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Discussion of the Direct Detection Rx-power Distribution as derived from Intensity Statistics and Comparision with Measurements

Perlot, Nicolas and Giggenbach, Dirk and Bischl, Hermann and David, Florian (2003) Discussion of the Direct Detection Rx-power Distribution as derived from Intensity Statistics and Comparision with Measurements. In: Proceedinges of the SPIE, Vol. 4976. LASE 2003, Atmospheric Propagation , San Jose, California, USA, 25�31 January 2003, San Jose, California (USA).

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Abstract

The intensity of a laser beam after propagation through turbulent media such as the atmosphere may follow different probability density functions (PDFs) depending on the fluctuation regime. For non-coherent receivers the aperture averaging effect reduces the power scintillation leading to a different PDF. Since the analytical approach of deriving the received power PDF knowing the joint-PDF of the intensity at more than just a few points becomes rapidly complex, we review here a much more simplified approach as well as a simulative approach. Both approaches are based on the results of scintillation theory. First, starting from the PDF of the intensity and its spatial correlation, aperture sub-areas can be defined over which the intensity is assumed equal and independent from other sub-areas' intensity. Under those conditions the power PDF is easily worked out. The validity of this method is evaluated according to the level of spatial correlation of the intensity. In a second method, intensity variables are sampled from the Rx-aperture and an approximation of the power PDF is obtained by generating multivariate correlated intensity values. Weak and strong fluctuation regimes are treated separately and the effects of different resolution of the input-intensity-field are discussed. In addition, this paper compares the predicted power characteristics to those deduced from experimental data where the intensity characteristics (PDF, spatial correlation) have been evaluated.

Document Type:Conference or Workshop Item (Paper)
Additional Information:LIDO-Berichtsjahr=2003,
Title:Discussion of the Direct Detection Rx-power Distribution as derived from Intensity Statistics and Comparision with Measurements
Authors:
AuthorsInstitution or Email of Authors
Perlot, NicolasUNSPECIFIED
Giggenbach, DirkUNSPECIFIED
Bischl, HermannUNSPECIFIED
David, FlorianUNSPECIFIED
Date:2003
Journal or Publication Title:Proceedinges of the SPIE, Vol. 4976
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:Optical Free Space Transmission, Direct Detection, Rx-Power Distribution, Intensity Statistics
Event Title:LASE 2003, Atmospheric Propagation , San Jose, California, USA, 25�31 January 2003
Event Location:San Jose, California (USA)
Event Type:international Conference
Organizer:SPIE - The International Society of 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: Dr.-Ing. Dirk Giggenbach
Deposited On:10 Aug 2006
Last Modified:12 Dec 2013 19:58

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