Resource Allocation for Downlink NOMA Systems: Key Techniques and Open Issues
TLDR
In this paper, the authors proposed a divide-and-next-largest-difference-based user pairing algorithm to distribute the capacity gain among the NOMA clusters in a controlled manner.Abstract:
This article presents advances in resource allocation for downlink non-orthogonal multiple access (NOMA) systems, focusing on user pairing and power allocation algorithms. The former pairs the users to obtain high capacity gain by exploiting the channel gain difference between the users, while the latter allocates power to users in each cluster to balance system throughput and user fairness. Additionally, the article introduces the concept of cluster fairness and proposes the divide-and-next-largest-difference-based user pairing algorithm to distribute the capacity gain among the NOMA clusters in a controlled manner. Furthermore, performance comparison between multiple-input multiple-output NOMA (MIMO-NOMA) and MIMO orthogonal multiple access (MIMO-OMA) is conducted when users have pre-defined quality of service. Simulation results are presented, which validate the advantages of NOMA over OMA. Finally, the article provides avenues for further research on resource allocation for downlink NOMA.read more
Citations
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Journal ArticleDOI
Resource Allocation in Downlink VLC-NOMA Systems for Factory Automation Scenario
Won Ryu,Jae-Woo Kim,Dongsu Kim +2 more
TL;DR: In this paper , the authors proposed a deep neural network (DNN)-based power allocation algorithm (DBPA) to improve the reliability of the VLC-NOMA system, and a priority-based user-pairing (PBUP) scheme was proposed.
Proceedings ArticleDOI
Average Rate Performance for Pairing Downlink NOMA Networks Schemes
TL;DR: In this article , the authors compared the average sum rate of a single-carrier NOMA (SC-NOMA) and time-division multiple access (TDMA) with different distances, using MATLAB simulation software program.
Proceedings ArticleDOI
Performance Analysis of OMA and NOMA Access Techniques
TL;DR: In this article , Orthogonal multiple access (OMA) and non-orthogonal MAA (NOMA), which are used for each generation, are reviewed and compared for the next generation of wireless mobile communication systems.
Proceedings ArticleDOI
Performance of Throughput based on Subcarrier Allocation in Non-Orthogonal Multiple Access
TL;DR: It can be concluded that subcarrier allocation is the parameter that affect the performance of throughput in NOMA.
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Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and Challenges
TL;DR: This paper comprehensively surveys the recent progress of NOMA in 5G systems, reviewing the state-of-the-art capacity analysis, power allocation strategies, user fairness, and user-pairing schemes in NomA.
Journal ArticleDOI
Impact of User Pairing on 5G Nonorthogonal Multiple-Access Downlink Transmissions
TL;DR: Both analytical and numerical results are provided to demonstrate that F-NOMA can offer a larger sum rate than orthogonal MA, and the performance gain of F- NOMA over conventional MA can be further enlarged by selecting users whose channel conditions are more distinctive.
Journal ArticleDOI
Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and Challenges
TL;DR: In this paper, the authors comprehensively survey the recent progress of NOMA in 5G systems, reviewing the state-of-the-art capacity analysis, power allocation strategies, user fairness, and user-pairing schemes in NOMAs.