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Method for estimating covering ratio, transmitting optical power and mismatch magnitude in space chaotic laser communication system

A chaotic laser and communication system technology, applied in the field of laser communication, can solve the problem of time-consuming and resource-consuming

Active Publication Date: 2020-10-09
NANJING UNIV
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Problems solved by technology

When designing a space chaotic laser security communication system, the common method is to determine the set values ​​of these parameters through repeated experimental tests, which consumes a lot of time and resources

Method used

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  • Method for estimating covering ratio, transmitting optical power and mismatch magnitude in space chaotic laser communication system
  • Method for estimating covering ratio, transmitting optical power and mismatch magnitude in space chaotic laser communication system

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Embodiment Construction

[0059] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The implementations described with reference to the accompanying drawings are exemplary and are only used to explain the present invention rather than to limit the present invention.

[0060] figure 1 It is the classical space chaos laser communication system used in the present invention. The system is divided into two parts, the sending end and the receiving end. The transmitting end is composed of laser, Mach-Zehnder modulator, fiber delay line, optical coupler, photodetector, radio frequency amplifier and erbium-doped fiber amplifier, among which Mach-Zehnder modulator, fiber delay line, photodetector and radio frequency amplifier are composed The feedback loop is the key structure of chaos generation; the receiving end contains a feedback loop similar to the sending end, which is used to generate chaotic carrier. There is a phase offs...

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Abstract

The invention discloses a method for estimating the covering ratio, the transmitting optical power and the mismatch magnitude in a space chaotic laser communication system. At present, setting of keyparameters such as a covering ratio, transmitting light power and a mismatch magnitude in a space chaotic laser communication system is mainly estimated through experiments, but due to mutual influence among the parameters, a method for estimating the parameters through the experiments requires a large amount of repeated operation so that a large amount of time and resources are consumed. The invention provides a simulation estimation method in order to efficiently estimate key parameters such as the covering ratio, the transmitting optical power and the mismatch magnitude in the space chaoticlaser communication system. The method is simple, quick and low in cost, repeated experimental operation is not needed, and the relation between the parameters can be visually seen.

Description

technical field [0001] The invention belongs to the field of laser communication, and relates to a method for estimating cover ratio, emitted light power and mismatch magnitude in a space chaotic laser communication system. Background technique [0002] Space laser communication technology is an important direction of future space communication technology. Compared with traditional microwave communication, it has the advantages of large communication capacity and small terminal size. Therefore, the research on its system characteristics has increasingly become a hot spot in this field. However, due to the long distance of space communication and the large radius of the light spot, it provides opportunities for eavesdroppers to steal information at the transmitting end, receiving end and atmospheric channel. Applying chaos technology to space laser communication can realize high data rate secure communication on the basis of the existing space laser communication system. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/112H04L9/00H04L12/24H04L12/26
CPCH04B10/112H04L9/001H04L41/145H04L43/0847H04L43/50
Inventor 李密曾慧慧李子焯李佳翰陈向飞
Owner NANJING UNIV
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