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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. 5. 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)
Additional Information:LIDO-Berichtsjahr=2003, monograph_id=5338-29,
Title:Aperture-Averaging - Theory and Measurements
Authors:
AuthorsInstitution or Email of Authors
Perlot, NicolasUNSPECIFIED
Fritzsche, DanielUNSPECIFIED
Date:2004
Journal or Publication Title:Proceedings of SPIE 2004
Refereed publication:Yes
In ISI Web of Science:No
Volume:Vol. 5
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 (old)
HGF - Program:Space (old)
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:12 Dec 2013 19:58

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