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Underwater wireless optical communication system and method based on calculation time domain ghost imaging

A technology of wireless optical communication and ghost imaging, applied in optical transmission systems, transmission systems, electromagnetic wave transmission systems, etc., can solve problems such as short communication distance, low transmission frequency, and poor long-distance communication effect

Active Publication Date: 2021-04-27
纳微朗科技(深圳)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, this application provides an underwater wireless optical communication system based on computational time-domain ghost imaging and its method and storage device to solve the problems of short communication distance, low transmission frequency, and long-distance communication in the prior art. The problem of poor performance

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  • Underwater wireless optical communication system and method based on calculation time domain ghost imaging
  • Underwater wireless optical communication system and method based on calculation time domain ghost imaging
  • Underwater wireless optical communication system and method based on calculation time domain ghost imaging

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Embodiment 1

[0072] In order to realize underwater long-distance wireless optical communication, the structures of the LOS (line of sight) channel model and the NLOS (not line of sight) channel model of the underwater wireless optical communication system 10 of the present application are as follows Figure 6 shown.

[0073] Underwater wireless optical communication method:

[0074] Firstly, the underwater robot or underwater submersible device carrying the transmitter device 11 of the present application and the underwater robot or submersible submersible device carrying the receiving device 12 of the present application are prepared for communication, including optical path alignment and synchronization. After the preparation is completed, the transmitting device 11 sends the signal modulated by the computational time-domain ghost imaging algorithm, and the receiving device 12 detects the light intensity value of the optical signal, converts the light intensity value into a releva...

Embodiment 2

[0076] Under laboratory conditions, a glass container filled with water is used to simulate the underwater environment of the ocean, and the modulated signal generated by modulating the 128-bit PRBS code (the digital signal spliced ​​after the preset signal has been modulated 128 times) is loaded to the arbitrary waveform generator In this example, the light source 112 is driven at a frequency of 1 GHz to emit light signals. The optical signal propagates to the receiving device 12 underwater, is collected by the optical detector 121 after being gathered by the focusing lens 125 of the receiving device 12 and generates an electrical signal, and combines the electrical signal with a 128×128 Hadamard matrix (such as Figure 7 shown) to carry out the second-order correlation calculation, and obtain the reconstructed signal in pure water as Figure 8 Shown; Adopt the underwater wireless optical communication system 10 of OOK modulation to sample 128 groups after the same averag...

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Abstract

The invention relates to the technical field of underwater visible light communication, in particular to an underwater wireless optical communication system and method based on calculation time domain ghost imaging and a storage device, and the underwater wireless optical communication system comprises a transmitting device which comprises a signal modulation unit, and is used for loading a preset signal and modulating the preset signal based on a calculation time domain ghost imaging algorithm so as to generate a modulation signal; a signal generation unit, used for loading a modulation signal and generating a corresponding driving voltage signal; a light source, used for generating light signals according to the modulation signals; a receiving device, comprising an optical detector used for detecting a light intensity value of an optical signal and carrying out photoelectric conversion; a data acquisition unit, used for acquiring an electric signal of the optical detector; and a data synchronization and processing unit, used for carrying out correlation calculation to obtain a reconstruction signal of the preset signal. Through the mode, the problems of short communication distance, low transmitting frequency and the like in the existing underwater wireless optical communication technology can be solved.

Description

technical field [0001] The application belongs to the technical field of underwater wireless optical communication, and in particular relates to an underwater wireless optical communication system, an optical communication method, and a storage device based on computational time-domain ghost imaging. Background technique [0002] Currently, there are three ways to communicate in an underwater environment, using sound waves, radio frequency waves, and light waves for data transmission. [0003] In the long-term research and development process, the inventors of the present application have found that the transmission data rate of underwater acoustic wave communication is relatively low (usually kbps level), and the propagation speed of sound waves in water is slow, resulting in serious communication delays; the radio frequency of underwater radio frequency communication The wave attenuation is serious, and it can only propagate for a few meters; the light wave in the underwat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/80H04B10/516H04B10/60
CPCH04B10/80H04B10/516H04B10/60Y02D30/70
Inventor 田朋飞陈新伟闫春辉方志来张国旗
Owner 纳微朗科技(深圳)有限公司
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