Satellite laser communication subsystem communication rate adaptive control method and system

An adaptive control and laser communication technology, applied in the field of laser communication, can solve problems such as low uplink data rate, achieve the effects of uncomplicated structure, low data rate improvement and low price

Active Publication Date: 2018-12-11
SHANGHAI SATELLITE ENG INST
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Problems solved by technology

[0005] At present, the downlink transmission of data on the satellite is mainly used in the satellite-ground laser com...

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  • Satellite laser communication subsystem communication rate adaptive control method and system
  • Satellite laser communication subsystem communication rate adaptive control method and system

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Embodiment Construction

[0023] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] In the existing satellite-to-earth laser communication system, due to the limited transmission power, we often adopt the method of reducing the data rate to improve the communication quality, and because of the traditional communication system design scheme, the communication data rate is often a fixed value. With the increasing demand for the communication data rate of the uplink, improving the communication data rate is currently a major research focus of satellite laser communication. Due to different atmospheric conditions, the atmospheric loss value of the communication link is different. When the atmospheric condition is good, the loss of the communication link is relatively low. Under the same transmission power, the bit error rate can be appropriately increased, so that the power of a single symbol remains the same. Within th...

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Abstract

The invention discloses a communication rate adaptive control method and a system of a satellite laser communication subsystem. The system comprises a ground pulse light emitting module, a backward light detecting module, a data processing and feedback module. The ground pulsed light emitting module comprises a pulsed laser emitter and an erbium doped fiber amplifier which are non-signal light andonly serve as a test light path to detect atmospheric loss. The backward light detection module comprises a detector and a data acquisition card. When the emitted laser pulse is transmitted in a freechannel, the detector detects backward scattered light of the emitted pulse light, and the power of the backward scattered light detected by the detector is collected in real time by the data acquisition card. The data processing and feedback module is a computer. The invention can simply and quickly realize the self-adaptive adjustment of the communication rate of the satellite laser communication subsystem and improve the data rate of the current satellite laser communication system.

Description

technical field [0001] The invention belongs to the field of laser communication, and in particular relates to a communication rate adaptive control method and system of a satellite laser communication subsystem. Background technique [0002] Satellite laser communication technology has the advantages of large communication capacity, small terminal size and good confidentiality. Compared with traditional microwave communication technology, laser communication technology can achieve a data transmission capability of several gigabits to tens of gigabits per second under the conditions of satellite volume, weight and output power. A typical satellite-to-ground laser communication communication link generally includes three parts: optical tracking subsystem, communication subsystem and transmission channel. In the sending and receiving part, there are mainly indicators such as the form of telescope sending and receiving, telescope multiple, transmitting power and receiving sens...

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Application Information

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IPC IPC(8): H04B7/185H04B10/079H04B10/50
CPCH04B7/1851H04B10/07955H04B10/0799H04B10/503
Inventor 李鑫陈媛李密赵强
Owner SHANGHAI SATELLITE ENG INST
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