Free Space Communications

Free space optic connection is a complementary fiber optic connectivity technology. Compared with radio technology, wireless optical connection is economic, produce much wider band provides security and reduce time market acceptance. Wireless optical technology has the ability to accelerate the completion of an optical access network and brings traffic in the local network securely and reliably. Wireless optical connection is a solution "anywhere, anytime" access networks to supplement existing in any topology, with immediately income contribution. For speeds of up to 2.4 Gb/s, the transmission distance is limited to max. 5 km, and modulation can be analog or digital with transparency to any data format. Wireless optical connection flexibility allows the elimination of congestion in the access network.

 

 INSCC involvement

The main activities of research and development in the field addresses issues related to:

  • Study of communications technologies using optical wireless communication;
  • Finding solutions to modelling terrestrial atmospheric channel;
  • Models for estimating the channel attenuation and scintillation probabilistic analysis;
  • Studies concerning the use of wireless optical connection for insertion into carrier networks (backhaul);
  • Studies on the development of technologies wireless optical communication;
  • Studies on models for calculating the channel attenuation and scintillation probabilistic analysis;
  • Studies on technology fiber optic interconnection networks;
  • Study on modulation techniques in the terrestrial laser communication, time dispersion delay schemes, optical noise analysis, laser wave propagation model through the terrestrial atmosphere;

 Research projects

 Research activities carried out within INSCC in this area have generated projects like:

  • Study on wireless optical communication systems;
  • Solutions for FSO Gaussian channel modeling;
  • Survival solutions for long distance laser land-based communication.

The main results obtained in research projects on optical wireless communication:

  • Developing technologies using free space optical communication;
  • Models for calculating the channel attenuation and scintillation probabilistic analysis;
  • Interconnection technology with fiber networks;
  • Modulation techniques in the terrestrial laser communication, time dispersion delay schemes, receiver noise analysis, laser wave propagation model through the terrestrial atmosphere;

Articles in journals and conference volumes - selection :

  • FSO optical connection availability , Manea Viorel, Radu Dragomir, Dan Alexandru Stoichescu, Telecommunications, Year LVI , ISSN 2247-1863 , no. 2/2013;
  • OOK and PPM modulations effects on bit error rate in terrestrial laser transmissions , Manea Viorel Radu Dragomir, Sorin Puscoci , Telecommunications , LV, ISSN 1223-6527 ,
  • Optical flow propagation for FSO systems , Viorel Manea , Telecommunications , LV, No.2 , 2012 , ISSN 1223-6527 ;
  • Short review on modeling wave attenuation optical free-space optical links within Radu Dragomir, Puscoci Sorin Manea Viorel , ECAI , Pitesti, 2011
  • Terrestrial laser link loss budget , MANEA Viorel Radu Dragomir , Sorin Puscoci , ECAI 2011 Pitesti, 1 - 3 July 2011

Books:

  • "Modeling solutions for FSO Gaussian channel" Manea Viorel,  Radu Dragomir , Sorin Puscoci , Printech , 2013
  • "Unguided optical communication" , Radu Dragomir , Sorin Puscoci Viorel Manea, Elisavaros 2011
2011 Free space communications - inscc. Copyright © 2014 INSCC.
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