Power series based gamma–gamma fading MIMO/FSO link analysis with atmospheric turbulence and pointing errors

2021 ◽  
Vol 53 (9) ◽  
Author(s):  
D. Anand Kumar ◽  
R. G. Sangeetha
Keyword(s):  
Power Series ◽  
Atmospheric Turbulence ◽  
Link Analysis ◽  
Pointing Errors

Composite Fading Model for Aerial MIMO FSO Links in the Presence of Atmospheric Turbulence and Pointing Errors

2021 ◽  
pp. 1-1
Author(s):  
Haitham S. Khallaf ◽  
Kazutoshi Kato ◽  
Ehab Mahmoud Mohamed ◽  
Sadiq M. Sait ◽  
Halim Yanikomeroglu ◽  
...  
Keyword(s):  
Atmospheric Turbulence ◽  
Pointing Errors ◽  
Composite Fading

Pointing errors effect on fiber coupling efficiency for Gaussian-beam wave through atmospheric turbulence channel in FSO links

2019 ◽  
Vol 435 ◽  
pp. 183-189 ◽  
Author(s):  
Gaoyuan Lu ◽  
Jing Ma ◽  
Chao Zhai ◽  
Siyuan Yu ◽  
Liying Tan ◽  
...  
Keyword(s):  
Gaussian Beam ◽  
Atmospheric Turbulence ◽  
Coupling Efficiency ◽  
Beam Wave ◽  
Fiber Coupling ◽  
Pointing Errors

Non-Adaptive Decision Thresholds for Gain Saturated FSO Links Limited by Weak to Strong Turbulence and Pointing Errors

2020 ◽  
Vol 46 ◽  
pp. 63-75
Author(s):  
Jeremiah Oluwatosin Bandele ◽  
Moses Oluwafemi Onibonoje ◽  
Abisayo O. Aladeloba
Keyword(s):  
Atmospheric Turbulence ◽  
Communication Systems ◽  
Threshold Level ◽  
High Gain ◽  
Decision Threshold ◽  
Free Space Optical ◽  
Pointing Errors ◽  
Strong Turbulence ◽  
Simulation Techniques ◽  
Amplified Spontaneous Emission Noise

In free space optical (FSO) communication systems limited by atmospheric turbulence, the use of non-adaptive decision thresholds to determine the transmitted bits results in bit error rate (BER) floors at high BER values in all turbulence regimes. Practically implementing an adaptive decision threshold that can properly track the fluctuations due to atmospheric turbulence is challenging, therefore, devising ways of optimising the non-adaptive decision threshold used by FSO designers is necessary. In this paper, the investigation of gain saturated pre-amplified FSO communication systems using non-adaptive decision thresholds in the presence of atmospheric turbulence, pointing errors (PEs), geometric spread (GS) and amplified spontaneous emission noise is carried out by applying analytical methods and Monte Carlo (MC) simulation techniques. System performance is carried out for various turbulence regimes, normalised beam widths, normalised PE standard deviations and small signal gains using fixed gain and gain saturated optical amplifiers (OAs). Results obtained show that in the presence of atmospheric turbulence, PE and GS, optimal BER performances are obtained with OA input powers higher than the internal saturation power of the OA. Also, by using high gain OAs and varying the decision threshold level, acceptable BER performances can be obtained in strong turbulence regimes with a non-adaptive decision threshold.

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