Simulation of coding for atmospheric optical channel

Author

Kolka, Zdenek ; Biolkova, Viera ; Biolek, Dalibor ; Horak, Martin

Author_Institution

Brno Univ. of Technol., Brno

fYear

2008

fDate

17-19 Oct. 2008

Firstpage

35

Lastpage

40

Abstract

The paper deals with coding for terrestrial free-space optical links that are characterized by outages in the order of tens of milliseconds. For high transmission rates the optical channel can be simply modeled as a slowly varying AWGN channel. The paper provides a simple framework for FSO channel modeling in the time domain, using samples of power received from a real link or generated by a turbulence model. Simple formulae for transforming the model for different link parameters are provided. The proposed coding scheme is based on a combination of error correction of individual packets and the LDGM code for mitigating short link fades. Data for simulation were obtained from a real 7 km link.

Keywords

AWGN channels; atmospheric optics; atmospheric turbulence; channel coding; error correction codes; optical links; time-domain analysis; AWGN channel; FSO channel modeling; LDGM code; atmospheric optical channel; error correction; terrestrial free-space optical link; time domain; turbulence model; Atmosphere; Atmospheric modeling; Biomedical optical imaging; Meteorology; Optical attenuators; Optical receivers; Optical scattering; Optical transmitters; Paper technology; Space technology; Free-Space optics; channel coding; simulation; unidirectional links;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Signals and Coding, 2008. MIC-CSC '08. Proceedings of the Mosharaka International Conference on

Conference_Location

Amman

Print_ISBN

978-9957-486-05-1

Type

conf

Filename

5073938