Underwater adaptive wireless optical communication apparatus and method

Abstract

The present invention relates to an underwater adaptive wireless optical communication apparatus. The apparatus includes an optical transmit terminal, an optical receive terminal and a main control board. Blue and green lasers are used for underwater communication. The blue and green lasers are at a seawater low-loss window, so that the transmission loss is low. In addition, blue and green reinforced photomultiplier tubes are used as photodetectors, and a preamplifier circuit and a main amplifier circuit are also used, so that the apparatus has good detection sensitivity and has a long communication distance. Active lighting and an echo signal are combined for measurement of optical parameters of water quality, so that the apparatus has a compact structure, is reliable in measurement, and has good commonality.

Description

technical field [0001] The present invention relates to an adaptive wireless optical communication device and method in an underwater environment, especially in a marine environment, especially a method based on the monitored full waveform of backscattered echo signals to predict the communication optical pulses to be received by the opposite end Width and amplitude, so as to select the appropriate modulation and encoding parameters and emission parameters, and obtain a matching communication rate under the premise of ensuring the communication margin, without increasing the average power of the additional light source, by reducing the single pulse energy and increasing the repetition frequency of the laser and reduce the pulse position modulation time slot width to achieve a higher communication rate for the same transmission distance under better water quality conditions, or reduce the laser repetition frequency, increase the single pulse energy and increase the pulse positio...

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Problems solved by technology

[0005] The problem to be solved by the present invention is to overcome the difficulties encountered in the application of a single-parameter wireless optical communication system in the marine environment, to meet the needs of adaptive parameter adjustment under different water quality parameters, and to provide a general-purpose underwater adaptive wireless optical communication device and method, the device can solve the problem that a single communication rate cannot give full play to the system performance under different water quality conditions and long-distance high-speed information transmission in the depths of the ocean, and achieve a longer communication distance or a greater communication rate as much as possible. It meets the conditions of different water quality conditions, multi-sensor interconnection in the depths of the ocean, communication between underwater mother ship and sub-ship, sub-ship and sub-ship, communication between mother ship and frogman, and between frogmen, and can be applied to large-scale ship formations on the water surface Cooperation between surface and underwater, and communication between deep-sea workstations and deep-sea robots

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