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Short Range Underwater Communication Using Visible Led
This document proposes using visible light LEDs for short-range underwater wireless communication as an alternative to conventional acoustic systems. It analyzes the performance of such an optical system by modeling the underwater wireless optical channel based on underwater optics. The analysis shows that a single-color LED performs poorly in the wavelength-dependent underwater environment. To address this, the paper proposes a multi-wavelength adaptive scheme combined with rate adaptive transmission that can adapt to channel changes by controlling data rate and power for each wavelength band. An experiment was conducted to confirm the analysis by measuring received power and bit error rate in a turbid water tank.
