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Light and small airborne high-speed laser communication method

A technology of laser communication and minicomputer, which is applied in the field of laser communication, can solve the problems that cannot meet the transmission rate and hinder the development of modern informatization, and achieve the effect of strong anti-interference ability and high transmission rate

Pending Publication Date: 2020-05-12
TIANJIN JINHANG INST OF TECH PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the communication rate of the current radio frequency communication is close to the theoretical limit and cannot meet the requirements of the transmission rate. Therefore, expedient measures such as data compression (affecting resolution) or mass storage (affecting coverage) have to be adopted, which hinders the development of modern informatization.

Method used

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  • Light and small airborne high-speed laser communication method
  • Light and small airborne high-speed laser communication method
  • Light and small airborne high-speed laser communication method

Examples

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Embodiment 1

[0051] In this embodiment, a set of light and small airborne high-speed laser communication system such as figure 2As shown, it includes optical system, laser emitting system, laser receiving system, rough and fine tracking system, and master control system.

[0052] The optical subsystem is mainly composed of a Cassegrain telescope, a laser shaping and beam expanding mirror, a dichroic mirror, an optical filter, and a reflecting mirror. out, and then focus the laser signal after spatial transmission onto the photosensitive surface of the photodetector. At the same time, since the sending and receiving share the Cassegrain telescope, in the system, the emitted laser and the laser are separated and separated by dichroic mirrors and filters to eliminate stray light.

[0053] The emission subsystem is mainly composed of a laser, a modulator, a laser driver, a modulator driver, and a temperature control circuit. The function of the laser transmitting subsystem is to modulate th...

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Abstract

The invention belongs to the technical field of laser communication, and particularly relates to a light and small airborne high-speed laser communication method. The method comprises the steps that 1, initial alignment is conducted between an airborne terminal and a foundation terminal; 2, open-loop capture is performed between the airborne terminal and the foundation terminal; 3, coarse trackingis carried out between the airborne terminal and the foundation terminal; 4, fine tracking is carried out between the airborne terminal and the foundation terminal, and a communication link is established; and step 5, two-way communication is realized between the airborne terminal and the foundation terminal. The method innovatively adopts an asymmetric single beacon and a rapid capture, alignment and tracking technology and has the advantages of miniaturization, high transmission rate and high anti-interference capability.

Description

technical field [0001] The invention belongs to the technical field of laser communication, and in particular relates to a light and small airborne high-speed laser communication method. Background technique [0002] As the payloads carried by each platform are gradually developing towards high-resolution and wide-spectrum, the demand for real-time transmission of massive data is becoming more and more urgent. For example, in a high-resolution and wide-spectrum visible light remote sensing system, if the frame The resolution is 10bits, and the spatial resolution is 4096 × 4096. Without any compression and encoding, its original data rate is 1.68Gbps, and the real-time transmission communication rate is required to be greater than 2Gbps. If the frame rate and grayscale resolution If the rate and spatial resolution continue to increase, or the fusion of multi-sensor data, a higher communication rate is required. However, the communication rate of the current radio frequency c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/11H04B10/40H04B10/50H04B10/66H04B10/67
CPCH04B10/11H04B10/40H04B10/503H04B10/66H04B10/67
Inventor 韦晓莹贾晓东吴环宝王天鹤刘建辉王姝瑶
Owner TIANJIN JINHANG INST OF TECH PHYSICS
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