Satellite-ground quantum key distribution simulation system based on STK and MATLAB

Abstract

The invention discloses a satellite-ground quantum key distribution simulation system based on STK and MATLAB, and the system comprises two submodules which cooperate in sequence: a satellite and ground station parameter submodule and a quantum key distribution protocol submodule in an atmospheric environment. The satellite and ground station parameter sub-module is used for completing simulationof a satellite-ground physical link of satellite-ground free space quantum key distribution; and the quantum key distribution protocol sub-module in the atmospheric environment is used for completingsimulation of satellite-ground free space quantum key distribution. According to the method, a free space quantum key distribution simulation system based on the Mink sub-number is constructed throughMATLAB and STK, the link real-time attenuation condition and the channel asymmetry degree are visualized, and the key generation rate under the parameter configuration condition based on quantum keydistribution is obtained.

Description

technical field [0001] The invention belongs to the technical field of quantum information processing, and relates to a star-earth quantum key distribution simulation system based on STK and MATLAB. Background technique [0002] At present, the research on free-space quantum key distribution is still limited to the experimental exploration on the star-earth platform. Compared with the optical fiber quantum key distribution system with relatively stable channel state, the free-space quantum key distribution channel is dynamically open and lacks effective Active monitoring and other means monitor the channel, so the actual security analysis of fiber channel quantum key distribution cannot be simply transplanted to the free space quantum key distribution platform. In addition, the satellite carrier's orbit selection, communication link Loss compensation and optimization of core device parameters will also affect the performance and actual security of free-space quantum key dist...

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Problems solved by technology

[0002] At present, the research on free-space quantum key distribution is still limited to the experimental exploration on the star-earth platform. Compared with the optical fiber quantum key distribution system with relatively stable channel state, the free-space quantum key distribution channel is dynamically open and lacks effective Active monitoring and other means monitor the channel, so the actual security analysis of fiber channel quantum key distribution cannot be simply transplanted to the free space quantum key distribution platform. In addition, the satellite carrier's orbit selection, communication link Loss compensation and optimization of core device parameters will also affect the performance and actual security of free-space quantum key distribution

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