Tesat GmbH, Backnang Köln 28. März 2003 ... · Workshop „Satellitenkommunikation in Deutschland...
Transcript of Tesat GmbH, Backnang Köln 28. März 2003 ... · Workshop „Satellitenkommunikation in Deutschland...
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
High-Tech Laser Communication Terminals
Höchste Datenraten für die Satellitenkommunikation
Workshop„Satellitenkommunikation in Deutschland“
28. März 2003Köln
Tesat GmbH, Backnang
Dr. Robert Lange
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
Warum gerade Laser Communication Terminals?
• Höhere Datenrate• Geringere Masse, geringerer Leistungsverbrauch
Figure of Merit = Datenrate / ( Masse * Leistung )
RF-Terminal0,5 Mbps / W kg @ 0,1 Gbps
Laser Terminal5 Mbps / W kg @ 10 Gbps
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
Europäische Terminals1972-2002
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
Laser Communication Terminal Evolution
Optimierung- geringere Masse, Größe- Standardbefestigung- ausschließlich elektrische Schnittstellen
SILEX 1994 (auf Spot 4)200 W, 190 kg, 50 Mbps
TELEDESIC 1998:22 kg, 7,8 Gbps
DLR-LCT 2001125 W, < 25 kg, 7,8 Gbps
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
Rationale für homodyne BPSK-Modulation(Kohärente Detektion)
1. Höchste Empfindlichkeit für Datenübertragung und Nachführung
2. Unempfindlich gegenüber Sonneneinstrahlung
3. (Costas Loop) Phasennachführung kompatibel für
digitale und analoge Systeme
4. Höchste Skalierbarkeit der Sendeleistung
jedochFrequenzstabile Laser für Phasennachführung erforderlich
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
Laser Communication Terminal, STM
TeleskopStellelemente
Front-End
Rahmenstrukturenthält alle
elektronischenund
aktiv-optischenBaugruppen
Ausrichteinheit
Masse < 25 kg Leistungsverbrauch < 125 W
ausschließlich elektrische Schnittstellen
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
TM / TC
Data
Optical Power Amplifier
Modulator
TM / TC
Modulator Driver
SystemTest
Umgebung
Front-End
Pump Module Laser Head
Pump Module (LO)
Laser Head (LO)
Laser - Sender und Laser - Empfänger für homodyne BPSK
In Umwelttests verifiziertHeat Pipe
ControlElectronics
ControlElectronics
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
Strahlungstest
Lebensdauertest
TV-Test
Vibrationstests
Laser für homodyne BPSK
In Umwelttests verifiziert
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
Hoch-zuverlässiges Pumpmodul
In Umwelttests verifiziert
Wärmerohr
Laserdioden
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
8 Gbps Datenelektronik
Weltraumtaugliches Design
Modulatortreiber ASICs der Datenelektronik
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
Front-End, mit Optischem Hybrid und Elektrischem Front End
Datenrate bis 8 Gbps• Räumliche Akquisition
• Frequenzakquisition
• Nachführung
• Demodulation
In Umwelttests verifiziert
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
-20
-16
-12 -8 -4 0 4 8 12 16 20
-20
-16
-12
-8
-4
0
4
8
12
16
20
PAA X [urad]
Tracking Error X (normalized)
BER = 10-10 @ 7,8 Gbps, -38,8 dBm ( = 6000 km Übertragungsstrecke)
Nachführung > -58 dBm
Homodyne BPSK Modulation: Leistungsfähigkeit
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
System Test Umgebung
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
• Räumliche Akquisition• Heterodyne Nachführung• Frequenzakquisition• Phasennachführung• Homodyne Nachführung• Datenübertragung
verifiziert unter In-Orbit Vibrationen
DLR-LCT Terminal Demonstrator
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
Kommerzielles Programm TELEDESIC
Tesat (ehemals Bosch Satcom)Terminal-Lieferantfür Celestri / Teledesic
7,8 Gbps @ 6000 km, BER = 10-10
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
MEDIS - Dienste mit Laser Communication Terminals
400 km
MEO10.000 km
Optische
Verbindung
BodenstationKa
-Ban
d
Ka-B
and
MEO10.000 km
operationell: Verbindung zur ISS 155 Mbps über 20.000 km, BER = 10-9
Betrieb über 10 Jahre
wissenschaftlich: Verifikation leistungsfähiger Verbindungen 2,5 Gbps über 6.000 km, BER = 10-9
Optische Verbindung
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
LCT LCT auf TerraSAR auf TerraSAR XX
SatellitenSatelliten--BodenBoden--VerbindungVerbindungIntersatellitenverbindungIntersatellitenverbindung: 5,5 : 5,5 Gbps Gbps @ 8000 km, BER = @ 8000 km, BER = 1010-9-9
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
Tesat Laser Communication TerminalsZusammenfassung
• Datenübertragung bis 10 Gbps
• Weltweit einzige Verifikation der homodynen BPSKModulation mit in Umwelttests verifizierten Baugruppen,theoretische Empfindlichkeitsgrenze bei typischerImplementation erreicht
• Weltweit erste Verifikation der Terminalbetriebsmoden inSystem Test Umgebung, Übergang von der Akquisitionbis zur Datenübertragung mit homodyner BPSKModulation
Tesat-Spacecom GmbH & Co.KG PROPRIETARY and CONFIDENTIALAuthor: P-LCT Lange Datum: 21.03.03© Tesat-Spacecom GmbH & Co.KG reserves all rights including industrial property rights and all rights of disposal such as copying and passing to third parties
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Tesat - Laser Communication Terminals
Tesat Laser Communication TerminalsAusblick
• Laser Communication Terminals qualifiziert in 2004
• In-Orbit-Verifikation in 2005
• Zugang zum kommerziellen / militärischen US-Markt