Wavelength diversity device and method for suppressing scintillation in reverse modulation wireless optical communication

A technology of wireless optical communication and reverse modulation, which is applied in the field of communication to achieve the effects of enhancing communication reliability, enhancing reliability and increasing aperture area

Active Publication Date: 2022-06-17
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This detection mode is simple, modular and inexpensive, but it is only suitable for low-speed reverse modulation optical communication

Method used

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  • Wavelength diversity device and method for suppressing scintillation in reverse modulation wireless optical communication
  • Wavelength diversity device and method for suppressing scintillation in reverse modulation wireless optical communication
  • Wavelength diversity device and method for suppressing scintillation in reverse modulation wireless optical communication

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Embodiment 1

[0037] figure 2 This is a schematic diagram of an atmospheric scintillation device in wireless optical communication based on wavelength diversity suppression reverse modulation according to an embodiment of the present invention. like figure 2 As shown in the figure, the atmospheric scintillation device in wireless optical communication based on wavelength diversity suppression reverse modulation includes an inquiry terminal and a reverse modulation terminal, wherein the inquiry terminal includes: a laser module 1, a wavelength division multiplexer 2, a half mirror half mirror 3, and a collimating lens 4. The wavelength demultiplexer 8 , the photodetector module 9 , the amplification module 10 , the sampling module 11 , and the signal processing module 12 ;

[0038] At the interrogation end, M beams of laser light of different wavelengths generated by the laser module 1 pass through the wavelength division multiplexer 2, and then the M beams of optical signals are synthesi...

Embodiment 2

[0041] The present invention implements the reverse modulation wireless optical communication method based on wavelength diversity, and the implementation steps of a specific example are as follows:

[0042] Step 1: The communication is initiated by the inquiry terminal. The laser module 1 generates M beams of lasers with similar wavelengths and passes through the wavelength division multiplexer 2. The optical signals are synthesized into one beam and output by the signal transmission fiber. The straight lens 4 is sent after beam shaping, and is transmitted to the port of the reverse modulation end in the atmospheric channel.

[0043] Step 2: At the reverse modulation end, the laser light transmitted through the atmosphere is focused on the modulator 6 through the focusing lens 5, and the driver 7 drives the modulator 6 to work according to the input signal, and loads the input signal onto the original unmodulated optical signal to form At the same time, the modulator 6 reflec...

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Abstract

The invention provides a device for suppressing atmospheric scintillation in reverse modulation wireless optical communication based on wavelength diversity, which includes an inquiry end and a reverse modulation end that realize communication transmission in an atmospheric channel; the inquiry end includes an optical signal generator, and an optical signal generator connected to the A lens shaping mechanism, a wave division multiplexer, a photoelectric conversion mechanism, and a signal processing module connected to the lens shaping mechanism; the reverse modulation end includes a focusing lens connected to each other, a modulator, and a driver that provides an input signal to the modulator; and the focusing The lens corresponds to the lens shaping mechanism. The invention discloses a device and method for suppressing atmospheric scintillation in reverse modulation wireless optical communication based on wavelength diversity.

Description

technical field [0001] The invention relates to the field of communications, in particular to a device and method for suppressing atmospheric scintillation in reverse modulation wireless optical communication based on wavelength diversity. Background technique [0002] Wireless optical communication can be divided into indoor and outdoor optical communication. Outdoor wireless optical communication, also known as Free Space Optical Communication (FSO), is a communication method that transmits information through lasers in free space channels such as the atmosphere. The installation cost of wireless optical communication is relatively low, and frequency allocation and licensing are not required. A free space optical communication system generally consists of two terminals, an optical transmitter and an optical receiver. In order to ensure that the optical signal can reach the receiving end from the transmitting end and realize point-to-point communication, both ends of the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/071H04B10/11H04B10/2575H04B10/50H04B10/572H04J14/02
CPCH04B10/071H04B10/11H04B10/25752H04B10/503H04B10/572H04J14/0202
Inventor 韦玮鲍云月
Owner NANJING UNIV OF POSTS & TELECOMM
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