Transmission method for continuous variable quantum key distribution

• Main Authors: DOU YIN, ZHANG MEIXIANG, HUANG YUTING
• Format: Patent
• Language: Chinese; English
• Published: 05.01.2021
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention discloses a transmission method for continuous variable quantum key distribution. The transmission method comprises the steps that a sending end and a receiving end share coherent stateinformation; a reverse coordination framework is used; original secret key information is generated by a receiving end, coded and modulated; each d bit of the modulated information forms a set of vectors, d-dimensional mapping processing is conducted on the vectors and normalized coherent state information, and the mapping relation between the two is obtained; the sending end calculates information according to the mapping relationship between the two transmitted by the receiving end and the decoding parameter of the channel error correction code; a virtual channel is built according to the vector and the information, and a channel log-likelihood ratio corresponding to the information is calculated by the sending end; the channel log-likelihood ratio is sent to an SC decoder to obtain decoded information. The meth