Performance analysis of FSO link under the effect of fog in Delhi region, India

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Sanmukh Kaur
Keyword(s):  
Weather Conditions ◽  
Free Space Optics ◽  
Space Optics ◽  
Optical Attenuation ◽  
Rate Transmission ◽  
Visibility Distance ◽  
Visibility Range ◽  
Link Availability ◽  
Data Rate Transmission ◽  
Descriptive Statistical Analysis

AbstractFog attenuation causes more loss than other weather conditions in a free space optics (FSO) link thus limiting the visibility distance. This work presents a detailed survey on the attenuation of the transmitted signal as a result of variation in visibility range caused by different fog conditions of the Delhi, Safdarjung region. Kim and Kruse models have been used to calculate attenuation as a result of fog conditions for three specific months (January, February and December) for seven consecutive years starting from 2013 to 2019. Received signal quality has been analyzed as a function of transmitted power, data rate, transmission range and operation wavelength. Descriptive statistical analysis of real time observed visibility data allows for the estimation of specific optical attenuation and enables in determining the link availability of the region for the complete year.

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.

Estimation of optical attenuation in reduced visibility conditions in different environments across free space optics link

2017 ◽  
Vol 11 (12) ◽  
pp. 1708-1713 ◽  
Author(s):  
Kapal Dev ◽  
Roberto Nebuloni ◽  
Carlo Capsoni ◽  
Ondrej Fiser ◽  
Vladimir Brazda
Keyword(s):  
Free Space ◽  
Free Space Optics ◽  
Space Optics ◽  
Optical Attenuation

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

FSO performance analysis of a metro city in different atmospheric conditions

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Rajat Kumar Giri
Keyword(s):  
Weather Conditions ◽  
Free Space Optics ◽  
Atmospheric Conditions ◽  
Atmospheric Attenuation ◽  
Space Optics ◽  
Total Attenuation ◽  
Modulation Technique ◽  
Link Margin ◽  
Simulation Results ◽  
Margin Analysis

Abstract In this article, a free-space-optics (FSO) model for a metro city based on real-time visibility data under different weather conditions is presented. Here, the relation between atmospheric attenuation and visibility value and its impact on the FSO performance is carried out. Also, the hybrid-SIM modulation technique is applied for the bit error rate (BER) improvement of the system. Here, Bhubaneswar (the capital of Odisha, India) is considered for the above analysis. The total attenuation, BER, and link margin are calculated for the FSO performance evaluation of Bhubaneswar city and these are simulated using Matlab. The simulation results show that the proposed hybrid-SIM modulation technique achieves about 2.9 dB of SNR improvement than the existing BPSK-SIM technique. Also, from the link margin analysis, it is observed that the sunny day is the most suitable for FSO link transmission. These results can be helpful to decide the FSO parameters and the FSO setup can be designed for any city.

Optical Attenuation & Atmospheric Visibility of Free Space Optics

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Beenish Hafeez ◽  
Shahid Iqbal ◽  
Areeba Asif ◽  
Meera Tariq
Keyword(s):  
Dust Storm ◽  
Free Space ◽  
Paper Analysis ◽  
Dust Particles ◽  
Free Space Optics ◽  
Atmospheric Conditions ◽  
Space Optics ◽  
Optical Attenuation ◽  
Communication Links ◽  
Dust Effects

The study was conducted at University of Gujrat during 2015 with an objective to explore the effects of dust on Free Space Optics (FSO) communication. Growing pollution and dust gales motivated studies we presented in this paper. In this paper analysis of the influence of dust on free space optics communication is presented. We focused our studies on Lahore as it is polluted city of Punjab and made a comparison with dust effects in Rahimyar Khan Region. Dense dust consists of large dust particles that raise from Earths sphere and whose atmospheric intensification values are high enough to affect FSO communication links. Dust storm research is based on visibility data. In order to test visibility data, we made calculations of atmospheric conditions for different dust conditions. Visibility of wave is calculated using weather spark. As it is related with the optical attenuation, so we also calculated optical attenuation of dust particles due to influence of dust particles and compared it with that of Rahimyar Khan.

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