NDLI: Investigation on hybrid automatic repeat request (HARQ) design for NOMA with SU-MIMO

Content Provider	IEEE Xplore Digital Library
Author	Anxin Li Benjebbour, A. Xiaohang Chen Huiling Jiang Kayama, H.
Copyright Year	2015
Abstract	Non-orthogonal multiple access (NOMA) utilizing power domain and advanced receiver has been considered as a very promising candidate radio access technology for future wireless communication systems. Hybrid automatic repeat request (HARQ), as an indispensable part of link adaptation, plays a very important role in reliable high speed packet data service through exploiting retransmission diversity and channel coding gain. In this paper, we investigate HARQ design for downlink NOMA with single user-multiple input multiple output (SU-MIMO). The impacts of user pairing, precoding matrix adaptation and transmission power assignment (TPA) ratio adaptation in retransmission on NOMA performance are investigated. An enhanced HARQ algorithm is proposed, where opportunistically HARQ combining is applied and the TPA of retransmission considers HARQ combining gain of the retransmission user. It is found that HARQ probability of NOMA is much higher than that of OMA and flexible retransmission strategies could increase performance gain of NOMA. Furthermore, it found the (wrong, correct) is the dominate case in NOMA HARQ and thus is of most importance for enhanced NOMA HARQ design. Simulation results show the proposed HARQ algorithm is effective and can achieve better performance than the existing algorithm.
Starting Page	590
Ending Page	594
File Size	639030
Page Count	5
File Format	PDF
e-ISBN	9781467367820
DOI	10.1109/PIMRC.2015.7343368
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-08-30
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Interference Signal to noise ratio MIMO Receivers Algorithm design and analysis Silicon carbide Downlink
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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