Intelligent bidirectional visible light communication system suitable for various water qualities

A visible light communication and water quality technology, which is applied in transmission systems, short-distance systems, electromagnetic wave transmission systems, etc., can solve problems such as not considering the influence of optical signals, and achieve the effect of improving system stability and avoiding crosstalk

Inactive Publication Date: 2019-08-23
SUN YAT SEN UNIV
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Problems solved by technology

[0004] However, although there are many studies on underwater visible light communication systems, most of them use commercial detectors as the receiving end of the system, and the research fo

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  • Intelligent bidirectional visible light communication system suitable for various water qualities
  • Intelligent bidirectional visible light communication system suitable for various water qualities
  • Intelligent bidirectional visible light communication system suitable for various water qualities

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Embodiment Construction

[0025] The accompanying drawings are for illustrative purposes only, and should not be construed as limiting the present invention; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as limiting the present invention.

[0026] Such as figure 1 As shown, an intelligent two-way visible light communication system for various water qualities includes three or more sets of two-way visible light communication channels, and each set of channels includes an uplink and a downlink. Among them, each channel corresponds to I, I A , I B A water quality environment in Class II, Class III sea water, it is...

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Abstract

The invention relates to an intelligent bidirectional visible light communication system suitable for various water qualities. The system at least comprises three groups of two-way visible light communication channels, e. Each group of channels comprises an uplink and a downlink, and each group of channels at least corresponds to one water quality environment in one type of sea water body; whereinthe peak wavelength of light carriers used by each group of channels is in a light wavelength range with the lowest total attenuation coefficient of one of I-type seawater, IA-type seawater, IB-typeseawater, II-type seawater and III-type seawater, and the interval of the peak wavelengths used by the channels is not less than 20 nanometers; the modulation signal is coupled to an emission light source LED after passing through a power amplifier and a bias tree, the water quality type is judged according to the advantages and disadvantages of signals received by the same-end link, and corresponding uplink and downlink groups are selected; and the LED of the detector at the receiving end converts the optical signal into an electric signal which passes through the filtering module and the high-linearity amplifier, and visible light bidirectional communication is completed through final signal demodulation. Appropriate channels can be intelligently selected for communication according to different seawater qualities so as to adapt to different working environments.

Description

technical field [0001] The present invention relates to the technical field of seawater and underwater wireless optical communication, and more specifically, relates to an intelligent two-way visible light communication system applicable to various water qualities. Background technique [0002] The ocean occupies more than 70% of the earth's surface area. The ocean not only contains abundant resources, but also has a major impact on global climate change, human economic and social development. For example, the global greenhouse effect, the origin of life on earth, new resources, new energy, new biological genes, human living environment and sustainable development of society, etc. Although humans have been exploring the ocean since ancient times, so far, humans have very limited understanding of most of the ocean. The existing underwater communication technologies mainly include: long-wave radio transmission in the ultra-low frequency range. Due to its low communication rat...

Claims

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Application Information

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IPC IPC(8): H04B10/114H04B10/116
CPCH04B10/1143H04B10/116
Inventor 刘立林操琴赖远佳张紫莹
Owner SUN YAT SEN UNIV
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