NOMA and 5G emerging technologies: A survey on issues and solution techniques

Akbar, Aamina; Jangsher, Sobia; Bhatti, Farrukh Aziz

doi:10.1016/j.comnet.2021.107950

Cited by 118 publications

(44 citation statements)

References 207 publications

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“…In contrast to OMA, nonorthogonal multiple access (NOMA) allowed multiple users to share the same frequency band at the same time, and thereby efficiently increasing the system’s spectral efficiency. NOMA is constituted of two main types, namely, PD-NOMA and code domain NOMA (CD-NOMA) [ 28 ]. CD-NOMA has the same main operating concept as CDMA, where multiple users can share the entire resources (frequency, time).…”

Section: Multiple Access Techniques In Rfmentioning

confidence: 99%

A Survey of NOMA for VLC Systems: Research Challenges and Future Trends

Sadat

Abaza

Mansour

et al. 2022

Sensors

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Visible light communication (VLC) has become a promising technology for high data rate communications and an attractive complementary to conventional radio frequency (RF) communication. VLC is a secure, energy efficient and cost-effective technology that exploits the existing infrastructure, particularly in indoor environments, for wireless data transmission. Nevertheless, the main limitation of developing high data rate VLC links is the narrow modulation bandwidth of light-emitting diodes (LEDs), which is in the megahertz range. The power domain nonorthogonal multiple access (PD-NOMA) scheme is envisioned to address several challenges in VLC systems. In this paper, we present a detailed overview of PD-NOMA based VLC systems. Moreover, we introduce insights on some PD-NOMA VLC system constraints and challenges such as power allocation, clipping effect, MIMO and security. Finally, we provide open research problems as well as possible directions for future research to pave the way for the implementation of PD-NOMA VLC systems.

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Section: Multiple Access Techniques In Rfmentioning

confidence: 99%

A Survey of NOMA for VLC Systems: Research Challenges and Future Trends

Sadat

Abaza

Mansour

et al. 2022

Sensors

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“…For this scheme, each user uses the same time and frequency where they are selected considering the power levels. In NOMA, the successive interference cancellation (SIC) is used to reserve the users both in the downlink and uplink [1][2][3][4][5][6][7].…”

Section: Mimo-noma System Modelmentioning

confidence: 99%

“…One of the most important ways to deal with these destructive effects is to use a multi-antenna transceiver. By using NOMA combined with multiple antenna structures, not only high-rate data transmission is provided but also the destructive effects caused by fading are minimized [2][3][4][5][6][7]. However, symbol detection is a crucial process to detect symbols coherently in wireless communication systems [8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Symbol Detection Based on Back Tracking Search Algorithm in MIMO-NOMA Systems

Seyman¹

2022

Computer Systems Science and Engineering

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One of the most important methods used to cope with multipath fading effects, which cause the symbol to be received incorrectly in wireless communication systems, is the use of multiple transceiver antenna structures. By combining the multi-input multi-output (MIMO) antenna structure with non-orthogonal multiple access (NOMA), which is a new multiplexing method, the fading effects of the channels are not only reduced but also high data rate transmission is ensured. However, when the maximum likelihood (ML) algorithm that has high performance on coherent detection, is used as a symbol detector in MIMO NOMA systems, the computational complexity of the system increases due to higher-order constellations and antenna sizes. As a result, the implementation of this algorithm will be impractical. In this study, the backtracking search algorithm (BSA) is proposed to reduce the computational complexity of the symbol detection and have a good bit error performance for MIMO-NOMA systems. To emphasize the efficiency of the proposed algorithm, simulations have been made for the system with various antenna sizes. As can be seen from the obtained results, a considerable reduction in complexity has occurred using BSA compared to the ML algorithm, also the bit error performance of the system is increased compared to other algorithms.

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“…The cooperative NOMA system's user fairness and performance while implementing the irregular convolutional code are examined using extrinsic information transfer (EXIT) charts (IRCC). The suggested system's convergence analysis is evaluated utilizing the EXIT chart and IRCC [44,45].…”

Section: Generation Towards 5gmentioning

confidence: 99%

NOMA and OMA‐Based Massive MIMO and Clustering Algorithms for Beyond 5G IoT Networks

Rahman

Khan

Khan³

et al. 2021

Wireless Communications and Mobile Computing

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The Internet of Things (IoT) has brought about various global changes, as all devices will be connected. This article examines the latest 5G solutions for enabling a massive cellular network. It further explored the gaps in previously published articles, demonstrating that to deal with the new challenges. The mobile network must use massive multiple input and output (MIMO), nonorthogonal multiple access (NOMA), orthogonal multiple access (OMA), signal interference cancellation (SIC), channel state information (CSI), and clustering. Furthermore, this article has two objectives such as (1) to introduce the cluster base NOMA to reduce the computational complexity by applying SIC on a cluster, which ultimately results in faster communication and (2) to achieve massive connectivity by proposing massive MIMO with NOMA and OMA. The proposed NOMA clustering technique working principle pairs the close user with the far user; thus, it will reduce computational complexity, which was one such big dilemma in the existing articles. This will specifically help those users that are far away from the base station by maintaining the connectivity. Despite NOMA’s extraordinary benefits, one cannot deny the significance of the OMA; hence, the other objective of the proposed work is to introduce OMA with MIMO in small areas where the user is low in number, it is already in use, and quite cheap. The next important aspect of the proposed work is SIC, which helps remove interference and leads to enhancement in network performance. The simulation result has clearly stated that NOMA has gained a higher rate than OMA: current NOMA users’ power requirement (weak signal user 0.06, strong signal user 0.07), spectral efficiency ratio for P-NOMA and C-NOMA (21%, 5%), signal-to-noise ratio OMA, P-NOMA, C-NOMA (28, 40, 55%), and user rate pairs NOMA, OMA (7, 3), C-NOMA, and massive MIMO NOMA SINR (4.0, 2.5).

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NOMA and 5G emerging technologies: A survey on issues and solution techniques

Cited by 118 publications

References 207 publications

A Survey of NOMA for VLC Systems: Research Challenges and Future Trends

A Survey of NOMA for VLC Systems: Research Challenges and Future Trends

Symbol Detection Based on Back Tracking Search Algorithm in MIMO-NOMA Systems

NOMA and OMA‐Based Massive MIMO and Clustering Algorithms for Beyond 5G IoT Networks

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