TY - JOUR
T1 - Unveiling the Importance of SIC in NOMA Systems - Part 1
T2 - State of the Art and Recent Findings
AU - Ding, Zhiguo
AU - Schober, Robert
AU - Poor, H. Vincent
N1 - Funding Information:
Manuscript received May 17, 2020; revised July 7, 2020; accepted July 23, 2020. Date of publication July 28, 2020; date of current version November 11, 2020. The work of Zhiguo Ding was supported by the U.K. Engineering and Physical Sciences Research Council under grant number EP/P009719/2. The work of H. Vincent Poor was supported by the U.S. National Science Foundation under Grant CCF-1908308. The associate editor coordinating the review of this letter and approving it for publication was X. Lei. (Corresponding author: Zhiguo Ding.) Zhiguo Ding is with the Department of Electrical Engineering, Princeton University, Princeton, NJ 08544 USA, and also with the School of Electrical and Electronics Engineering, The University of Manchester, Manchester M1 3BB, U.K. (e-mail: [email protected]).
Publisher Copyright:
© 1997-2012 IEEE.
PY - 2020/11
Y1 - 2020/11
N2 - The key idea of non-orthogonal multiple access (NOMA) is to serve multiple users simultaneously at the same time and frequency, which can result in excessive multiple-access interference. As a crucial component of NOMA systems, successive interference cancelation (SIC) is key to combating this multiple-access interference, and is the focus of this letter, where an overview of SIC decoding order selection schemes is provided. In particular, selecting the SIC decoding order based on the users' channel state information (CSI) and the users' quality of service (QoS), respectively, is discussed. The limitations of these two approaches are illustrated, and then a recently proposed scheme, termed hybrid SIC, which dynamically adapts the SIC decoding order is presented and shown to achieve a surprising performance improvement that cannot be realized by the conventional SIC decoding order selection schemes individually.
AB - The key idea of non-orthogonal multiple access (NOMA) is to serve multiple users simultaneously at the same time and frequency, which can result in excessive multiple-access interference. As a crucial component of NOMA systems, successive interference cancelation (SIC) is key to combating this multiple-access interference, and is the focus of this letter, where an overview of SIC decoding order selection schemes is provided. In particular, selecting the SIC decoding order based on the users' channel state information (CSI) and the users' quality of service (QoS), respectively, is discussed. The limitations of these two approaches are illustrated, and then a recently proposed scheme, termed hybrid SIC, which dynamically adapts the SIC decoding order is presented and shown to achieve a surprising performance improvement that cannot be realized by the conventional SIC decoding order selection schemes individually.
KW - hybrid successive interference cancellation (SIC)
KW - Non-orthogonal multiple access (NOMA)
KW - outage probability error floors
UR - http://www.scopus.com/inward/record.url?scp=85096175218&partnerID=8YFLogxK
U2 - 10.1109/LCOMM.2020.3012604
DO - 10.1109/LCOMM.2020.3012604
M3 - Article
AN - SCOPUS:85096175218
SN - 1089-7798
VL - 24
SP - 2373
EP - 2377
JO - IEEE Communications Letters
JF - IEEE Communications Letters
IS - 11
M1 - 9151196
ER -