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Satellite-ground QKD downlink transmission layering model

A layered model, troposphere technology, applied in the field of communication, to achieve the effect of accurate performance simulation results

Pending Publication Date: 2021-12-17
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Optical fiber quantum communication is limited by terrain, limited by a single transmission distance of only about 100 kilometers, etc., so it is not enough to use optical fiber quantum communication to build a global quantum communication network.

Method used

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  • Satellite-ground QKD downlink transmission layering model
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  • Satellite-ground QKD downlink transmission layering model

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Embodiment Construction

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples of the description. It should be understood that the specific examples described here are only used to explain the present invention, not to limit the present invention.

[0016] Concrete method step of the present invention is as follows:

[0017] (1) Establish a hierarchical model of satellite-ground QKD downlink transmission.

[0018] Since the temperature and pressure in the actual atmosphere change with the altitude, the refractive index also changes accordingly, so the actual path of the signal light from the satellite to the ground receiver should be curved, such as figure 1 Medium OQ 1 Q 2 …Q N S is shown by the curve with the arrow. In this case, the signal from the satellite arrives at the apparent zenith angle ξ a Below, not below the true zenith angle ξ. we use figure 1 The hierarchical model of satellite-to-ground QKD downlink t...

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Abstract

The invention is suitable for satellite-ground quantum key distribution, and provides a satellite-ground QKD downlink transmission layering model. According to the method, the existence of the atmospheric refraction effect is considered, under the model, the influence of atmospheric refraction on the link distance is considered, the troposphere and the stratosphere of the atmospheric layer are layered, the link distance of each layer is calculated in detail, and finally the overall link distance after atmospheric refraction is obtained. According to the method, the actual situation of current satellite-ground quantum key distribution signal transmission is fully considered, and a certain reference is provided for the design of an actual satellite-ground quantum key distribution system.

Description

technical field [0001] The invention relates to the communication field, in particular to a layered model of satellite-earth QKD downlink transmission. Background technique [0002] Quantum key distribution (QKD) emerged in the 1980s, and its security is guaranteed by the quantum non-cloning principle and the uncertainty principle. Optical fiber quantum communication is limited by terrain, limited by a single transmission distance of only about 100 kilometers, etc., so it is not enough to use optical fiber quantum communication to build a global quantum communication network. Satellite quantum communication technology uses satellites to establish a communication network with the ground, which can realize quantum communication on a global scale. [0003] The establishment of satellite-mediated quantum links is a difficult task. Low Earth orbit has the advantages of low optical loss, low cost, and easy operation, so it has become the first choice for many existing planet-to-e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70H04B10/073
CPCH04L9/0852H04B10/70H04B10/073Y02D30/70
Inventor 刘涛李佳佳邱佳王思佳刘舒宇
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)