Tracking reference phase with a Kalman filter in continuous-variable quantum key distribution

doi:10.1364/OE.399744

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	Tracking reference phase with a Kalman filter in continuous-variable quantum key distribution
	HUANG, BIAO 1,2,3,4; HUANG, YONGMEI 1,3; PENG, ZHENMING 2
刊名	Optics Express
	2020-09-01
卷号	28 期号:19 页码:28727-28739
ISSN号	1094-4087
DOI	10.1364/OE.399744
文献子类	期刊论文
英文摘要	The continuous-variable quantum key distribution with a local local-oscillator is extremely sensitive to the phase compensation noise caused by the inaccurate reference phase estimation. In order to overcome the influence of slow drift caused by the residual optical frequency difference, we utilize a vector Kalman filter to estimate and track the reference phase from pilots. The fast drift and slow drift are taken into account in the variation of the reference phase, so that phase estimation becomes more accurate than the conventional scalar Kalman filter. The mean square error of reference phase estimation is deduced theoretically, and the specified frame is designed to estimate the phase noise variance in real time. In simulations, the performances involving of the estimation accuracy, the actual excess noise and the secret key rate are compared between with four different phase estimation methods. The simulation results show that the vector Kalman filter is superior to the other methods, even though under a serious phase noise and a large optical frequency difference. © 2020 Optical Society of America.
出版地	WASHINGTON
WOS关键词	CARRIER RECOVERY ; NOISE ; SECURITY ; SIGNALS
WOS研究方向	Optics
语种	英语
出版者	OPTICAL SOC AMER
WOS记录号	WOS:000569207700120
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/10112]
专题	光电技术研究所_光电工程总体研究室（一室）
作者单位	1.University of Chinese, Academy of Sciences, Beijing; 100049, China; 2.University of Electronic Science and Technology of China, Chengdu; 610054, China; 3.Institute of Optics and Electronics Chinese, Academy of Sciences, Chengdu; 610209, China; 4.Southwest Communication Institute, Chengdu; 610041, China
推荐引用方式 GB/T 7714	HUANG, BIAO,HUANG, YONGMEI,PENG, ZHENMING. Tracking reference phase with a Kalman filter in continuous-variable quantum key distribution[J]. Optics Express,2020,28(19):28727-28739.
APA	HUANG, BIAO,HUANG, YONGMEI,&PENG, ZHENMING.(2020).Tracking reference phase with a Kalman filter in continuous-variable quantum key distribution.Optics Express,28(19),28727-28739.
MLA	HUANG, BIAO,et al."Tracking reference phase with a Kalman filter in continuous-variable quantum key distribution".Optics Express 28.19(2020):28727-28739.