期刊
PHYSICAL COMMUNICATION
卷 46, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.phycom.2021.101296
关键词
Non-orthogonal multiple access (NOMA); Device-to-device (D2D) communication; Power optimization; Imperfect SIC; Dual theory
资金
- National Key Research and Development Program, China [2017YFC0803403]
- National Natural Science Foundation of China [62071275]
Combining D2D communication with NOMA is an efficient solution to enhance the spectral efficiency and connection density of beyond fifth-generation cellular networks. The paper optimizes power allocation for NOMA-enabled D2D communication, using dual theory and sub-gradient method. The proposed optimization scheme significantly improves the data rate of D2D communication compared to benchmark schemes.
The combination of device-to-device (D2D) communication with non-orthogonal multiple access (NOMA) is an efficient solution to enhance the spectral efficiency and connection density of beyond fifth-generation cellular networks. In the paper, we optimize the power allocation of NOMA-enabled D2D communication. In particular, we formulate sum data rate maximization problem subject to the quality of services of cellular user and transmit power of D2D communication. To obtain the efficient solution, we exploit dual theory by using sub-gradient method to solve the dual variables. To gauge the performance of the proposed optimal power allocation scheme, the results are also compared with average power allocation schemes and orthogonal multiple access schemes. The simulation results unveil that the proposed optimization scheme significantly improve the data rate of D2D communication compared to the benchmark schemes. (C) 2021 Elsevier B.V. All rights reserved.
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