Abstract
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.
Highlights
Free space optics (FSO) communication system has been a preferred communication system compared to radio frequency (RF). e advances in technology and increasing requirements have been contributed to the development of free space optics (FSO) communication system [1].FSO communication provides high data rate, high transmission security, no frequency allocation, small size and low power requirement, and easy installation [2]
Free space optics (FSO) communication system has been a preferred communication system compared to radio frequency (RF). e advances in technology and increasing requirements have been contributed to the development of FSO communication system [1]
Another step is the calculation of the signal noise ratio (SNR) in Taguchi’s method
Summary
FSO communication provides high data rate, high transmission security, no frequency allocation, small size and low power requirement, and easy installation [2]. FSO communication systems have some disadvantages such as attenuation effects that lead to signal weakness and limitation of transmission for communication. To obtain a better performance, the path between the receiver and the transmitter for FSO communication system should have a clean line of sight [3, 4]. Another attenuation effect is regarding the turbulence which occurs due to temperature and pressure fluctuations in the atmosphere. The scintillation depending on the turbulence limits the data transmission speed and system performance in long-range communication [6]
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