On the Use of a Direct Radiative Transfer Equation Solver for Path Loss Calculation in Underwater Optical Wireless Channels
On the Use of a Direct Radiative Transfer Equation Solver for Path Loss Calculation in Underwater Optical Wireless Channels
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DOI：
10.1109/lwc.2015.2459697
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发表时间：
2015-07
影响因子：
6.3
通讯作者：
Changping Li;Kihong Park;Mohamed-Slim Alouini
中科院分区：
文献类型：
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作者：
Changping Li;Kihong Park;Mohamed-Slim Alouini
在这封信中，我们提出了一个快速数值解的稳态辐射传输方程，以计算光传播的光路损耗遭受衰减由于吸收和散射在各种水类型。我们采用最优非均匀方法离散的角度空间和迎风型有限差分方法离散的空间空间。然后应用Gauss-Seidel迭代法求解完全离散的线性方程组。最后，通过方位角对称假设，将二维辐射率扩展到三维，计算了给定接收孔径和视场下的接收光功率。通过均匀RTE求解器和Monte Carlo仿真验证了该方法的准确性和有效性。
In this letter, we propose a fast numerical solution for the steady state radiative transfer equation in order to calculate the optical path loss of light propagation suffering from attenuation due to the absorption and scattering in various water types. We apply an optimal non-uniform method to discretize the angular space and an upwind type finite-difference method to discretize the spatial space. A Gauss-Seidel iterative method is then applied to solve the fully discretized system of linear equations. Finally, we extend the resulting radiance in two-dimensional to three-dimensional by the azimuthal symmetric assumption to compute the received optical power under the given receiver aperture and field of view. The accuracy and efficiency of the proposed scheme are validated by uniform RTE solver and Monte Carlo simulations.