Monte Carlo Based Channel Characteristics for Underwater Optical Wireless Communications

2017 ◽  
Vol E100.B (4) ◽  
pp. 612-618 ◽  
Author(s):  
Ai-ping HUANG ◽  
Lin-wei TAO
Keyword(s):  
Monte Carlo ◽  
Wireless Communications ◽  
Optical Wireless ◽  
Optical Wireless Communications ◽  
Channel Characteristics

scholarly journals Scattering Regimes for Underwater Optical Wireless Communications using Monte Carlo Simulation

2018 ◽  
Vol 8 (4) ◽  
pp. 2571 ◽  
Author(s):  
F. Jasman ◽  
A. M. Zaiton ◽  
Z. Ahmad ◽  
Z. Rihawi
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Wireless Communications ◽  
Transition Point ◽  
Channel Model ◽  
Path Loss ◽  
Turbid Water ◽  
Optical Wireless ◽  
Optical Wireless Communications ◽  
Acoustic Technologies

<span>Optical wireless communications has shown tremendous potential for underwater applications as it can provide higher bandwidth and better security compared to acoustic technologies. In this paper,  an investigation on scattering regimes for underwater links using Monte Carlo simulation has been presented.While the focus of this paper is on diffuse links, the simulation results of collimated links is also provided for comparison purpose. Three types of water namely clear, coastal and turbid water are being used in the simulation. It is shown that the effect of scattering on the path loss cannot be accurately modeled by the existing channel model; ie. Beers-Lambert (BL) law.  It has been shown that  the distance at which the unscattered light drops to zero can be used to estimate the transition point for the scattering regimes in case of diffuse links. The transition point for diffuse links in coastal water and turbid water can be estimated to be around 22 m and 4 m respectively. Further analysis on the scattering order probability at different scattering regimes illustrates how scattering is affected by beam size, water turbidity and distance. From the frequency response plot, it is estimated that the bandwidth of several order of GHz can be achieved when the links are operating in the minimal scattering region and will reduce to several hundreds of MHz when the link is operating in multiple scattering region.</span>

scholarly journals Investigation of the Scattering Noise in Underwater Optical Wireless Communications

Sci ◽  
2021 ◽  
Vol 3 (2) ◽  
pp. 27
Author(s):  
Behnaz Majlesein ◽  
Asghar Gholami ◽  
Zabih Ghassemlooy
Keyword(s):  
Wireless Communications ◽  
Optical Wireless ◽  
Clear Water ◽  
Optical Wireless Communications ◽  
Channel Bandwidth ◽  
Phase Variations ◽  
Transmission Link ◽  
Channel Dependent ◽  
First Time ◽  
Scattering Noise

In underwater optical wireless communications (UOWC), scattering of the propagating light beam results in both intensity and phase variations, which limit the transmission link range and channel bandwidth, respectively. Scattering of photons while propagating through the channel is a random process, which results in the channel-dependent scattering noise. In this work, we introduce for the first time an analytical model for this noise and investigate its effect on the bit error rate performance of the UOWC system for three types of waters and a range of transmission link spans. We show that, for a short range of un-clear water or a longer range of clear water, the number of photons experiencing scattering is high, thus leading to the increased scattering noise. The results demonstrate that the FEC limit of 3×10−3 and considering the scattering noise, the maximum link spans are 51.5, 20, and 4.6 m for the clear, coastal, and harbor waters, respectively.

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