A dual-wavelength underwater wireless optical communication method and system

Abstract

The invention belongs to the field of underwater wireless optical communication, and relates to a dual-wavelength underwater wireless optical communication method and system. The method includes: controlling the transmitting system to combine two beams of light with different wavelengths to form an optical signal A; transforming the optical signal A into an optical signal B with a divergence angle θ, and sending it to the receiving end through a channel; controlling the receiving system to The received optical signal B is divided into two beams, one beam of optical signal is processed into electrical signal C1 after filtering, photoelectric conversion, and the other beam of optical signal is processed into electrical signal C2 through filtering, photoelectric conversion, and smoothing filtering. The signals C1 and C2 are subjected to light intensity compensation processing to output the electrical signal out; the electrical signal out is demodulated and decoded, and finally the original signal is obtained. Compared with the existing space diversity technology, the system uses the same optical receiving module to receive light intensity, and only consists of two photoelectric detection circuits, with small size, low cost and more compact overall structure.

Description

A dual-wavelength underwater wireless optical communication method and system technical field The invention belongs to the technical field of wireless optical communication, and relates to a dual-wavelength underwater wireless optical communication method and system. system. Background technique Underwater wireless information transmission is used in military activities, pollution detection, oil control, climate change monitoring, and oceanographic research. It plays an important role in research and other fields, and has received extensive attention from the military, industrial and scientific circles. Compared with traditional underwater acoustic communication, Underwater wireless optical communication has the advantages of high bandwidth, low power consumption, anti-interference, etc., so it has gradually attracted people's attention. [0003] Ocean turbulence is one of the main factors affecting the transmission performance of underwater wireless optical communica...

AI Technical Summary

Problems solved by technology

After the optical signal passes through the ocean turbulent channel, it will cause the light intensity at the receiving end to flicker, causing the dynamic time-varying effect of the received power, thereby deteriorating the communication quality of the underwater wireless optical communication system

In response to the above problems, researchers proposed space diversity technology to alleviate the impact of ocean turbulence on underwater wireless optical communication systems, and space diversity technology is to alleviate the impact of ocean turbulence on underwater wireless optical communication systems by using multiple receivers with a certain space interval. Communication performance, but its cost is high and bulky

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