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Evaluation of the Scintillation Loss for Optical Communication Systems with Direct Detection

Perlot, Nicolas (2006) Evaluation of the Scintillation Loss for Optical Communication Systems with Direct Detection. Optical Engineering, 46 (2), .

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Kurzfassung

In optical communications through the atmosphere, the evaluation of a link feasibility often requires the quantification of the scintillation penalty in terms of power loss. To find how much additional optical power is needed to reach the bit-error-rate (BER) requirements, the optical-power fluctuations must be characterized as well as the response of the receiver to those fluctuations. In the present analysis, the directdetected optical power is assumed to be either lognormal or gammagamma distributed. To account for the dynamics of the atmospheric channel, a distinction is made between short-term and long-term BERs. For a simple On-Off Keying (OOK) modulation, expressions of scintillation losses are given for different system requirements. Specifically, an upper bound is set to any of the three following quantities: the long-term BER, the probability of having a too-high short-term BER, or the mean time during which the short-term BER is too high. Results show that, without any fade mitigation, losses under moderate scintillation are considerable. Finally, a simple code-word approach shows how scintillation losses can be reduced by channel coding.

Dokumentart:Zeitschriftenbeitrag
Titel:Evaluation of the Scintillation Loss for Optical Communication Systems with Direct Detection
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Perlot, NicolasNICHT SPEZIFIZIERT
Datum:2006
Erschienen in:Optical Engineering
Band:46
Seitenbereich:
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
SPIE-The International Society for Optical Engineering, NICHT SPEZIFIZIERT
Status:veröffentlicht
Stichwörter:free-space optics, scintillation loss, IM/DD systems, short-term BER, long-term BER, channel coding, KNOCGOP
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W KN - Kommunikation/Navigation
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W KN - Kommunikation/Navigation
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Multimedia Satellitennetze (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Kommunikation und Navigation > Digitale Netze
Hinterlegt von: Dr. Nicolas Perlot
Hinterlegt am:07 Sep 2007
Letzte Änderung:12 Dez 2013 20:20

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