Performance analysis of a hybrid FSO–FO link with smart decision making system under adverse weather conditions

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Pradyut Mohapatra ◽  
Garima Singh ◽  
Anjali Singh ◽  
Gurjit Kaur
Keyword(s):  
Decision Making ◽  
Optical Fibers ◽  
Communication Systems ◽  
Weather Conditions ◽  
Wireless Communication Systems ◽  
Free Space Optical ◽  
Modulation Format ◽  
Adverse Weather Conditions ◽  
Adverse Weather ◽  
Decision Making System

Abstract Optical wireless communication systems employing free-space optical (FSO) links utilize modulated lasers to transmit information. FSO–fiber optic (FO) link provides an alternative possible way in scenarios where infrastructures employing optical fibers are widely destroyed due to disasters or when difficulties are faced during the installation of FO links. Furthermore, the link is integrated with decision-making ability. To encounter the distortions in the received signal carrier-suppressed return-to-zero modulation format has been used. FSO–FO hybrid link has been compared with simple FSO channel. The terrestrial links depend strongly on weather conditions as optical beams propagate through the atmosphere. Atmospheric attenuation could affect the FSO channel and has been considered to analyze the performance of the designed system.

Performance Analysis of FSO Links in Turbulent Atmosphere

2020 ◽  
pp. 100-156
Author(s):  
Banibrata Bag ◽  
Akinchan Das ◽  
Aniruddha Chandra ◽  
Rastislav Róka
Keyword(s):  
Atmospheric Turbulence ◽  
Communication Systems ◽  
Weather Conditions ◽  
Free Space Optical ◽  
Wireless Optical Communication ◽  
Adverse Weather Conditions ◽  
Adverse Weather ◽  
Optical Communication Systems ◽  
Active Research ◽  
Atmospheric Channel

The free-space optical communications technology is emerging as an attractive substitute to RF communications. It can satisfy the current demands for higher bandwidth to the customer. Atmospheric turbulence is a major obstacle in wireless optical communication systems. To fully utilize the terabit capacity of FSO system, it has to overcome various challenges offered by the heterogeneous nature of the atmospheric channel. Currently, FSO communication through atmospheric turbulence under adverse weather conditions is an active research topic. A lot of studies and experiments have been carried out on the effect of attenuation due to atmospheric turbulence; but still, much more research is necessary for fulfilling the current demands and commercial needs for implementing this technology successfully. This chapter discussed the various limitations of FSO system which are faced during data transmission through the atmospheric channel and various ways to improve the performance regarding BER, outage probability, and channel capacity.

scholarly journals Decision making in adverse weather conditions

2016 ◽  
Vol 9 (5) ◽  
Author(s):  
Gustavo Rodrigues de Oliveira Silva ◽  
Humberto César Machado
Keyword(s):  
Decision Making ◽  
Weather Conditions ◽  
Adverse Weather Conditions ◽  
Adverse Weather

Estimating the Performance of Free Space Optical Link Under Adverse Weather Conditions by Using Various Models

2018 ◽  
Vol 103 (2) ◽  
pp. 1603-1613 ◽  
Author(s):  
Govardhani Immadi ◽  
M. Venkata Narayana ◽  
Sarat K. Kotamraju ◽  
A. Sree Madhuri
Keyword(s):  
Free Space ◽  
Weather Conditions ◽  
Free Space Optical ◽  
Optical Link ◽  
Adverse Weather Conditions ◽  
Adverse Weather

scholarly journals Ship Handling in Unprotected Waters: A Review of New Technologies in Escort Tugs to Improve Safety

2021 ◽  
Vol 2 (1) ◽  
pp. 46-62
Author(s):  
Santiago Iglesias-Baniela ◽  
Juan Vinagre-Ríos ◽  
José M. Pérez-Canosa
Keyword(s):  
High Performance ◽  
New Technologies ◽  
Weather Conditions ◽  
Hull Form ◽  
Best Available Technologies ◽  
Adverse Weather Conditions ◽  
Adverse Weather ◽  
New Type ◽  
Technological Challenge ◽  
And Performance

It is a well-known fact that the 1989 Exxon Valdez disaster caused the escort towing of laden tankers in many coastal areas of the world to become compulsory. In order to implement a new type of escort towing, specially designed to be employed in very adverse weather conditions, considerable changes in the hull form of escort tugs had to be made to improve their stability and performance. Since traditional winch and ropes technologies were only effective in calm waters, tugs had to be fitted with new devices. These improvements allowed the remodeled tugs to counterbalance the strong forces generated by the maneuvers in open waters. The aim of this paper is to perform a comprehensive literature review of the new high-performance automatic dynamic winches. Furthermore, a thorough analysis of the best available technologies regarding towline, essential to properly exploit the new winches, will be carried out. Through this review, the way in which the escort towing industry has faced this technological challenge is shown.

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