Underwater visible light communication method, device and system

A visible light communication and visible light technology, applied in the field of communication, can solve the problems of SPAD performance degradation, damage to SPAD devices, low practicability and flexibility, etc., and achieve the effect of improving practicability and flexibility

Active Publication Date: 2017-01-11
THE PLA INFORMATION ENG UNIV
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Problems solved by technology

[0004] However, SPAD is greatly affected by the dead time effect and the maximum number of photons received. When the transmission distance is short or the light intensity is high, the performance of SPAD will decrease, and the SPAD device may be damaged; In this mode, the detected light intensity and distance are l

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  • Underwater visible light communication method, device and system
  • Underwater visible light communication method, device and system

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[0036] The invention provides an underwater visible light communication method, and an underwater visible light communication device and system, which can improve the practicability and flexibility of underwater visible light communication.

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0038] See figure 1 , figure 1 It is a schematic flowchart of the underwater visible light communication method provided by the first specific embodiment of the present invention.

[0039] The underwate...

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Abstract

The invention provides an underwater visible light communication method, device and system. The underwater visible light communication method comprises the steps of when an APD (Avalanche Photo Diode) receiving terminal is used to receive visible light information transmitted by a transmitting terminal of a visible light communication system, judging whether a bit error rate of the APD receiving terminal is lower than a preset threshold or not; if the bit error rate is lower than the threshold, switching to use an SPAD (Single-photon Avalanche Photo Diode) to receive the visible light information transmitted by the transmitting terminal of the visible light communication system; when the SPAD receiving terminal is used to receive the visible light information transmitted by the transmitting terminal of the visible light communication system, judging whether the number of photons detected by the SPAD receiving terminal per second reaches a preset maximum number of photons or not; if the number of photons detected by the SPAD receiving terminal per second reaches the maximum number of photons, switching to use the APD receiving terminal to receive the visible light information transmitted by the transmitting terminal of the visible light communication system. According to the invention, advantages of an APD and advantages of an SPAD can be combined, disadvantages of the APD and disadvantages of the SPAD are avoided, and the practicability and the flexibility of visible light communication performed underwater are improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an underwater visible light communication method, device and system. Background technique [0002] Since the attenuation of blue-green light by seawater is much smaller than the attenuation of light in other bands, it is possible to use blue-green light for underwater optical communication. [0003] Usually, in an underwater visible light communication system, the receiving end uses an avalanche photodiode APD or a single photon avalanche diode SPAD to receive visible light information. In a short-distance visible light communication system, the receiving end usually uses an APD, and in a medium-to-long-distance visible light communication system, the receiving end usually uses a SAPD with higher detection sensitivity. [0004] However, SPAD is greatly affected by the dead time effect and the maximum number of photons received. When the transmission distance is sh...

Claims

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Application Information

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IPC IPC(8): H04B10/116H04B10/67H04B10/70H04B13/02
CPCH04B10/116H04B10/67H04B10/70H04B13/02
Inventor 朱义君王超于宏毅邬江兴张剑田忠骏仵国锋汪涛刘洛琨李青
Owner THE PLA INFORMATION ENG UNIV
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