TY - JOUR
T1 - A survey of non-orthogonal multiple access for 5G
AU - Dai, Linglong
AU - Wang, Bichai
AU - Ding, Zhiguo
AU - Wang, Zhaocheng
AU - Chen, Sheng
AU - Hanzo, Lajos
N1 - Funding Information:
Manuscript received October 11, 2017; revised March 20, 2018; accepted May 4, 2018. Date of publication May 11, 2018; date of current version August 21, 2018. This work was supported in part by the National Natural Science Foundation of China for Outstanding Young Scholars under Grant 61722109, in part by the National Natural Science Foundation of China under Grant 61571270, in part by the Royal Academy of Engineering under the U.K.–China Industry Academia Partnership Programme Scheme under Grant U.K.-CIAPP\49. The work of Z. Ding was supported in part by the U.K. EPSRC under Grant EP/ L025272/1 and in part by H2020-MSCA-RISE-2015 under Grant 690750. The work of L. Hanzo was supported by the European Research Council’s Advanced Fellow Grant QuantCom. (Corresponding author: Bichai Wang; Lajos Hanzo.) L. Dai, B. Wang, and Z. Wang are with Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China (e-mail: [email protected]; [email protected]; [email protected]).
Publisher Copyright:
© 1998-2012 IEEE.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - In the fifth generation (5G) of wireless communication systems, hitherto unprecedented requirements are expected to be satisfied. As one of the promising techniques of addressing these challenges, non-orthogonal multiple access (NOMA) has been actively investigated in recent years. In contrast to the family of conventional orthogonal multiple access (OMA) schemes, the key distinguishing feature of NOMA is to support a higher number of users than the number of orthogonal resource slots with the aid of non-orthogonal resource allocation. This may be realized by the sophisticated inter-user interference cancellation at the cost of an increased receiver complexity. In this paper, we provide a comprehensive survey of the original birth, the most recent development, and the future research directions of NOMA. Specifically, the basic principle of NOMA will be introduced at first, with the comparison between NOMA and OMA especially from the perspective of information theory. Then, the prominent NOMA schemes are discussed by dividing them into two categories, namely, power-domain and code-domain NOMA. Their design principles and key features will be discussed in detail, and a systematic comparison of these NOMA schemes will be summarized in terms of their spectral efficiency, system performance, receiver complexity, etc. Finally, we will highlight a range of challenging open problems that should be solved for NOMA, along with corresponding opportunities and future research trends to address these challenges.
AB - In the fifth generation (5G) of wireless communication systems, hitherto unprecedented requirements are expected to be satisfied. As one of the promising techniques of addressing these challenges, non-orthogonal multiple access (NOMA) has been actively investigated in recent years. In contrast to the family of conventional orthogonal multiple access (OMA) schemes, the key distinguishing feature of NOMA is to support a higher number of users than the number of orthogonal resource slots with the aid of non-orthogonal resource allocation. This may be realized by the sophisticated inter-user interference cancellation at the cost of an increased receiver complexity. In this paper, we provide a comprehensive survey of the original birth, the most recent development, and the future research directions of NOMA. Specifically, the basic principle of NOMA will be introduced at first, with the comparison between NOMA and OMA especially from the perspective of information theory. Then, the prominent NOMA schemes are discussed by dividing them into two categories, namely, power-domain and code-domain NOMA. Their design principles and key features will be discussed in detail, and a systematic comparison of these NOMA schemes will be summarized in terms of their spectral efficiency, system performance, receiver complexity, etc. Finally, we will highlight a range of challenging open problems that should be solved for NOMA, along with corresponding opportunities and future research trends to address these challenges.
KW - 5G
KW - low latency
KW - massive connectivity
KW - multi-user detection (MUD)
KW - non-orthogonal multiple access (NOMA)
KW - overloading
KW - spectral efficiency
UR - http://www.scopus.com/inward/record.url?scp=85046720352&partnerID=8YFLogxK
U2 - 10.1109/COMST.2018.2835558
DO - 10.1109/COMST.2018.2835558
M3 - Article
AN - SCOPUS:85046720352
SN - 1553-877X
VL - 20
SP - 2294
EP - 2323
JO - IEEE Communications Surveys and Tutorials
JF - IEEE Communications Surveys and Tutorials
IS - 3
M1 - 8357810
ER -