NOMA relay selection and cooperative transmission based on single source optimal path

被引：0
|
作者：
Lu Y. [1 ,2 ,3 ]
Wang G. [3 ]
Yang C. [3 ]
Yang L. [3 ]
Zhao K. [3 ]
Zhu H. [3 ]
机构：
[1] College of Internet of Things, Nanjing University of Posts and Telecommunications, Nanjing
[2] Key Lab of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing
[3] Jiangsu Key Laboratory of Wireless Communications, Nanjing University of Posts and Telecommunications, Nanjing
来源：
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | 2022年 / 44卷 / 01期
关键词：
Channel parameter; Non-orthogonal multiple access (NOMA); Relay selection; Single source optimal path;
D O I：
10.12305/j.issn.1001-506X.2022.01.36
中图分类号：
学科分类号：
摘要：
Current non-orthogonal multiple access (NOMA) relay communication uses the random relay selection strategy without considering the differences in channel conditions between relay nodes. In order to provide relay users with better channel conditions, a new relay selection strategy based on a single source optimal path is proposed. The strategy starts with the signal broadcasting from base stations and treats users as nodes. Channel parameters are configured to find the best transmission path. After the signal reaches the target node, the base station collects all the reachable paths and performs a comparison of the channel parameters to find the best transmission path. Combining the proposed strategy with non-opportunistic NOMA, a new cooperative transmission method is obtained. This method eliminates redundant signals during relay transmission, thus the inter-signal interference is reduced. Simulation results show that the proposed method can achieve lower user outage probability and system complexity than the random relay selection strategy under the same conditions. © 2022, Editorial Office of Systems Engineering and Electronics. All right reserved.
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页码：292 / 298
页数：6
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