电子学报 ›› 2020, Vol. 48 ›› Issue (6): 1169-1176.DOI: 10.3969/j.issn.0372-2112.2020.06.018

• 学术论文 • 上一篇    下一篇

基于NOMA的全双工多层异构网下行链路覆盖分析

杨小蓉1, 贾向东1,2, 范巧玲1, 陈玉宛1   

  1. 1. 西北师范大学计算机科学与工程学院, 甘肃兰州 730070;
    2. 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:2018-10-22 修回日期:2019-11-07 出版日期:2020-06-25 发布日期:2020-06-25
  • 通讯作者: 贾向东
  • 作者简介:杨小蓉 女,1993年3月出生于甘肃省平凉市.现为西北师范大学计算机科学与工程学院硕士研究生.主要研究方向为无线通信NOMA、大规模MIMO和异构网络等关键技术. E-mail:954016199@qq.com
    范巧玲 女,1993年6月出生于甘肃省兰州市.现为西北师范大学计算机科学与工程学院硕士研究生.主要研究方向为无线通信及其关键技术. E-mail:965347284@qq.com
    陈玉宛 女,1994年10月出生于河南省南阳市.现为西北师范大学计算机科学与工程学院硕士研究生.主要研究方向为无线通信及其关键技术. E-mail:1256373765@qq.com
  • 基金资助:
    国家自然科学基金(No.61861039,No.61261015)

Coverage Probability Analysis of Downlink About Full-Duplex Multi-tier HetNet Based on NOMA

YANG Xiao-rong1, JIA Xiang-dong1,2, FAN Qiao-ling1, CHEN Yu-wan1   

  1. 1. College of Computer Science and Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China;
    2. Wireless Communication Key Lab of Jiangsu Province, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210003, China
  • Received:2018-10-22 Revised:2019-11-07 Online:2020-06-25 Published:2020-06-25

摘要: 针对异构网(Heterogeneous Network,HetNet)无线回程,现有研究主要集中于提升网络吞吐量,而对回程覆盖性能研究较少.由此,本文构造了一种在小小区基站(Small cell Base Station,SBS)上结合全双工(Full-Duplex,FD)和非正交多址接入(Non-Orthogonal Multiple Access,NOMA)技术的大规模多输入多输出(Multiple Input Multiple Output,MIMO)辅助多层HetNet模型.利用信干比(Signal-to-Interference Ratio,SIR)来模拟有源SBS的分布,得出不同类型接收端的干扰;然后推导了移动用户(Mobile User,MU)下行链路覆盖概率闭合表达式.仿真和数值结果表明,SBS下行链路覆盖概率会随着小小区下行链路功率共享系数的增加而减小;此外,通过对比NOMA和正交多址接入(Orthogonal Multiple Access,OMA)以及FD和半双工(Half-Duplex,HD)对下行链路覆盖性能的影响,本文提出的方案能显著提升网络性能.

关键词: 异构网, 大规模多输入多输出, 非正交多址接入, 全双工, 功率共享

Abstract: For wireless backhaul of heterogeneous networks (HetNet),the existing researches mainly focus on improving the network throughput.However,few research is done on the coverage performance in the backhaul link.Therefore,this paper constructs a massive multiple input multiple output (MIMO) enabled multi-tier heterogeneous network model combing full-duplex (FD) and non-orthogonal multiple access (NOMA) technologies on small cell base stations (SBSs).The signal-to-interference ratio (SIR) is utilized to simulate the distribution of active SBS,and the interference is obtained at different types of receivers.Then,the mobile user (MU) downlink coverage probability closed-form expressions are deduced.Simulation and numerical results show that the SBS downlink coverage probability decreases as the downlink power sharing coefficient of the small cell increases.In addition,by comparing the effects of NOMA and orthogonal multiple access (OMA),FD and half-duplex (HD) on downlink coverage performance,network performance of the proposed scheme is significantly improved.

Key words: heterogeneous networks, massive multiple input multiple output, non-orthogonal multiple access, full-duplex, power sharing

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