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Modulation and Multiple Access for 5G Networks

Research output: Contribution to journalJournal article

Published
  • Yunlong Cai
  • Zhijin Qin
  • Fangyu Cui
  • Geoffrey Li
  • Julie McCann
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<mark>Journal publication date</mark>02/2018
<mark>Journal</mark>Communications Surveys and Tutorials, IEEE Communications Society
Issue number1
Volume20
Number of pages18
Pages (from-to)629-646
StatePublished
Early online date26/10/17
Original languageEnglish

Abstract

Fifth generation (5G) wireless networks face various challenges in order to support large-scale heterogeneous traffic and users, therefore new modulation and multiple access (MA) schemes are being developed to meet the changing demands. As this research space is ever increasing, it becomes more important to analyze the various approaches, therefore, in this article we present a comprehensive overview of the most promising modulation and MA schemes for 5G networks. Unlike other surreys of 5G networks, our article focuses on multiplexing techniques, including modulation techniques in orthogonal multiple access (OMA) and various types of non-orthogonal multiple access (NOMA) techniques. Specifically, we first introduce different types of modulation schemes, potential for OMA, and compare their performance in terms of spectral efficiency, out-of-band leakage, and bit-error rate. We then pay close attention to various types of NOMA candidates, including power-domain NOMA, code-domain NOMA, and NOMA multiplexing in multiple domains. From this exploration, we can identify the opportunities and challenges that will have the most significant impacts on modulation and MA designs for 5G networks.