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Estimation of channel parameters and background irradiance for free-space optical link

Khatoon, Afsana and Cowley, William G. and Letzepis, Nick and Giggenbach, Dirk (2013) Estimation of channel parameters and background irradiance for free-space optical link. Applied Optics, 52 (14), pp. 3260-3268. Optical Society of America. ISSN 1559-128X.

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Abstract

Free-space optical communication can experience severe fading due to optical scintillation in long-range links. Channel estimation is also corrupted by background and electrical noise. Accurate estimation of channel parameters and scintillation index (SI) depends on perfect removal of background irradiance. In this paper, we propose three different methods, the minimum-value (MV), mean-power (MP), and maximum- likelihood (ML) based methods, to remove the background irradiance from channel samples. The MV and MP methods do not require knowledge of the scintillation distribution. While the ML-based method assumes gamma–gamma scintillation, it can be easily modified to accommodate other distributions. Each estimator’s performance is compared using simulation data as well as experimental measurements. The estimators’ performance are evaluated from low- to high-SI areas using simulation data as well as experimental trials. The MV and MP methods have much lower complexity than the ML-based method. However, the ML-based method shows better SI and background-irradiance estimation performance.

Item URL in elib:https://elib.dlr.de/82460/
Document Type:Article
Title:Estimation of channel parameters and background irradiance for free-space optical link
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Khatoon, AfsanaITR-AdelaideUNSPECIFIED
Cowley, William G.ITR-AdelaideUNSPECIFIED
Letzepis, NickDSDO-EdinburghUNSPECIFIED
Giggenbach, DirkDLRUNSPECIFIED
Date:6 May 2013
Journal or Publication Title:Applied Optics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:52
Page Range:pp. 3260-3268
Publisher:Optical Society of America
Series Name:Applied Optics
ISSN:1559-128X
Status:Published
Keywords:Free-space optical communication, Optical engineering, KNOCGOP
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Multimedia Satellitennetze
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Satellite Networks
Deposited By: Giggenbach, Dr.-Ing. Dirk
Deposited On:03 Jun 2013 11:08
Last Modified:31 Jul 2019 19:40

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