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Quaternary light polarization encoding and self-calibration wireless optical communication system and method

A wireless optical communication, quaternary technology, applied in the field of optical communication transmission

Active Publication Date: 2014-12-31
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a wireless optical communication method and system with quaternary optical polarization encoding and self-calibration, so as to solve the existing Problems in wireless optical communication technology: optical rotation modulation can only be applied to binary systems, and multi-ary systems will be affected by polarization axis alignment problems, resulting in distortion of received signals and making accurate judgments impossible

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  • Quaternary light polarization encoding and self-calibration wireless optical communication system and method

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[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] Please refer to the attached figure 1 to attach image 3 , The present invention provides a wireless optical communication method and system for quaternary optical polarization encoding and self-calibration.

[0033] as attached figure 1 As shown, the quaternary optical polarization coding and self-calibration wireless optical communication system includes a quaternary modulation component 10 , a polarization modulation device 20 , a polarization axis correction component 30 , and a polarization modulation signal receiving device 40 . Wherein the quaternary modulation component 10 processes the original signal and generates a modulation level, the polarization modulation device 20 generates a modulation signal and sends it, the signal is transmitted through an atmospheric channel, and is received and sent by the polarization modulati...

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Abstract

The invention provides a quaternary light polarization encoding and self-calibration wireless optical communication system. The transmitting end of the system is used for sending a quaternary polarization shift keying modulation signal by a quaternary modulation assembly, and the receiving end of the system is used for performing adaptive correction on the polarization of a polarization shaft by a polarization shaft correction assembly. The invention also discloses a quaternary light polarization encoding and self-calibration wireless optical communication method. The system and the method have the advantages that the received error signal is processed to obtain the correction angle of the polarization shaft, and the receiving end is controlled to automatically adjust, so the judgment accuracy is improved; by utilizing a quaternary polarization shift keying modulation technology, the communication rate is increased.

Description

technical field [0001] The invention relates to the field of optical communication transmission, in particular to a free space optical communication transmission method and system. Background technique [0002] Wireless optical communication is the product of the combination of optical communication and wireless communication technology. Compared with traditional radio communication, wireless optical communication technology does not occupy valuable radio frequency resources; it has good electromagnetic compatibility, strong anti-electromagnetic interference ability, and good confidentiality; Small size, low power consumption, light weight, large information capacity, low cost of network construction and maintenance, fast establishment speed, and mobility. Restricted by weather conditions and other conditions, the performance of traditional amplitude modulation is not good. Polarization shift keying is an emerging modulation technology used in wireless optical communication....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/532H04B10/60
Inventor 姚勇张碧仑赵宇峰王宗兴杨彦甫
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL