IMPROVING THE EFFICIENCY OF HIGH-PERFORMANCE FREE SPACE OPTICAL COMMUNICATION CHANNELS IN VARIOUS WEATHER CONDITIONS
Abstract
A common problem of traditional radio communication channels - the lack of free frequencies,
noise, low bandwidth, the need to obtain a license to use the frequency, the relative ease of hacking.
Free space optical communication channels overcome these limitations, is one of the types of communication
systems that use open space to transmit information carried by light - this points to the
need for direct visibility of the transceivers. Due to the influence of various weather conditions, the
light flux is subject to atmospheric attenuation. In this paper, a method to improve the efficiency of
high-performance wireless optical communication channels in different weather conditions: clear
sky, fog, rain and snow was investigated. The existing wireless optical communication technology, a
dense multiplexing multiplexing (DWDM) system with one input and one output (SISO), was considered.
And it was proposed to improve the existing system by applying multiple input/output (MIMO).
An impact and attenuation analysis on the wireless optical network in different weather conditionswas conducted. The study was based on the use of the Optisystem simulation software toolkit, which
is used to emulate different weather conditions of attenuation in two types of systems. Models were
developed for each of the optical communication systems studied. A comparison between SISO and
MIMO systems is made in terms of quality factor under different weather conditions. The proposed
system shows promising results in terms of performance and received signal quality. The transmission
path length of the proposed system in dense fog conditions increases by 33.6%. The transmission
path length of the proposed system in heavy rain increases by 63.89%. The transmission path
length of the proposed system in heavy snow increases by 35,21%.
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