系统工程与电子技术 ›› 2022, Vol. 44 ›› Issue (1): 292-298.doi: 10.12305/j.issn.1001-506X.2022.01.36

• 通信与网络 • 上一篇    下一篇

基于单源最优路径的NOMA中继选择与协作传输

陆音1,2,3,*, 汪高瑜3, 杨楚瀛3, 杨凌青3, 赵坤3, 朱洪波3   

  1. 1. 南京邮电大学物联网学院, 江苏 南京 210003
    2. 南京邮电大学宽带无线通信与传感网技术教育部 重点实验室, 江苏 南京 210003
    3. 南京邮电大学江苏省无线通信重点实验室, 江苏 南京 210003
  • 收稿日期:2020-07-22 出版日期:2022-01-01 发布日期:2022-01-19
  • 通讯作者: 陆音
  • 作者简介:陆音(1970—),男,研究员,博士,主要研究方向为无线通信、物联网技术与应用|汪高瑜(1996—),男,硕士研究生,主要研究方向为无线通信|杨楚瀛(2000—),男,本科生,主要研究方向为物联网技术与应用|杨凌青(1996—),女,硕士研究生,主要研究方向为无线通信|赵坤(1993—),男,硕士研究生,主要研究方向为无线通信|朱洪波(1956—),男,教授,博士,主要研究方向为物联网与下一代网络技术
  • 基金资助:
    国家自然科学基金(61271236);国家自然科学基金(61871446);江苏省高等学校自然科学研究重大项目(17KJA510004);江苏省研究生科研与实践创新计划项目(SJCX19_0239);江苏省研究生科研与实践创新计划项目(KYCX19_0943);南京邮电大学宽带无线通信与传感网技术教育部重点实验室开放研究基金(JZNY202114)

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

Yin LU1,2,3,*, Gaoyu WANG3, Chuying YANG3, Lingqing YANG3, Kun ZHAO3, Hongbo ZHU3   

  1. 1. College of Internet of Things, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
    2. Key Lab of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
    3. Jiangsu Key Laboratory of Wireless Communications, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • Received:2020-07-22 Online:2022-01-01 Published:2022-01-19
  • Contact: Yin LU

摘要:

目前,在非正交多址接入(non-orthogonal multiple access,NOMA)中继通信的研究中,中继用户的选择是随机的,并没有考虑中继节点之间信道条件的差异。为了得到信道条件较好的中继用户,提出一种基于单源最优路径的中继选择策略,从基站广播信号以用户为节点,设定信道参数,寻找最佳传输通路。当信号到达目标节点后,基站从目标节点处收集所有可达通路,通过对比各通路的信道参数,选出一条最好的传输通路。基于所提中继选择策略,在非机会式NOMA系统中,提出一种新的协作传输方法,该方法在中继传输过程中剔除了多余信号以降低信号间干扰。仿真结果表明,在相同条件下,采用所提策略的协作传输方法比随机中继选择用户中断概率更低,有效降低了系统复杂度。

关键词: 非正交多址接入, 中继选择, 单源最优路径, 信道参数

Abstract:

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.

Key words: non-orthogonal multiple access (NOMA), relay selection, single source optimal path, channel parameter

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