基于门限判断DF协议的多无人机中继传输中断性能分析

doi:10.11959/j.issn.1000-0801.2020250

电信科学 ›› 2020, Vol. 36 ›› Issue (8): 103-111.doi: 10.11959/j.issn.1000-0801.2020250

基于门限判断DF协议的多无人机中继传输中断性能分析

淡振雷,吴雪雯,欧阳键,汪萧萧,顾晨伟,林敏

南京邮电大学通信与信息工程学院，江苏南京 210003

修回日期:2020-08-05 出版日期:2020-08-20 发布日期:2020-08-26
作者简介:淡振雷（1995- ），男，南京邮电大学通信与信息工程学院硕士生，主要研究方向为无人机通信|吴雪雯（1995- ），女，南京邮电大学通信与信息工程学院硕士生，主要研究方向为卫星通信、物理层安全|欧阳键（1983- ），男，南京邮电大学通信与信息工程学院副教授、硕士生导师，主要研究方向为无人机通信技术、基于深度学习的信号处理技术、无线绿色安全传输技术等|汪萧萧（1996- ），男，南京邮电大学通信与信息工程学院硕士生，主要研究方向为卫星通信、物理层安全|顾晨伟（1995- ），男，南京邮电大学通信与信息工程学院硕士生，主要研究方向为卫星通信、物理层安全|林敏（1972- ），男，南京邮电大学通信与信息工程学院教授、博士生导师，主要研究方向为无线/卫星通信、智能信号处理等
基金资助:
重点国际合作项目(61720106003);上海航天科技创新基金资助项目(SAST2019-095);基础加强计划技术领域基金项目(2019-JCJQ-JJ-226);江苏省研究生科研与实践创新计划项目(SJCX19_0237)

Outage performance analysis for multi-UAV relay systems with threshold-based DF protocol

Zhenlei DAN,Xuewen WU,Jian OUYANG,Xiaoxiao WANG,Chenwei GU

College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

Revised:2020-08-05 Online:2020-08-20 Published:2020-08-26
Supported by:
The Key International Cooperation Research Project(61720106003);Shanghai Aerospace Science and Technology Innovation Foundation(SAST2019-095);Fund Project in the Field of Basic Strengthening Plan Technology(2019-JCJQ-JJ-226);Postgraduate Research ＆ Practice Innovation Program of Jiangsu Province(SJCX19_0237)

摘要/Abstract

摘要：

UAV（unmanned aerial vehicle，无人机）中继系统作为远距离数据传输的一种有效手段，成为当前无线通信领域的一个研究热点。首先在考虑路径损耗等实际参数的前提下，建立了基于多个UAV的中继协作传输系统模型，得到采用门限判断 DF（decode-and-forward，译码转发）协议时系统的最大输出 SNR （signal-to-noise ratio，信噪比）表达式。接着，假设上行链路和下行链路均服从Rician分布，推导出多UAV中继传输系统的中断概率闭合表达式，并且进一步得到了高信噪比条件下中断概率的渐近表达式、系统的分集度和阵列增益，为分析系统参数对中断性能的影响提供了更加便捷的方法。最后，计算机仿真验证了理论分析的正确性，并且定量分析了无人机中继个数、配置的天线数目以及中断阈值对系统中断性能的影响，为实际的系统设计和应用提供参考。

关键词: 中继传输, 无人机通信, 译码转发, 中断概率, 性能分析

Abstract:

The unmanned aerial vehicle (UAV) relay system has become a hot topic as an effective method for the remote transmission in wireless communications.By taking path loss into account,a relay cooperative transmission system model based on multiple UAVs was established firstly,and the maximum output signal-to-noise ratio (SNR) of the system with threshold-based decode-and-forward (DF) protocol was obtained.Then,by assuming that both the uplink and downlink experience Rician distribution,the closed-form expression for outage probability (OP) of the considered system with multiple UAVs was derived.Furthermore,the asymptotic OP formula at high SNR was also derived to show the diversity order and array gain of the considered system,which were convenient to reveal the effects of system parameters on the outage performance.Finally,the computer simulations verify the correctness of the theoretical analysis,and reveal the effect of the relay number,antenna number and the threshold on the system outage performance,thus the proposed scheme can provide guidance for the system design and application.

Key words: relay transmission, UAV communication, decode-and-forward, outage probability, performance analysis

中图分类号:

TN925

淡振雷,吴雪雯,欧阳键,汪萧萧,顾晨伟,林敏. 基于门限判断DF协议的多无人机中继传输中断性能分析[J]. 电信科学, 2020, 36(8): 103-111.

Zhenlei DAN,Xuewen WU,Jian OUYANG,Xiaoxiao WANG,Chenwei GU. Outage performance analysis for multi-UAV relay systems with threshold-based DF protocol[J]. Telecommunications Science, 2020, 36(8): 103-111.

图/表 6

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参数	值
载波频率f/GHz	2
路径损耗常数α	10.6
路径损耗常数β	0.18
直达路径衰落指数η_LoS/dB	1
非直达路径衰落指数η_NLoS/dB	20

基于门限判断DF协议的多无人机中继传输中断性能分析

Outage performance analysis for multi-UAV relay systems with threshold-based DF protocol

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