光学学报, 2020, 40 (7): 0727001, 网络出版: 2020-04-15
雾对自由空间量子通信性能的影响 下载: 1114次
Influence of Fog on Performance of Free-Space Quantum Communication
量子光学 量子通信 消光系数 能见度 链路衰减 信道容量 quantum optics quantum communication extinction coefficient visibility link attenuation channel capacity
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。
Abstract
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.
张秀再, 徐茜, 刘邦宇. 雾对自由空间量子通信性能的影响[J]. 光学学报, 2020, 40(7): 0727001. Xiuzai Zhang, Xi Xu, Bangyu Liu. Influence of Fog on Performance of Free-Space Quantum Communication[J]. Acta Optica Sinica, 2020, 40(7): 0727001.