Sea Fog Attenuation Analysis of White-LED Light Sources for Maritime VLC

Maritime VLC has features of high speed, low cost and anti-EMI. The scattering attenuation of sea fog particles for white-LED light source will directly affect the signal transmission. Due to meteorological effects, much physical detail could be lost in Maritime VLC. Effects of changes in the particle size distributions and influences of different sources cannot easily be taken into account. To address this issue, this paper presents scattering spectrum analysis of sea fog particles and attenuation of maritime VLC channel systematically. Firstly, based on sea fog parameters, the scattering, extinction and phase functions of sea fog particles can be calculated by employing Mie theory. Furthermore, scattering analysis of sea fog particle swarm could be evaluated. Then transmission attenuation of wide spectrum white-LED is analyzed by utilizing revised Gamma distribution. According to the sensitivity of the receiver detector in visible light band, the change of white light transmission spectrum is weighted. At last, combined with the white LED spectrum collected by the experiment, simulations describe that spectrum changes of white LED are obtained after transmission for a certain distance.