scholarly journals Exact distributions for bit error rate and channel capacity in free-space optical communication

2019 ◽  
Vol 13 (18) ◽  
pp. 2966-2972
Author(s):  
Santosh Kumar ◽  
Rajeev Kumar Singh ◽  
Karmeshu
Keyword(s):  
Channel Capacity ◽  
Optical Communication ◽  
Bit Error Rate ◽  
Error Rate ◽  
Free Space ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Exact Distributions ◽  
Space Optical Communication

Improve the Bit Error Rate Performance of Free Space Optical Communication due to Atmospheric Turbulence Effect through the Robust Modulation

2014 ◽  
Vol 699 ◽  
pp. 942-947 ◽  
Author(s):  
A.K. Rahman ◽  
S.A. Aljunid ◽  
M.S. Anuar ◽  
H.A. Fadhil
Keyword(s):  
Atmospheric Turbulence ◽  
Optical Communication ◽  
Bit Error Rate ◽  
Error Rate ◽  
Free Space ◽  
Scintillation Index ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Space Optical Communication ◽  
Turbulence Effect

This paper focus on improvement bit error rate (BER) performance due to atmospheric turbulence effect in free space optical communication (FSOC) using new modulation technique that is dual diffuser modulation (DDM) technique. This technique uses two transmitter and differential mode detection at the receiver. The combination of dual diffuser with differential detection mode at receiver produce the superior modulation against the turbulence especially reducing the scintillation index, overcome the signal detection with fix zero threshold and improve the power received. These three element factors are important in order to improve the overall performance of free space optical system. The analysis result shows that under strong turbulence condition, the BER can improve 42 percent in term of FSO distance propagation.

scholarly journals Performance Analysis of Free Space Optical Communication System Under Rain Weather Conditions: A Case Study for Inland and Coastal Locations of India

2021 ◽  
Author(s):  
Harjeevan Singh ◽  
Nitin Mittal
Keyword(s):  
Attenuation Coefficient ◽  
Optical Communication ◽  
Bit Error Rate ◽  
Error Rate ◽  
Free Space ◽  
Weather Conditions ◽  
Coastal Areas ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Space Optical Communication

Abstract This work aims to investigate the performance of Free Space Optical Communication link under average and worst rain weather conditions of India. The meteorological data related to rainfall, from 2014 to 2017, was obtained from the Indian Meteorological Department for six different locations of India, representing the inland and coastal areas. The attenuation coefficient due to rain for all the locations has been calculated using mathematical models. The performance analysis of Wavelength Division Multiplexing based Free Space Optical Communication system has been analyzed, by incorporating the attenuation due to rain for all considered locations, in terms of received power, signal to noise ratio, bit error rate and eye diagrams. The inland location of Hyderabad has given the best results in terms of above mentioned parameters as it has recorded minimum average rainfall of 2.35 mm/hr with minimum attenuation coefficient of 1.91 dB/km and can support a link range of 5.43 km, corresponding to bit error rate of order of 10-9 under average rain weather conditions. On the other hand, the average rainfall is maximum for the coastal area of Mumbai with a value of 7.31 mm/hr, resulting in maximum attenuation coefficient of 4.08 dB/km and the maximum link range is limited to 3.48 km, corresponding to bit error rate of order of 10-9 under average conditions of rain weather. Similarly, the inland locations of India have delivered a better link performance as compared to coastal areas under worst rain weather conditions also. So it has been concluded that the coastal areas of India have shown major degradation in the performance of the FSOC link as compared to inland locations of the country.

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