雾对自由空间量子通信性能的影响  

Influence of Fog on Performance of Free-Space Quantum Communication

作　　者：张秀再[1,2] 徐茜 刘邦宇 Zhang Xiuzai;Xu Xi;Liu Bangyu(Jiangsu Collaborative Imnoution Center of Atmospheric Enrironment and Equipment Technology,Nanjing University of Information Science&Technology,Nanjing,Jiangsu 210044,China;School of Electronic and Information Engineering,Nanjing University of In,formation Science&Technology,Nanjing,Jjangsu 210044,China)

机构地区：[1]南京信息工程大学江苏省大气环境与装备技术协同创新中心,江苏南京210044 [2]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《光学学报》2020年第7期159-164,共6页Acta Optica Sinica

基　　金：国家自然科学基金青年科学基金(11504176,61601230);江苏省高校自然科学研究项目(13KJA510001);江苏省自然科学基金青年基金(BK20141004)。

摘　　要：为了研究雾对自由空间量子通信的影响,根据雾滴谱分布函数和消光系数,研究了雾的能见度及传输距离对链路衰减、量子通信信道容量、信道保真度及信道误码率的影响,并进行了仿真实验。结果表明,当传输距离为9 km,能见度分别为0.2 km和0.6 km时,对应的链路衰减,信道容量,信道保真度,信道误码率分别为0.76和0.25,0.24和0.4,0.91和0.97,0.01和3.26×10-7。由此可见,能见度小于1 km时,雾对各项性能影响较为显著。因此,应根据雾的能见度来调整通信系统的各项参数以保证通信的顺利进行。In order to study the effect of fog on quantum communication in free space, the effects of fog visibility and transmission distance on link attenuation, quantum communication channel capacity, channel fidelity and channel error rate are studied according to the distribution function and extinction coefficient of fog drop spectra. The simulation experiment is also conducted.The results show that when the transmission distance is 9 km and the visibility is 0.2 km and 0.6 km, the corresponding link decay, channel capacity, channel fidelity, channel error rate are 0.76 and 0.25, 0.24 and 0.4, 0.91 and 0.97, 0.01 and 3.26×10-7, respectively. It can be seen that when the visibility of foggy days is less than 1 km, the influence of fog on the performance is more significant. Therefore, the parameters of the communication system should be adjusted to ensure the smooth progress of communication based on fog visibility.

关 键 词：量子光学 量子通信 消光系数 能见度 链路衰减 信道容量 

分 类 号：TN929.1[电子电信—通信与信息系统] O436.2[电子电信—信息与通信工程]