scholarly journals EXAMPLE OF SWITCHING HYBRID FSO/RF SYSTEMS

2021 ◽  
Vol 20 (4) ◽  
pp. 27-31
Author(s):  
Renát HALUŠKA ◽  
◽  
Ľuboš OVSENÍK
Keyword(s):  
Machine Learning ◽  
Optical Communication ◽  
Free Space ◽  
Weather Conditions ◽  
Free Space Optics ◽  
Communication Link ◽  
Transmission Channel ◽  
Radio Communication ◽  
Rf Systems ◽  
Space Optics

This article addresses the issue of optical communication with Free Space Optics (FSO) and its use. The article deals with the design and construction of a monitoring system designed for the collection and processing of data characterizing the nature of conditions along the transmission path of a hybrid FSO system with a radio communication link. Due to the vulnerability of the FSO transmission channel to weather conditions, it is necessary to predict the strength of the received signal and switch to a backup line based on machine learning using decision trees.

Improved Performance Analysis of Free Space Optics Communication Link under Rain Conditions using EDFA Pre-amplifier

2018 ◽  
Vol 39 (2) ◽  
pp. 241-246 ◽  
Author(s):  
Mehtab Singh
Keyword(s):  
Performance Analysis ◽  
Free Space ◽  
Weather Conditions ◽  
Fiber Amplifier ◽  
Free Space Optics ◽  
Communication Link ◽  
Erbium Doped Fiber Amplifier ◽  
Space Optics ◽  
Link Distance ◽  
Improved Performance

AbstractFree Space Optics (FSO) also known as Optical Wireless Communication (OWC) is a communication technology in which free space/air is used as the propagation medium and optical signals are used as the information carriers. One of the most crucial factors which degrade the performance of FSO link is the signal attenuation due to different atmospheric weather conditions such as haze, rain, storm, and fog. In this paper, an improved performance analysis of a 2.5 Gbps FSO link under rain conditions has been reported using Erbium-Doped Fiber Amplifier (EDFA) as a pre-amplifier. The results show that the maximum link distance for an FSO link under rain weather conditions with acceptable performance levels (Q$$\sim6$$and BER$$ \le {10^{- 9}})$$in the absence of EDFA pre-amplifier is 1,250 m which increases to 1,675 m with the use of EDFA pre-amplifier.

Modelling of 10 Gbps Free Space Optics Communication Link Using Array of Receivers in Moderate and Harsh Weather Conditions

2017 ◽  
Vol 38 (3) ◽  
Author(s):  
Amit Gupta ◽  
Nagpal Shaina
Keyword(s):  
Free Space ◽  
Weather Conditions ◽  
Quality Data ◽  
Laser Source ◽  
Communication Link ◽  
Free Space Optical ◽  
Space Optics ◽  
Received Power ◽  
Adverse Weather ◽  
The Impact

AbstractIntersymbol interference and attenuation of signal are two major parameters affecting the quality of transmission in Free Space Optical (FSO) Communication link. In this paper, the impact of these parameters on FSO communication link is analysed for delivering high-quality data transmission. The performance of the link is investigated under the influence of amplifier in the link. The performance parameters of the link like minimum bit error rate, received signal power and Quality factor are examined by employing erbium-doped fibre amplifier in the link. The effects of amplifier are visualized with the amount of received power. Further, the link is simulated for moderate weather conditions at various attenuation levels on transmitted signal. Finally, the designed link is analysed in adverse weather conditions by using high-power laser source for optimum performance.

Design of high speed multistream free space optics link under clear weather conditions

2020 ◽  
Vol 3 (3/4) ◽  
pp. 195
Author(s):  
Shantanu Jagdale ◽  
Brijesh Iyer ◽  
Sanjay L. Nalbalwar ◽  
Shankar B. Deosarkar
Keyword(s):  
Free Space ◽  
High Speed ◽  
Weather Conditions ◽  
Free Space Optics ◽  
Space Optics ◽  
Clear Weather

scholarly journals Performance Analysis of Q Factor Optical Communication in Free Space Optics and Single Mode Fiber

2019 ◽  
Vol 6 (3) ◽  
pp. 167-175 ◽  
Author(s):  
Salim Burdah ◽  
Octarina Nur Samijayani ◽  
Ary Syahriar ◽  
Rizki Ramdhani ◽  
Rahmat Alamtaha
Keyword(s):  
Performance Analysis ◽  
Optical Communication ◽  
Free Space ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Free Space Optics ◽  
Q Factor ◽  
Space Optics

scholarly journals Prediction of Received Optical Power for Switching Hybrid FSO/RF System

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1261
Author(s):  
Renát Haluška ◽  
Peter Šuľaj ◽  
Ľuboš Ovseník ◽  
Stanislav Marchevský ◽  
Ján Papaj ◽  
...  
Keyword(s):  
Optical Communication ◽  
Free Space ◽  
Communication Systems ◽  
Prediction Models ◽  
Optical Power ◽  
Free Space Optics ◽  
Communication Line ◽  
Atmospheric Transmission ◽  
Space Optics ◽  
Weather Information

This study deals with the problem of fiber-free optical communication systems—known as free space optics—using received signal strength identifier (RSSI) prediction analysis for hard switching of optical fiber-free link to base radio-frequency (RF) link and back. Adverse influences affecting the atmospheric transmission channel significantly impair optical communications, therefore attention was paid to the practical design, as well as to the implementation of the monitoring device that is used to record and process weather information along a transmission path. The article contains an analysis and methodology of the solution of the high availability of the optical link. Attention was paid to the technique of hard free space optics (FSO)/RF-switching with regard to the amount of received optical power detected and its relation to the quantities influencing the optical communication line. For this purpose, selected methods of machine learning were used, which serve to predict the received optical power. The process of analysis of prediction of received optical power is realized by regression models. The study presents the design of the optimal data input matrix model, which forms the basis for the training of the prediction models for estimating the received optical power.

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