Title :
Simulation of coding for atmospheric optical channel
Author :
Kolka, Zdenek ; Biolkova, Viera ; Biolek, Dalibor ; Horak, Martin
Author_Institution :
Brno Univ. of Technol., Brno
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;
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
