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Proceedings Paper

Evaluation of FEC for the atmospheric optical IM/DD channel
Author(s): Hennes Henniger; Florian David; Dirk Giggenbach; Christoph Rapp
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Paper 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.

Paper Details

Date Published: 3 July 2003
PDF: 11 pages
Proc. SPIE 4975, Free-Space Laser Communication Technologies XV, (3 July 2003); doi: 10.1117/12.478931
Show Author Affiliations
Hennes Henniger, German Aerospace Ctr. (Germany)
Florian David, German Aerospace Ctr. (Germany)
Dirk Giggenbach, German Aerospace Ctr. (Germany)
Christoph Rapp, Munich Univ. of Applied Sciences (Germany)


Published in SPIE Proceedings Vol. 4975:
Free-Space Laser Communication Technologies XV
G. Stephen Mecherle, Editor(s)

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