Underwater wireless optical communication method and system

A wireless optical communication and optical signal technology, applied in the field of communication, can solve problems such as low signal-to-noise ratio and poor stability, achieve the effect of ensuring stability and anti-interference ability, and improving transmission distance and stability

Inactive Publication Date: 2021-01-29
PENG CHENG LAB
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Problems solved by technology

[0004] The main purpose of the present invention is to provide an underwater wireless optical communication method and system,

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  • Underwater wireless optical communication method and system
  • Underwater wireless optical communication method and system
  • Underwater wireless optical communication method and system

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Embodiment Construction

[0044] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] Such as figure 1 as shown, figure 1 It is a schematic diagram of the device structure of the hardware operating environment involved in the solution of the embodiment of the present invention.

[0046] The terminal in the embodiment of the present invention may be an underwater wireless optical communication system, which mainly includes a sending end, a channel, and a receiving end. It can be understood that the channel in the underwater wireless optical communication system may be water or other media such as air.

[0047] Such as figure 1As shown, the terminal may include: a processor 1001 , such as a CPU, a communication bus 1002 , a user interface 1003 , a network interface 1004 , and a memory 1005 . Wherein, the communication bus 1002 is used to realize connection and communication between these compo...

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Abstract

The invention discloses an underwater wireless optical communication method and system, and the method comprises the steps: controlling a transmitting end to carry out the precoding of an original electric signal, and carrying out the phase modulation of light through an optical phase modulator, so as to generate an optical modulation signal; sending the light modulation signal to a receiving endthrough an underwater channel; and controlling the receiving end to perform self-coherent demodulation on the optical modulation signal so as to convert the optical modulation signal into an originaloptical signal, and converting the original optical signal into an original electric signal through the optical signal detector. According to the method, an electric signal can be converted into an optical modulation signal, the intensity of light is not changed, information is carried only through the phase of light, and different from the traditional mode of realizing modulation by changing thelight intensity, the signal is transmitted to a receiving end through an underwater channel; and when the receiving end performs demodulation processing by using the single-photon detector array, various interferences and losses of signals in the underwater transmission process can be eliminated, the signal-to-noise ratio is increased, and the transmission distance, the anti-interference capability and the stability of underwater wireless transmission are improved.

Description

technical field [0001] The invention relates to the communication field, in particular to an underwater wireless optical communication method and system. Background technique [0002] At present, with the continuous progress of human exploration of the ocean, underwater activities are also increasing rapidly. Underwater network technology has also been widely used in marine environments. Existing underwater wireless communication is mainly realized by sound waves. Sound waves have limited bandwidth and high latency, making them unsuitable for high-speed data transmission. Therefore, in the underwater short-distance communication link, the way of acoustic wave communication has been gradually replaced by the way of optical wireless communication. [0003] Existing underwater optical communication methods are all based on amplitude modulation and are susceptible to flickering effects caused by turbulence. However, in the optical communication system based on amplitude modu...

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Application Information

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IPC IPC(8): H04B10/80H04B10/556H04B10/69
CPCH04B10/80H04B10/5561H04B10/69
Inventor 陈圳唐昕柯孙彩明张爱东
Owner PENG CHENG LAB
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