With Non-Orthogonal Multiple Access [PDF]

open access: yesIEEE Transactions on Wireless Communications, 2016
We study a wireless-powered uplink communication system with non-orthogonal multiple access (NOMA), consisting of one base station and multiple energy harvesting users. More specifically, we focus on the individual data rate optimization and fairness improvement and we show that the formulated problems can be optimally and efficiently solved by either ...
Panagiotis D. Diamantoulakis   +3 more
openaire   +4 more sources

Polar coded non-orthogonal multiple access [PDF]

open access: yes2016 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
openaire   +3 more sources

Investigating High Performance Implementations of Sparse Code Multiple Access (SCMA) Codebook Design

open access: yesJISR on Computing, 2022
- The number of mobile devices, IoT devices, and their applications is increasing day by day in recent years and further going to increase in coming years.
Halar Mustafa
doaj   +1 more source

Non-Orthogonal Multiple Access: A Unified Perspective [PDF]

open access: yesIEEE Wireless Communications, 2018
Non-orthogonal multiple access (NOMA) is a promising technique for future mobile communication systems, which can approach multiuser channel capacity by sharing the same time-frequency resources with multiple users. In this article, we provide a unified framework for NOMA and review the principles of various NOMA schemes in different domains with the ...
Wang, Qi   +3 more
openaire   +4 more sources

Non-orthogonal multiple access for FSO backhauling [PDF]

open access: yes2018 IEEE Wireless Communications and Networking Conference (WCNC), 2018
This paper has been submitted to IEEE WCNC ...
Najafi, Marzieh   +4 more
openaire   +2 more sources

Uplink non-orthogonal multiple access in heterogeneous networks: A review of recent advances and open research challenges

open access: yesInternational 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

NON-ORTHOGONAL MULTIPLE ACCESS SCHEMES SURVEY: AN OVERVIEW OF NON-ORTHOGONAL MULTIPLE ACCESS TECHNIQUES

open access: yesJournal of Engineering and Sustainable Development, 2023
Non-Orthogonal Multiple Access (NOMA) is a promising technology that can significantly improve the performance of wireless communication systems, especially in applications with a high number of users and limited spectral resources. NOMA enables simultaneous transmission and reception of multiple signals at the same time and frequency resources.
Sarab k. mahmood   +2 more
openaire   +1 more source

Cooperative Non-Orthogonal Multiple Access for Future Wireless Communications [PDF]

open access: yesEAI Endorsed Transactions on Industrial Networks and Intelligent Systems, 2018
There is a huge demand for increased connectivity and reliability of devices in the fifth generation and beyond of wireless communications so as to ensure massive connectivity and high spectral efficiency.
Sunyoung Lee
doaj   +1 more source

Uplink Non-Orthogonal Multiple Access With Golden Codeword Constellation

open access: yesIEEE Access, 2021
Non-orthogonal multiple access (NOMA) is a technique to improve spectral efficiency. In uplink NOMA (UL-NOMA) systems, mobile multiusers are globally synchronized to share the same time and frequency resources, and transmit their own independent symbols ...
Hongjun Xu, Narushan Pillay
doaj   +1 more source

Downlink Asynchronous Non-Orthogonal Multiple Access With Quantizer Optimization [PDF]

open access: yesIEEE Wireless Communications Letters, 2020
In this letter, we study a two-user downlink asynchronous non-orthogonal multiple access (ANOMA) with limited feedback. We employ the max-min criterion for the power allocation and derive the closed-form expressions for the upper and lower bounds of the max-min rate.
Xun Zou, Mehdi Ganji, Hamid Jafarkhani
openaire   +5 more sources

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