Laboratory simulation method of atmospheric influence on wireless laser communication

A laboratory simulation, wireless laser technology, applied in the field of laboratory simulation of the influence of the atmosphere on wireless laser communication, can solve problems such as difficulty in accurately simulating the internal and external scales of atmospheric turbulence and wind speed parameters

Inactive Publication Date: 2013-02-20
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

The hardware-in-the-loop simulation method is limited by physical conditions, and it is difficult to accurately simulate the given internal and external scales of atmospheric turbulence and wind speed parameters.

Method used

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  • Laboratory simulation method of atmospheric influence on wireless laser communication
  • Laboratory simulation method of atmospheric influence on wireless laser communication

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings. In this embodiment, the electro-optic modulator is an intensity electro-optic modulator. In the numerical simulation of laser atmospheric turbulence transmission, Δt=1 / 16×Greenwood time constant. For the actual electro-optic modulator, limited by the characteristics of the crystal material object, usually, the maximum light transmittance of the electro-optic modulator is less than 1. Assuming that the maximum light transmittance of the electro-optic modulator 104 obtained through experimental measurement is T max , then the ratio of the received optical signal power of the wireless laser communication link that the electro-optic modulator 104 can simulate to the transmitted optical power of the laser transmitting end does not exceed T max The ratio to the light transmittance of the optical lens group 102. The ratio of the power of the received optical signal to the tr...

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Abstract

The invention discloses a laboratory simulation method of atmospheric influence on wireless laser communication, belonging to the technical field of atmosphere channel wireless laser communication. According to the laboratory simulation method, through MODTRAN software and a laser atmospheric turbulence transmission numerical simulation method based on a random phase screen, laser atmospheric transmission transmittance and time-domain fluctuation data during optical signal receiving are calculated, thus generating a drive control signal of an electro-optical modulator so as to simulate atmospheric influence. Compared with the existing semi-physical atmospheric influence simulation method, the laboratory simulation method can accurately simulate the influence of beam wandering caused by atmospheric turbulence on wireless laser communication.

Description

technical field [0001] The invention belongs to the technical field of atmospheric channel wireless laser communication, and relates to a laboratory simulation method for the influence of the atmosphere on wireless laser communication. Background technique [0002] In recent years, wireless laser communication has attracted widespread attention. When the wireless laser communication system works in the earth's atmosphere, the absorption and scattering of the atmosphere will cause the power of the laser signal to attenuate, and the atmospheric turbulence will cause the intensity flickering and beam drift of the laser signal, which will seriously degrade the performance of the communication system. Atmospheric effects ultimately appear as random fluctuations in the strength of the optical signal received by the laser communication receiver. In the intensity modulation / direct detection laser communication system, the threshold value judgment method is used to realize data dete...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/07H04B10/11H04B17/00H04B17/391
Inventor 陈纯毅杨华民蒋振刚范静涛娄岩
Owner CHANGCHUN UNIV OF SCI & TECH
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