Analysis of Channel Characteristics of Underwater Wireless Blue LED Communication System and Outfield Experimental Research

One of the key technologies of deep-sea operation is underwater wireless optical communication technology, and blue Light has good penetration ability in water, this paper focuses on analyzing the characteristics of blue light transmission channel in water, and develops a prototype with 4-LED array as the light source. The prototype uses The fresnel lens as the receiving antenna, realizes the design intention of miniaturization while realizing the large FOV (field of view), and conducted a communication experiment in the lake water. The prototype can carry on the stable communication with the BER (bit error rate) as low as 10
⁻⁶
in the natural water body with attenuation coefficient of 1.25m
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.