@article{002fa9c76a4e4437bc843da8f44250af,
title = "Resource Allocation for Downlink NOMA Systems: Key Techniques and Open Issues",
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.",
keywords = "NOMA, Downlink, Resource management, Silicon carbide, Performance gain, Clustering algorithms, Interference, 5G mobile communication, Multiaccess communication",
author = "Islam, {S. M.Riazul} and Ming Zeng and Dobre, {Octavia A.} and Kwak, {Kyung Sup}",
note = "Funding Information: Chair at Memorial University, Canada. In 2013 she was a visiting professor at Massachusetts Institute of Technology and the University of Brest, France. Previously, she was with New Jersey Institute of Technology and Polytechnic Institute of Technology, Romania. She was the recipient of a Royal Society scholarship and a Fulbright fellowship. Her research interests include enabling technologies for 5G, cognitive radio systems, blind signal identification, and parameter estimation techniques, as well as optical and underwater communications. She is the Editor-in-Chief of IEEE Communications Letters. She has served as an Editor for various prestigious journals, as well as Technical Co-Chair of different international conferences, such as IEEE ICC and GLOBECOM. She is a Member-at-Large of the Administrative Committee of the IEEE Instrumentation and Measurement Society, and has served as Chair and Co-Chair of different technical committees. She is a Fellow of the Engineering Institute of Canada. Funding Information: This work was supported by the National Research Foundation of Korea (NRF- 2017R1A2B2012337), in part by Sejong University Faculty Research Fund (No. 20170139), as well as the Natural Sciences and Engi neering Research Council of Canada (NSERC), through its Discovery program. Publisher Copyright: {\textcopyright} 2002-2012 IEEE.",
year = "2018",
month = apr,
day = "30",
doi = "10.1109/MWC.2018.1700099",
language = "English",
volume = "25",
pages = "40--47",
journal = "IEEE Wireless Communications",
issn = "1536-1284",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "2",
}
