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Aperture-Averaging - Theory and Measurements
Perlot, Nicolas and Fritzsche, Daniel (2004) Aperture-Averaging - Theory and Measurements. In: Proceedings of SPIE 2004, Vol. 5338. Free-Space Laser Communication Technologies XVI, 2004-01-27 - 2004-01-29, San Jose, California, USA.
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Abstract
Atmospheric laser communications using direct-detection systems do suffer from severe degradation caused by scintillation. Because the atmospheric cut-off frequency can be as low as 100 Hz, temporal averaging is not applicable in high-speed communications. The simplest way of reducing fading is to increase the receiver size and to take advantage of aperture averaging. Spatial and temporal variations of the received intensity have to be investigated in order to predict the efficiency of aperture averaging. This paper reviews briefly the theory of spatial averaging that characterizes the direct-detected optical power. For comparison purposes, results of measurements are presented. These measurements consist of recorded pupil intensity patterns for a scenario with known turbulence profile. Statistics derived from measurement data are compared with theoretical second-order statistics.
| Document Type: | Conference or Workshop Item (Paper) | ||||||
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| Additional Information: | LIDO-Berichtsjahr=2003, monograph_id=5338-29, | ||||||
| Title: | Aperture-Averaging - Theory and Measurements | ||||||
| Authors: |
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| Date: | 2004 | ||||||
| Journal or Publication Title: | Proceedings of SPIE 2004 | ||||||
| Refereed publication: | Yes | ||||||
| In ISI Web of Science: | No | ||||||
| Volume: | Vol. 5338 | ||||||
| Status: | Published | ||||||
| Keywords: | Free-Space, Optical Communication, Aperture-Averaging, KNOCGOP | ||||||
| Event Title: | Free-Space Laser Communication Technologies XVI | ||||||
| Event Location: | San Jose, California, USA | ||||||
| Event Type: | international Conference | ||||||
| Event Dates: | 2004-01-27 - 2004-01-29 | ||||||
| Organizer: | SPIE - The International Society for Optical Engineering | ||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||
| HGF - Program: | Space | ||||||
| HGF - Program Themes: | W KN - Kommunikation/Navigation | ||||||
| DLR - Research area: | Space | ||||||
| DLR - Program: | W KN - Kommunikation/Navigation | ||||||
| DLR - Research theme (Project): | W - Vorhaben Multimedia Satellitennetze (old) | ||||||
| Location: | Oberpfaffenhofen | ||||||
| Institutes and Institutions: | Institute of Communication and Navigation > Digital Networks | ||||||
| Deposited By: | elib DLR-Beauftragter | ||||||
| Deposited On: | 16 Sep 2005 | ||||||
| Last Modified: | 14 Jan 2010 13:23 |
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