A Near Optimal Power Allocation Scheme for Cooperative Relay Networking with NOMA  

作　　者：Haiyang Yu Wei Duan Guoan Zhang Yancheng Ji Xiaojun Zhu Jaeho Choi 

机构地区：[1]The School of Electronics and Information, Nantong University [2]Division of Electronics and Information Engineering, Chonbuk National University [3]Department of ECE, CAIIT, Chonbuk National University

出　　处：《China Communications》2019年第3期122-131,共10页中国通信（英文版）

基　　金：partly supported by the research funds of the National Natural Science Foundation of China (NO. 61371113, 61401241);the research funds of Chonbuk National University in 2017;BK-21 of Korea and the Nantong University-Nantong Joint Research Center for Intelligent Information Technology (KFKT2016B04)

摘　　要：In this paper, we propose cooperative relay networks with non-orthogonal multiple access in order to design a near-optimal power allocation strategy. Like other next generation wireless technologies, spatially multiplexed transmissions are achieved by relay nodes which enables decode-and-forward relaying of a new superposition code after reception from the source. It is worth noting that, since it is hard to exactly prove the proposed PA scheme, due the fact that it is one kind of the approximate conjectures. Therefore, mathematical and numerical methods have been used to clarify the feasibility of the proposal. Numerical results indicate that it is able to asymptotically achieve the optimal sum rate at the higher signal-to-noise ratio region with the proposed strategy applied instead of negligible performance loss.In this paper, we propose cooperative relay networks with non-orthogonal multiple access in order to design a near-optimal power allocation strategy. Like other next generation wireless technologies, spatially multiplexed transmissions are achieved by relay nodes which enables decode-and-forward relaying of a new superposition code after reception from the source. It is worth noting that, since it is hard to exactly prove the proposed PA scheme, due the fact that it is one kind of the approximate conjectures. Therefore, mathematical and numerical methods have been used to clarify the feasibility of the proposal. Numerical results indicate that it is able to asymptotically achieve the optimal sum rate at the higher signal-to-noise ratio region with the proposed strategy applied instead of negligible performance loss.

关 键 词：non-orthogonal multiple access COOPERATIVE multi-relay networks DECODE-AND-FORWARD TWO-STAGE power ALLOCATION 

分 类 号：TN[电子电信]