Dual-spot interpretation and tracking method for one-to-many simultaneous laser communication among satellites

A laser communication and dual-spot technology, applied in the information field, can solve the problem that the double-spot cannot be tracked normally

A laser communication and dual-spot technology, applied in the information field, can solve the problem that the double-spot cannot be tracked normally

CN110440913AInactive Publication Date: 2019-11-12CHANGCHUN UNIV OF SCI & TECH
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  • Dual-spot interpretation and tracking method for one-to-many simultaneous laser communication among satellites

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Experimental program
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Embodiment Construction

[0018] Taking the one-to-two simultaneous laser communication between a certain satellite as an example, the system is composed of three reflector components, and the circumference is evenly distributed on the optical antenna. Each component can achieve a working range of ±65° in azimuth and ±8° in pitch, the working overlap angle between adjacent mirror components in the azimuth direction is 5°, the tracking accuracy requirement is 200μrad, and the energy change preset threshold for judging whether there is a double spot Set to 20%, the handover off-target threshold was 100 μrad.

[0019] The system composition and implementation steps are as follows:

[0020] Step 1. After the mirror assembly 1 finishes capturing the target, the tracking detector 5 receives the reflected target laser light, and the tracking detector 5 measures the position and energy of the light spot. At this time, the system works in the single-mirror mode. The mirror assembly 1 rotates according to the p...

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Abstract

The invention relates to a dual-spot interpretation and tracking method for one-to-many simultaneous laser communication among satellites, and belongs to the technical field of information. The invention relates to the dual-spot interpretation and tracking method for the one-to-many simultaneous laser communication among the satellites. The characteristic of the method is that reflecting mirror tracking control is divided into single-mirror tracking and a double-mirror linkage mode. A tracking detector has the ability of energy detection and spot position extraction and can determine whether double spots are present. The problem that the reflecting mirror cannot be controlled due to the influence of the double spots during the double-mirror linkage by trajectory prediction open-loop follow-up combined with closed-loop tracking, and a system can complete the function of single-reflecting mirror tracking. The method is used to solve the problem that when two reflecting mirrors track thesame target, the double spots appear in the detector and a conventional tracking method cannot determine a corresponding relationship between the two spots and the two reflecting mirrors and cannot track, and so a spaceborne one-to-many laser communication system can control multiple reflecting mirrors to track the target.

Description

technical field [0001] The invention relates to a double-spot interpretation and tracking method for one-to-many simultaneous laser communication between satellites, which belongs to the field of information technology. Background technique [0002] Laser communication has the advantages of high communication rate, good confidentiality, and strong anti-interference ability, and has been widely valued in military applications to achieve anti-interference, fast, and confidential transmission of military information. With the continuous development of space information network and the continuous application of space satellite groups, the demand for space laser network communication is urgent, and communication terminals are required to have the ability to communicate with multiple points simultaneously. In a one-to-many simultaneous laser communication system using multiple mirrors, the laser communication terminal installs multiple independently working two-dimensional mirror ...

Claims

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Application Information

Patent Timeline
12 Nov 2019
Publication
CN110440913A
IPC
G01J1/10; H04B10/11; H04B10/118
CPC
G01J1/10; H04B10/11; H04B10/118
Inventors
李小明; 陶宗慧