Power Allocation for NOMA in D2D Relay Communications

作     者：Yan Cai Chunhua Ke Yiyang Ni Jun Zhang Hongbo Zhu Yan Cai;Chunhua Ke;Yiyang Ni;Jun Zhang;Hongbo Zhu

作者机构：Jiangsu Key Laboratory of Wireless CommunicationsNanjing University of Posts and TelecommunicationsNanjing 210003China Jiangsu Second Normal UniversityNanjing 210013China 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2021年第18卷第1期

页      面：61-69页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0839[工学-网络空间安全] 0804[工学-仪器科学与技术] 080402[工学-测试计量技术及仪器] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：This work was supported in part by the National Natural Science Foundation of China under Grant 61701201,U1805262,61871446 and 62071247 the Natural Science Foundation of Jiangsu Province(No.BK20170758),Six talent peaks project in Jiangsu Province. 

主　　题：device-to-device communication nonorthogonal multiple access decode-and-forward relaying power allocation rate analysis 

摘      要：Non-orthogonal multiple access(NOMA)is considered as one of the key technologies for the fifth generation(5G)wireless communications.The integration of NOMA and device-to-device(D2D)communications has recently attracted wide attention.In this paper,a relaying D2D communications assisted with cooperative relaying systems using NOMA(DRC-NOMA)is considered.We analyze the ergodic sum-rate for the proposed system and then derive the closed-form expressions.In addition,an optimal power allocation strategy maximizing the ergodic sum-rate is proposed based on these analysis results.Numerical results show the good agreement between the results of analysis and Monte Carlo method.The proposed DRC-NOMA has a great improvement of the ergodic sum-rate in the small regime of average channel gain of D2D pair.