Journal ArticleDOI
Outage Performance of Cooperative Underlay CR-NOMA With Imperfect CSI
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TLDR
The proposed system model shows the superiority of the CR-NOMA compared with cooperative orthogonal multiple access and the derived analytical expressions are corroborated through Monte Carlo simulations.Abstract:
In this letter, a decode-and-forward cooperative underlay cognitive radio (CR) non-orthogonal multiple access (NOMA) network is studied. Exact closed-form expressions for the outage probability (OP) of two NOMA secondary destination users ( $U_{1}$ and $U_{2}$ ) are derived in the case of imperfect channel state information. Then, we find optimal power allocation factors for different distances of $U_{1}$ to satisfy the OP fairness for both users. Moreover, the proposed system model shows the superiority of the CR-NOMA compared with cooperative orthogonal multiple access. The derived analytical expressions are corroborated through Monte Carlo simulations.read more
Citations
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Journal ArticleDOI
Physical Layer Security of Cognitive Ambient Backscatter Communications for Green Internet-of-Things
TL;DR: This paper proposes a framework of C-AmBC networks in the presence of an unlicensed eavesdropper, and investigates the reliability and security of the proposed framework by invoking the outage probability (OP) and intercept probability (IP) with analytical derivations.
Journal ArticleDOI
NOMA in Cooperative Underlay Cognitive Radio Networks Under Imperfect SIC
TL;DR: The complex model of EH-assisted CR-NOMA is explored in outage behavior and throughput performance as awareness on imperfect successive interference cancellation (SIC) at the receiver and the exact closed-form of the exact outage probability is derived for each NOMA destination.
Journal ArticleDOI
Joint Impacts of Imperfect CSI and Imperfect SIC in Cognitive Radio-Assisted NOMA-V2X Communications
TL;DR: Simulation results are provided to verify the correctness of the derived expressions and it exhibits advantages of the proposed CR-assisted NOMA-V2X system in terms of outage probability and the throughput.
Journal ArticleDOI
Performance Analysis of Underlay Cognitive Radio Nonorthogonal Multiple Access Networks
TL;DR: The OP results of NOMA is compared with conventional orthogonal multiple access to show the supremacy of the former and Representative numerical and simulation results corroborate the effectiveness of the proposed scheme and presented analysis.
Posted Content
Cellular, Wide-Area, and Non-Terrestrial IoT: A Survey on 5G Advances and the Road Towards 6G.
Mojtaba Vaezi,Amin Azari,Saeed R. Khosravirad,Mahyar Shirvanimoghaddam,Mohammad Mahdi Azari,Danai Chasaki,Petar Popovski +6 more
TL;DR: In this paper, the authors provide a comprehensive survey on existing and emerging communication solutions for serving IoT applications in the context of cellular, wide-area, as well as non-terrestrial networks.
References
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Journal ArticleDOI
A Survey on Non-Orthogonal Multiple Access for 5G Networks: Research Challenges and Future Trends
Zhiguo Ding,Xianfu Lei,George K. Karagiannidis,Robert Schober,Jinhong Yuan,Vijay K. Bhargava +5 more
TL;DR: In this paper, the authors provide an overview of the latest NOMA research and innovations as well as their applications in 5G wireless networks and discuss future challenges and future research challenges.
Posted Content
A Survey on Non-Orthogonal Multiple Access for 5G Networks: Research Challenges and Future Trends
Zhiguo Ding,Xianfu Lei,George K. Karagiannidis,Robert Schober,Jinhong Yuan,Vijay K. Bhargava +5 more
TL;DR: In this paper, the authors provide an overview of the latest NOMA research and innovations as well as their applications in 5G wireless networks and discuss future research challenges regarding 5G and beyond.
Journal ArticleDOI
Cooperative Non-Orthogonal Multiple Access in 5G Systems
TL;DR: In this article, a cooperative NOMA scheme is proposed, where users with better channel conditions have prior information about the messages of other users, and an approach based on user pairing is also proposed to reduce system complexity.
Journal ArticleDOI
On the Performance of Non-orthogonal Multiple Access Systems With Partial Channel Information
TL;DR: The results demonstrate that NOMA can achieve superior performance compared to the traditional orthogonal multiple access (OMA) and the derived expressions for the outage probability and the average sum rate match well with the Monte Carlo simulations.
Book
Small Cell Networks: Deployment, PHY Techniques, and Resource Management
TL;DR: Key aspects covered include 3GPP standardisation, applications of stochastic geometry, PHY techniques, MIMO techniques, handover, and radio resource management, including techniques designed to make the best possible use of the available spectrum.