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      • Department of Electrical and Electronics Engineering
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      Turbulence simulation in diverse conditions for FSO links

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      Author
      Yüksel, H.
      Meriç, Haşim
      Date
      2012
      Source Title
      Proceedings of SPIE Vol. 8517, Laser Communication and Propagation through the Atmosphere and Oceans
      Print ISSN
      0277-786X
      Publisher
      SPIE
      Volume
      8517
      Pages
      1 - 7
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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      Abstract
      Simulation of beam propagation through turbulent media has always been a tricky subject when it comes to moderate-to-strong turbulent regimes. Creating a well controlled turbulent environment is beneficial as a fast and a practical approach when it comes to testing the optical wireless communication systems in diverse atmospheric conditions. Turbulent media is created using multiple phase screens each having controlled random variations in its frequency and power while the propagated beam is calculated using Fresnel diffraction method. The effect of the turbulent media is added to the propagated beam using modified Von Karman spectrum. Created scintillation screens are tested and compared with the experimental data which are gathered in different turbulence regimes within various atmospheric conditions. We believe that the general drawback of the beam propagation simulation is the difference in terms of spatial distribution and sequential phase textures. To overcome these two challenges we calculate the Aperture Averaging Factors to create more realistic results. In this manner, it is possible create more viable turbulent like scintillations thus the relationship between the turbulence strength and the simulated turbulence parameters are distinctly available. Our simulation gives us an elusive insight on the real atmospheric turbulent media. It improves our understanding on parameters that are involved in real time intensity fluctuations that occur in every wireless optical communication system.
      Keywords
      Aperture averaging
      Free space optical communication
      Optical wireless link
      Phase screen method
      Scintillation index Cn 2
      Simulation of turbulence
      Strong turbulence
      Permalink
      http://hdl.handle.net/11693/28120
      Published Version (Please cite this version)
      http://dx.doi.org/10.1117/12.929592
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      • Department of Electrical and Electronics Engineering 3525
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