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Evaluation of Communication Performance For Adaptive Optics Corrected Geo-To-Ground Laser Links

Canuet, Lucien and Vedrenne, Nicolas and Conan, Jean-Marc and Artaud, Géraldine and Rissons, Angélique and Lacan, Jérôme Evaluation of Communication Performance For Adaptive Optics Corrected Geo-To-Ground Laser Links. (2017) In: International Conference on Space Optics (ICSO 2016), 18 October 2016 - 21 October 2016 (Biarritz, France).

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Abstract

For future GEO to ground communications link, very high throughput might be achievable at a reasonable cost assuming the use of existing single mode components developed for fiber technologies (optical detectors and amplifiers, MUX/DEMUX...). The influence of atmospheric turbulence degrades the injection efficiency of the incoming wave into single mode components. This leads to signal fading and channel impairments. Several mitigation strategies are considered to prevent them. The use of adaptive optics should contribute to reduce substantially the criticality of the fading at the expense of potentially complex and expensive systems if very high stability of the injection is requested. The use of appropriate interleaving can help to relax the specifications and cost of AO systems but could lead to unmanageable buffer size. Thus the specification of AO correction and interleavers should be addressed jointly. An analytical model to evaluate the channel capacity in terms of outage probability and packet error rate has been developed that jointly takes into account partial correction by AO and channel interleaving. The influence of partial correction is inferred from statistical and temporal properties of the corrected wavefront that are explicitly related to injection efficiency. Among others an analytical evaluation of the mean fading time is provided. Interleaving is taken into account with a block fading model. This model is presented here and confronted to numerical simulations for two distinct correction cases. The accuracy of the model is discussed. The interdependence of AO correction with interleaving is investigated.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National d'Études Spatiales - CNES (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
French research institutions > Office National d'Etudes et Recherches Aérospatiales - ONERA (FRANCE)
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Deposited By: Jérôme Lacan
Deposited On:30 Jan 2017 12:27

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