摘要
针对系留无人机(unmanned aerial vehicle,UAV)协作通信的多链路调度问题,研究混合系统的中断概率性能。先提出基于路径衰耗最小化的UAV选择策略,即UAV群中选择具有最小路径衰耗的UAV为用户提供转发服务。然后,针对射频(radio frequency,RF)链路、空间光通信(free space optical,FSO)和毫米波(millimeter-wave,mmWave)链路的切换,提出基于最大瞬时信噪比和基于阈值的链路调度策略。基于最大瞬时信噪比调度策略选择具有最大瞬时信噪比的链路传输数据;基于阈值的链路调度策略选择具有最优性能的链路传输数据。最后,分析所提出的调度策略的中断概率性能。仿真结果表明,基于最大瞬时信噪比的调度策略的中断概率性能低于基于阈值的链路调度策略,并且基于阈值的链路调度策略的性能与阈值有密切关系。
For various link switching issue for tethered unmanned aerial vehicle-assisted communication,outage performance of hybrid communication systems is analyzed in this paper.Firstly,we propose a simple path loss-base UAV selection policy,namely,the UAV that minimizes the total path loss is choose to relay toward user.Then,for link switching among radio frequency link,free space optical link and millimeter-wave link,the maximum instantaneous SNR and threshold link switching policy are proposed in this paper.In maximum instantaneous SNR link switching policy,we select the link that has maximum instantaneous SNR;in threshold link switching policy,the intuition behind threshold combining is to use the link that offers maximum performance.We observed that selection combining is more reliable in terms of better outage performance than any individual PHY layer link and threshold combining.The threshold combining scheme can outperform the individual links by careful selection of the switching threshold.
作者
黄煜栋
郝平
Huang Yudong;Hao Ping(College of Information Engineering,Hangzhou Polytechnic,Hangzhou 311402,China;School of Computer Science and Technology,Zhejiang University of Technology,Hangzhou 310023,China)
出处
《国外电子测量技术》
北大核心
2021年第9期36-41,共6页
Foreign Electronic Measurement Technology
基金
浙江省高等教育“十三五”第一批教育教学改革项目(20180848)资助。
