Evaluation of FEC for the atmospheric optical IM/DD channel

Hennes Henniger; Florian David; Dirk Giggenbach; Christoph Rapp

doi:10.1117/12.478931

3 July 2003 Evaluation of FEC for the atmospheric optical IM/DD channel

Hennes Henniger, Florian David, Dirk Giggenbach, Christoph Rapp

Proceedings Volume 4975, Free-Space Laser Communication Technologies XV; (2003) https://doi.org/10.1117/12.478931
Event: High-Power Lasers and Applications, 2003, San Jose, CA, United States

Abstract

Channel measurements were performed by the German Aerospace Center in various near ground optical channels including a 1.5 km horizontal path as well as a 61km path. These measurements clearly showed that the atmosphere causes very slow fading (compared to the high data rates usually used in optical communication systems), which significantly degrades the transmission quality. As transmitter power and receiver sensitivity are limited by the transmission technology, fading depicts a severe problem, that can be reduced by the use of forward error correction schemes (FEC) in order to improve system performance. Therefore FEC was subject of investigations by means of simulations. To figure out which FEC methods are useful for applications in the atmospheric optical channels simulations of standard block codes and interleavers have been done. They were based on data sets taken in the various channel measurements. The simulations point out that only very long interleaving can increase performance significantly.

Citation Download Citation

Hennes Henniger, Florian David, Dirk Giggenbach, and Christoph Rapp "Evaluation of FEC for the atmospheric optical IM/DD channel", Proc. SPIE 4975, Free-Space Laser Communication Technologies XV, (3 July 2003); https://doi.org/10.1117/12.478931

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