In this study, Mie and Rayleigh scattering in free space optics (FSO) communication systems were investigated in terms of the atmospheric attenuation. Because of the movement of the Earth, the communication distance and surrounding gas densities are inconsistent in each region. This change leads to atmospheric attenuation and then data losses and inefficient communication in FSO occur. Therefore, the density change and distance must be calculated in each communication once the data is transmitted. In the literature, it was observed that the atmospheric attenuation is regarding some FSO communication parameters such as transmission distance, visibility, and scatter particle size distribution, the number of particles per unit volume, scatter cross-sectional area, and wavelength. Besides, in real-time communication, it is necessary to update FSO parameters simultaneously. However, this updating process for all parameter takes a long time to adapt to a new position. This paper proposes the design of the experiment method (Doe) to determine the severity of the FSO parameters. And Taguchi’s Doe method allows analyzing of FSO communication system parameters to avoid long calculation time. Results show that the proposed method helps in understanding the priorities of the parameters in FSO and reducing the updating time.

中文翻译：

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使用Taguchi方法研究FSO通信系统中的大气衰减因子

在这项研究中，针对大气衰减，研究了自由空间光学（FSO）通信系统中的Mie和瑞利散射。由于地球的运动，每个区域的通讯距离和周围气体密度都不一致。这种变化导致大气衰减，然后在FSO中发生数据丢失和低效率的通信。因此，一旦发送数据，就必须在每次通信中计算密度变化和距离。在文献中，观察到大气衰减与某些FSO通信参数有关，例如传输距离，可见性和散射粒度分布，每单位体积的粒子数，散射横截面积和波长。此外，在即时通讯中 必须同时更新FSO参数。但是，所有参数的更新过程都需要很长时间才能适应新位置。本文提出了确定FSO参数严重性的实验方法（Doe）的设计。Taguchi的Doe方法可以分析FSO通信系统参数，从而避免了较长的计算时间。结果表明，该方法有助于了解FSO中参数的优先级，并减少更新时间。