UM
Achievable Diversity Order of HARQ-Aided Downlink NOMA Systems
Shi,Zheng1; Zhang,Chenmeng3; Fu,Yaru4; Wang,Hong2; Yang,Guanghua1; Ma,Shaodan5
2020
Source PublicationIEEE Transactions on Vehicular Technology
ISSN0018-9545
Volume69Issue:1Pages:471-487
AbstractThe combination between non-orthogonal multiple access (NOMA) and hybrid automatic repeat request (HARQ) is capable of realizing ultra-reliability, high throughput and many concurrent connections particularly for emerging communication systems. This paper focuses on characterizing the asymptotic scaling law of the outage probability of HARQ-aided NOMA systems with respect to the transmit power, i.e., diversity order. The analysis of diversity order is carried out for three basic types of HARQ-aided downlink NOMA systems, including Type I HARQ, HARQ with chase combining (HARQ-CC) and HARQ with incremental redundancy (HARQ-IR). The diversity orders of three HARQ-aided downlink NOMA systems are derived in closed-form, where an integration domain partition trick is developed to obtain the bounds of the outage probability specially for HARQ-CC and HARQ-IR-aided NOMA systems. The analytical results show that the diversity order is a decreasing step function of transmission rate, and full time diversity can only be achieved under a sufficiently low transmission rate. It is also revealed that HARQ-IR-aided NOMA systems have the largest diversity order, followed by HARQ-CC-aided and then Type I HARQ-aided NOMA systems. Additionally, the users' diversity orders follow a descending order according to their respective average channel gains. Furthermore, we expand discussions on the cases of power-efficient transmissions and imperfect channel state information (CSI). Monte Carlo simulations finally confirm our analysis.
KeywordChase combining diversity order HARQ incremental redundancy NOMA
DOI10.1109/TVT.2019.2950067
URLView the original
Language英语
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorYang,Guanghua
Affiliation1.Institute of Physical Internet and the School of Intelligent Systems Science and Engineering,Jinan University,Zhuhai,China
2.School of Telecommunications Engineering,Xidian University,Xi'an,China
3.Department of Information Systems Technology and Design,Singapore University of Technology and Design,Singapore,Singapore
4.School of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing,China
5.State Key Lab. of Internet of Things for Smart City and the Dept. of Elec. and Computer Engineering,University of Macau,Macao
Recommended Citation
GB/T 7714
Shi,Zheng,Zhang,Chenmeng,Fu,Yaru,et al. Achievable Diversity Order of HARQ-Aided Downlink NOMA Systems[J]. IEEE Transactions on Vehicular Technology,2020,69(1):471-487.
APA Shi,Zheng,Zhang,Chenmeng,Fu,Yaru,Wang,Hong,Yang,Guanghua,&Ma,Shaodan.(2020).Achievable Diversity Order of HARQ-Aided Downlink NOMA Systems.IEEE Transactions on Vehicular Technology,69(1),471-487.
MLA Shi,Zheng,et al."Achievable Diversity Order of HARQ-Aided Downlink NOMA Systems".IEEE Transactions on Vehicular Technology 69.1(2020):471-487.
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