摘要
量子卫星星舰通信是量子保密通信的重要应用场景之一,在海面上,由于不同风速所引起的气溶胶粒子浓度发生剧烈变化,而气溶胶粒子浓度的剧变,必然导致星舰量子链路性能的剧烈衰减.然而,有关不同海面风速与量子卫星星舰通信信道参数关系的研究,迄今尚未展开.本文根据海面风速与气溶胶的Gras模型,分别建立了风速与星舰量子信道误码率、信道容量和信道平均保真度的定量关系.仿真结果表明,当风速分别为4 m/s和20 m/s时,海洋大气信道误码率、信道容量、信道平均保真度分别依次为4.62×10^-3和4.91×10^-3、0.957和0.65、0.999和0.974.由此可见,风速对海上量子通信性能有显著的影响.因此,为了提高通信的可靠性,应根据风速大小,自适应调整系统的各项参数.
In the ocean atmosphere boundary layer far from the continent,marine aerosols generally include two types:sea salt aerosols and secondary marine aerosols.The sea salt aerosols,also called sea salt droplets,stay in the atmosphere for a short time.The sea salt aerosols are produced by the splashing of waves caused by sea breeze on the sea surface.Quantum satellite-to-ship communication is one of the important application scenarios of quantum secret communication.The quantum satellite-to-ship communication is an important part of building a global quantum communication network.In the South China Sea,because the change of wind speed will cause a sharp change in the concentration of aerosol particles and the sharp change of the concentration of aerosol particles can change its own extinction characteristics,the change of aerosol extinction characteristics will inevitably lead to a dramatic attenuation of the satellite-to-ship’s quantum link performance.However,the research on the relationship between wind speed on the sea surface and quantum satellite satelliteto-ship communication channel parameters has not been carried out so far.In this paper,based on the Gras model of wind speeds on the sea surface and aerosol,the quantitative relationship between wind speed and satellite-to-ship quantum channel error rate,channel capacity and channel average fidelity are established respectively.The simulation results show that when the transmission distance is constant,as the sea surface wind speed increases,the channel bit error rate increases;as the wind speed increases,the channel capacity of quantum satellite satellite-to-ship communication decreases;when the source probability is constant,as the wind speed increases,the average fidelity of the channel shows a decreasing trend.When the wind speeds are 4 m/s and 20 m/s,the oceanic atmospheric channel error rate,channel capacity,and channel average fidelity are respectively 4.62×10^-3 and 4.91×10^-3,0.957 and 0.65,0.999 and 0.974.It can be seen that the wind speed has a si
作者
聂敏
张帆
杨光
张美玲
孙爱晶
裴昌幸
Nie Min;Zhang Fan;Yang Guang;Zhang Mei-Ling;Sun Ai-Jing;Pei Chang-Xing(School of Communication and Information Engineering,Xi’an University of Post and Telecommunications,Xi’an 710121,China;School of Electronics and Information,Northwestern Polytechnical University,Xi’an 710072,China;State Key Laboratory of Integrated Service Networks,Xidian University,Xi’an 710071,China)
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2021年第4期91-96,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:61971348,61201194)
陕西省国际科技合作与交流计划项目(批准号:2015KW-013)
陕西省教育厅科研计划项目(批准号:16JK1711)资助的课题.
关键词
气溶胶粒子浓度
海上风速
量子卫星通信
退极化信道
aerosol particle concentration
wind speed at sea
quantum satellite communication
depolarizing channel
