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Title:
SATELLITE-GROUND QUANTUM KEY DISTRIBUTION FAST TIME SYNCHRONIZATION METHOD BASED ON LASER PULSE
Document Type and Number:
WIPO Patent Application WO/2019/205214
Kind Code:
A1
Abstract:
Disclosed by the present invention is a fast time synchronization method on the basis of a laser pulse for satellite-ground quantum key distribution, which comprises the following steps: S1: a satellite and a ground station recording a time measurement sequence of detected synchronous pulses and a quantum state signal respectively and labeling same as TA and TB; S2: extracting a synchronous pulse time measurement sequence SA from TA, and recording an index address sequence LA of SA in TA; S3: extracting a synchronous pulse time measurement sequence SB from TB, and recording an index address sequence LB of SB in TB; S4: calculating a peak saliency value Sτ for determining time synchronization performance; S5: calculating a background compliance count Racc; S6: accurately mapping the synchronous pulses and calculating a synchronous pulse mapping sequence MS; S7: and according to the MS sequence, using a measurement time on the satellite as the standard time, and accurately mapping the quantum state signal measured by the ground station to obtain a ground station quantum state signal mapping sequence MT. The present invention has the advantages of being adaptive, fast, highly efficient and accurate.

Inventors:
WU CHUNQING (CN)
Application Number:
PCT/CN2018/088123
Publication Date:
October 31, 2019
Filing Date:
May 24, 2018
Export Citation:
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Assignee:
DEYA INST OF CIVIL MILITARY INTEGRATED INNOVATION SHUNDE FOSHAN (CN)
International Classes:
H04L9/08
Domestic Patent References:
WO2010127723A12010-11-11
Foreign References:
CN107947930A2018-04-20
CN104993925A2015-10-21
CN107856888A2018-03-30
Other References:
SHEN, QI: "The Research on High Resolution Time to Digital Convertion for Quantum Communication", ELECTRONIC TECHNOLOGY & INFORMATION SCIENCE , CHINA DOCTOR DISSERTATION FULL-TEXT DATABASE (ELECTRONIC JOURNAL, 15 April 2014 (2014-04-15)
SHEN, ZEYUAN ET AL.: "Synchronous Scheme and Experimental Realization in Continuous Variable Quautum Key Distribution System", CHINESE JOURNAL OF LASERS, vol. 40, no. 3, 31 March 2013 (2013-03-31)
REN, JIGANG ET AL.: "Synchronization for Quantum Key Distribution from Ground to Satellite", JOURNAL OF INFRARED AND MILLIMETER WAVES, vol. 30, no. 4, 31 August 2011 (2011-08-31)
ZHAO, BAOKANG ET AL.: "A Tutorial on Quantum Key Distribution", 2015 10TH INTERNATIONAL CONFERENCE ON BROADBAND AND WIRELESS COMPUTING, COMMUNICATION AND APPLICATIONS (BWCCA, 3 March 2016 (2016-03-03)
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