Trapping system for satellite laser communication

A laser communication and terminal technology, applied in the field of capture systems, can solve problems such as long capture time and missed scans, and achieve the effects of simplifying the capture process, shortening the capture time, and increasing the probability of successful capture

Inactive Publication Date: 2011-07-27
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme is currently the most widely used method in the world. The disadvantage is that the capture time is longer (such as 3 minutes). In addition, due to the vibration of the satellite platform, the relative motion between satellites and the mechanical noise of the communication terminal itself, etc. Influenced by the sub-area scan, there is a probability of missed scan

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  • Trapping system for satellite laser communication
  • Trapping system for satellite laser communication
  • Trapping system for satellite laser communication

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Embodiment Construction

[0020] The satellite laser communication terminal consists of optical antenna and mechanical drive, precise aiming mirror, filter components with switchable passband and bandwidth, focusing optical path with variable focal length, capture sensor with variable frame rate and high-speed data processing circuit, shutter, communication Receiving module, beacon optical module, communication optical emission module and advanced aiming module, precise aiming sensor module, optical backplane, several light splitting elements, interface between each module and central processing unit, central processing unit, and central processing unit and satellite The interface of the platform and so on. Among them, the capture system of the satellite laser communication terminal is mainly used for the large field of view optical signal reception in the capture stage, and is also used in the tracking stage of satellite laser communication, including filter components with switchable passband bandwidt...

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Abstract

The capture system includes frame frequency variable capture sensor, focus variable focusing optical path, and bandwidth of pass band switchable filtering part. When the terminal device carries out capturing planets, the system is under following states: the sensor and processing circuit are in state of low frame frequency; focusing optical path is adjusted at state of short focus; the filtering part is in state of capturing planets of wide bandwidth. After gesture data of the terminal device are obtained, the system is under following states: the sensor and processing circuit are in state ofhigh frame frequency; focusing optical path is adjusted to long focus; the filtering part is in state of narrow bandwidth. Thus, the terminal device enters to satellite laser communication state. Syncretizing function of star sensor, the system can accomplish capture procedure between communication terminal devices without need of scanning.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and in particular relates to a capture system of a satellite laser communication terminal. Background technique [0002] Compared with traditional RF communication technology, satellite laser communication has the advantages of high data rate, good confidentiality, small size, light weight, and low power consumption. Countries all over the world have launched a lot of research work. At present, the SILEX system developed by the European Space Agency has been successfully tested in space. The system includes two flight-level space optical communication terminals. The structure of the satellite laser communication system is as follows: figure 1 As shown, the working process is as follows: in the satellite laser communication acquisition stage, the beacon light module of the active end machine sends out the beacon light, and scans the uncertain range of the opponent’s satellite under...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/105H04B10/118
Inventor 王建民孙东喜秦谊
Owner PEKING UNIV
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