Novel Energy-Efficiency Enhancement Schemes for Asynchronous Non-Orthogonal Multiple Access

被引：0
|
作者：
Wang, He [1 ]
Li, Xiangming [1 ]
Ye, Neng [1 ]
Wang, Aihua [1 ]
机构：
[1] Beijing Inst Technol, Sch Informat & Elect, Beijing, Peoples R China
来源：
2019 IEEE INTERNATIONAL SYMPOSIUM ON BROADBAND MULTIMEDIA SYSTEMS AND BROADCASTING (BMSB) | 2019年
关键词：
Asynchronous transmission; energy efficiency; non-orthogonal multiple access; rate splitting; 5G NR; multiplexing;
D O I：
10.1109/bmsb47279.2019.8971840
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Non-orthogonal multiple access (NOMA) has been extensively studied in 5G New Radio (NR) for massive multimedia transmissions in scenarios such as massive Machine-Type Communication (mMTC). Existing researches normally assume synchronous user-multiplexing, which may introduce additional signaling overhead as well as large power consumption. However, the users in mMTC may not have strict synchronization due to signaling reduction and energy efficiency (EE) concern. To this end, two enhanced NOMA schemes are proposed to promote EE of asynchronous NOMA. Specifically, discontinuous transmission and rate splitting are respectively introduced to provide chances for successive interference cancellation receiving, which promotes the received SINR. Numerical simulations validate the advantages of the proposed schemes with respect to EE.
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