Effect of Environmental Parameters on the Performance of Optical Wireless Communications

Abstract

Free space optical communication systems are the future of the communication systems which can meet the needs of the end users who are demanding high bandwidths to support high-speed communication. These merits are due to its numerous advantages as well as their better performance. This paper studies the effect of environmental parameters like rain, fog, haze, snow, and dust on the performance of optical wireless communications using Opti-system program. This work considers the effect of visibility as well as operating wavelengths on atmospheric attenuation in different weather conditions for free space optical link. For different weather conditions the max distance between transmitter and receiver can also be estimated. The system analysis depicted the better performance of the Multi-Input/Multi-Output (MIMO) configurations compared to Single Input/Single Output (SISO) at different weather conditions.

Performance analysis of WDM MIMO RoFSO links for 5G applications

“…The attenuation α is estimated as: where ν denotes visibility in km, λ specifies the transmission wavelength in nm, and q refers to the attenuation producing atmospheric particle size distribution. A reference wavelength of 550 nm is fixed as reference wavelength λ0 for computing attenuation [32].…”

“…The ( 2) is used to estimate the attenuation for various atmospheric conditions. The attenuation in decibels τ, can be calculated as, τ = 4.3429 × α × L where L is transmission range [32]. For the study conducted, the weather is assumed to be clear sky with minimum attenuation.…”

Development of a method of processing images of laser beam bands with the use of parallel­hierarchic networks

“…In [4], the authors investigate the "contour tape" method for classifying the image of laser beam spots, where the calculations are performed in stages in a single stream, which reduces the efficiency. In [6], atmospheric effects on the laser beam are studied in AOCL systems in various weather conditions. To improve the quality of the signal at different wavelengths, it is proposed to use a 4/4 system, that is, 4 receivers and 4 transmitters.…”

“…But this raises the problem of the influence of the atmosphere on the propagation of the laser beam and the adjustment of the position of the transmitter and receiver. To solve this problem, in [6,7] it is proposed to increase the number of reception and transmission devices by 4 times and 2 times, but this will lead to a rise in price of such a system by 4 and 2 times, respectively. In [9][10][11], the attenuation of the power of a laser beam is studied under conditions of turbulence of the atmosphere of different terrain, which causes beam deformation of various types, as shown (Fig.…”

“…Also, most of the known works do not mention the problem of loss of communication due to the need to adjust the position of the receiver. For example, during the operation of satellite-to-ground AOCL, a constant adjustment of the position of the receiving device relative to the position of the transmitter is necessary, for which the exit of the laser beam beyond the limits of the receiving lens will lead to a complete loss of communication [6][7][8][9][10][11].…”