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A Prediction Method of Key Parameters in Space Chaos Laser Communication System

A chaotic laser and communication system technology, applied in the field of laser communication, can solve time-consuming and resource-consuming problems, save time and resources, save offline debugging, and display intuitive results

Active Publication Date: 2021-05-28
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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  • A Prediction Method of Key Parameters in Space Chaos Laser Communication System
  • A Prediction Method of Key Parameters in Space Chaos Laser Communication System
  • A Prediction Method of Key Parameters in Space Chaos 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 cover ratio, emitted light power and mismatch magnitude in a space chaotic laser communication system. At present, the setting of key parameters such as cover ratio, emitted optical power, and mismatch magnitude in the space chaotic laser communication system is mainly estimated through experiments, but due to the mutual influence of parameters, the method of estimating parameters through experiments involves a lot of repetition. The operation consumes a lot of time and resources. In order to efficiently estimate the key parameters such as cover ratio, transmitted optical power and mismatch magnitude in the spatial chaos laser communication system, we propose a simulation estimation method. The method is simple, quick, low-cost, does not require repeated experimental operations, and can intuitively see the relationship between parameters.

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 Patents(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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