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A Compensation Method for Atmospheric Turbulence Misfit in Space Chaotic Laser Security Communication System

An atmospheric turbulence and chaotic laser technology, applied in the field of laser communication, can solve problems such as jitter spot energy and random changes, achieve the effects of compensation for mismatch, improvement of communication quality, and low cost

Active Publication Date: 2021-06-22
NANJING UNIV
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Problems solved by technology

[0006] Purpose of the invention: In view of the above problems, the present invention provides a high-precision atmospheric turbulence mismatch compensation method in a space chaotic laser security communication system. The existing space chaotic laser communication system will be affected by the atmospheric effect during operation, and the atmospheric effect causes the laser beam to Scattering and absorption, jitter occurs during transmission and received spot energy varies randomly

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  • A Compensation Method for Atmospheric Turbulence Misfit in Space Chaotic Laser Security Communication System
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  • A Compensation Method for Atmospheric Turbulence Misfit in Space Chaotic Laser Security Communication System

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[0045] The technical solutions of the present invention will be described in further 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.

[0046] The invention uses the optical tracking and aiming system as a calibration source, and converts the influence of the atmospheric turbulence on the beacon light into the influence on the signal carrier to achieve the effect of compensating the mismatch caused by the atmospheric turbulence.

[0047] figure 1 It is a system structure diagram of the present invention, a high-precision atmospheric turbulence mismatch compensation method in a space chaotic laser security communication system. The satellite is the transmitting end, and the signal is sent from the satellite. After passing through the atmospheric link, it reaches the receiving terminal ere...

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Abstract

The invention discloses a high-precision atmospheric turbulence mismatch compensation method in a space chaotic laser security communication system. At present, the downlink of the space chaotic laser communication system will be affected by the flickering effect of light intensity caused by atmospheric turbulence, resulting in signal loss between the receiving end and the transmitting end. If it is not matched, the signal quality will deteriorate and serious bit errors will occur. In order to compensate the mismatch caused by the flickering effect of light intensity, improve the anti-atmospheric interference ability of the communication system, and reduce the bit error rate of the system, the present invention proposes a laser signal emitted by the existing optical tracking system in the system as a reference , a method for mismatch compensation. This method does not require an additional launch of on-board terminals, and requires fewer components for compensation, which can meet the needs of satellite miniaturization, and the cost is relatively low.

Description

technical field [0001] The invention relates to the field of laser communication, in particular to a compensation method for atmospheric turbulence mismatch in a space chaotic laser security communication system. Background technique [0002] Chaos laser has basic characteristics such as initial value sensitivity, high complexity, and no periodicity, which can well realize high-secret information transmission. Applying it to satellite laser communication can realize high-capacity secure communication, making space chaotic Laser communication technology has attractive application prospects, and it has become an important direction in the field of satellite communication for the characteristics and realization of the system. [0003] In the downlink of the space chaos laser communication system, the signal is sent by the transmitter on the star, transmitted in the atmospheric channel, and the terminal installed on the ground receives the optical signal and demodulates the tran...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/112H04B10/291H04B10/50H04L9/00
CPCH04B10/112H04B10/2912H04B10/505H04L9/001
Inventor 李密李文琛杨宇帆孙训李佳翰陈向飞
Owner NANJING UNIV
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