A Data Synchronization Method for Continuous Variable Quantum Key Distribution System Based on Local Oscillator Light
A quantum key distribution and data synchronization technology, applied in the field of data transmission, can solve the problems of reduced data utilization efficiency, slow system synchronization rate, and reduced modulation data, so as to improve the signal-to-noise ratio, increase the complexity, and improve the security key. rate effect
Active Publication Date: 2020-09-01
BEIJING UNIV OF POSTS & TELECOMM +1
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Due to the extremely low signal-to-noise ratio, the success rate of synchronization criteria for this kind of data is extremely low, resulting in a slow system synchronization rate
On the other hand, in order to improve the success rate of synchronous judgment, it is necessary to increase the amount of synchronous data. In this way, the proportion of modulated data will be correspondingly reduced, reducing the data utilization efficiency of the entire system.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] In the present invention, by loading data synchronization information on the local oscillator light, the continuous variable quantum key distribution data synchronization is efficiently realized, and the specific steps are as follows:
[0028] 1. The sending end selects the appropriate voltage 5V, 3.5V and 0V as the high, medium and low modulation voltages for synchronization and synchronous monitoring, and 5V and 0V as the voltage of the pulse modulation signal. The duty cycle of the pulse modulation signal is 10%. Put a 30-bit synchronous sequence at the head of the pulse modulation signal, and insert a 15-bit synchronous monitoring sequence into the pulse modulation signal every time 100M modulation data is sent. Synchronization, synchronous monitoring and pulse modulation signals are modulated by an amplitude modulator to generate an optical pulse sequence, and the optical pulse sequence is divided into two parts by a beam splitter according to 10 / 90, 10% of which i...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a data synchronization method based on local oscillator light in continuous variable quantum secret key distribution. The method is used for data synchronization between a transmitting end and a receiving end efficiently and rapidly. Different from the existing method that a synchronization sequence is inserted into secret key data to modulate signal light, data synchronization is achieved by modulating the local oscillator light in a continuous variable quantum secret key distribution system. The method includes the following steps that 1, the transmitting end generates a data synchronization sequence and a data synchronization monitoring sequence; 2, the receiving end matches the synchronization sequences through the local oscillator light to complete data synchronization; 3, the receiving end carries out synchronous monitoring through the local oscillator light. Information is loaded on the local oscillator light to achieve data synchronization, the defects that in the existing data synchronization method based on data modulation, the utilization rate of the data is low, and the success rate is low are overcome, the tolerance to noise interference is high, and the reliability and efficiency of the system are improved.
Description
technical field [0001] The invention relates to the field of data transmission, in particular to continuous variable quantum key distribution data transmission synchronization technology, in particular to an efficient data synchronization method based on continuous variable quantum key distribution local oscillator light. Background technique [0002] Continuous variable quantum key distribution technology is a key generation technology based on the basic principles of quantum mechanics, which guarantees the unconditional security of key distribution from physical theory. In the continuous variable quantum key distribution system, the energy of the quantum signal is very weak, so the signal-to-noise ratio of the data obtained at the receiving end is extremely low, and it becomes a difficult problem to realize the data synchronization at the sending and receiving ends. [0003] The existing continuous variable quantum key distribution data synchronization technology is to ins...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08
CPCH04L9/0852
Inventor 喻松郭弘赵一甲王翔宇张一辰
Owner BEIJING UNIV OF POSTS & TELECOMM