1 recent activity on space communications projects - ets-viii, winds, and stics..- windsets-viii...

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Recent Activity on Space Communications Projects

- ETS-VIII, WINDS, and STICS ..-

WINDSETS-VIII

Nov. 13, 2008

Ryutaro SuzukiSpace Communications Group

New Generation Wireless Communications Research Center

National Institute of Information and Communications Technology

STICS

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Research Target of Space Communications

R&D History of Satellite Communication Systems

ETS-VIII project / STICS project

WINDS project

OICETS optical experiment

Reconfigurable Repeater development


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Broadband Satellite Communication systems•High speed multimedia services to home•Solving digital divide, Disaster communication

Mobile Satellite Communications in any time and any place•ETS-VIII, Quasi-GEO

Advanced Research for future broadband communications•High speed optical communications•Testing advanced technology in orbit just on time•GEO-Platform system

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1950s 1960s 1970s 1980s 1990s 2000s

Start of Satcom R&D in Japan

Tokyo Olympic

Vide Transmission

1964

ATS-11966

CSFirst National Com. Sat.

Dec. 1977

CS-2,CS-3Promotion of commercial use of sat.

JCSAT

CommercialService

Mar. 1989Superbird

Feb. 1992

WINDS Construction of a base for space information communications

ETS-VMobileSatcom

Aug. 1987

Commercial Service

N-STAR

ETS-VIPersonnel comm.

Aug. 1994

FutureSystems

COMETSAdvanced Mobile

Feb. 1998

ETS-VIIIPersonal Com.

BSFirst

Domestic Broadcast

Sat.

Apr. 1978

Commercial TV Service

BS-2

Expansion of Services

BS-3

COMETSAdvanced Broadcast

Feb. 1998

ETS-VIII

Digital Audio

2006

High altitude /high quality

World's first artificial sat.

Sputnik-1

Oct. 1957

ETS-VIInter-satellitecommunication

Aug. 1994

ETS-VIINov. 1997

Feb. 23, 2008

Dec. 18, 2006

Ultra high-speed optical communications

Ultra high-speedInternet Sat.

Space Highway

From

Mobileto

Personal

AdvancedBroadcast

Sat.-to-sat.space link

Cluster Sat research

Orbital remote inspectionNew space communication infrastructureFormation flight

Geostationary platform

Quasi-Zenith Sat.High altitude communications

High precision positioning

LEO System

NeLSGlobal Communications

OICETSLaser Com.

G-bitLaser Satcom

DRTSSep. 2002

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WINDS project




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Engineering Test Satellite VIII (ETS-VIII) 3 ton class satellite bus technology

S-band deployable large reflector

Advanced mobile Satellite Communications experiments: On-board Switch

Ranging and Positioning experiment: High Accuracy Clock

3 beams are installed in ETS-VIII

Launched on Dec.18, 2006

#1#2

#3#4

#5

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Service Image of Advanced Mobile Communication

Phased array feeder for large reflector antenna Onboard Signal Processor

Satellite Phone

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Ka Feeder Link Satellite Onboard Switch

BFN & PS

Malfunctions

LNA Power Line Harness

S-band

Feeder Link

NICT

JAXA

NTT

Ka-bandD/C

High Accuracy Time Exchange

Reflector13 m

Phased Array Feeder

PIM-LNA

・・・

S-band

ServiceLink

・・・

High Accuracy Freq. Standard

High Accuracy Clock / RF unit L/S-band

HAC Antenna1 m

S-bandU/C, D/C

Data ModeTRX

Voice ModeTRX

RX BFN2

RX BFN1

LNA PS

LNA31

units

SW

TX BFN2

TX BFN1SW

Ka LNA

Ka TWTA

SSPA31units

Block diagram of ETS-VIII

Ka-band Antenna ( 0.8 m)EIRP < 46 dBWG/T < 14 dBK

S-band Backup Rx-antenna (1m )G/T < -6 dBK

S-band Tx-antenna ( 13 m)EIRP < 63.8 dBW

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• Ka-band feeder link earth station• S-band fixed station• S-band mobile earth station• Telemetry/Command system

Ka-band feeder link earth station (antenna) Ka-band feeder link earth station (RF section)

S-band phased array antenna for automobiles

Development of ground testing devices

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Handheld Terminal for Voice Communication for ETS-VIII

Size: 58 mm (W) x 170 mm (D) x 37.5 mm (H) Weight:: 266 g (without battery)

Because of LNA trouble of ETS-VIII, additional high gain transmission antenna should be needed to perform the experiments using Handheld terminals.

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Uplink Improvement by using Digital Repeater Unit

EIRP: 0.2 dBW

G/T: -27.5 dB/K

7 dBi (Patch Antenna)

60 cm Parabolic Antenna

Gain: 21.5 dBiEIRP: 29.0 dBW

G/T: -7.3 dB/KAntenna Gain: 21.3 dBi

HAC Antenna (RX)

NICT Handheld Terminal

Digital Repeater Unit

ETS-VIII uplink trouble was recovered by developing a digital repeater unit which receive the signal from the Handheld terminal and re-transmit to ETS-VIII by using 60 cm antenna.

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DVB-SH Transmission Experiment by ESA

ETS-VIII

DVB-SH signal

Satellite / Terrestrial Integration Experiment was carried out by using ETS-VIII.

Base stations were installed in NICT, Sky Tower, and JVC factory.

Sky Tower

NICT Kashima

NICT Koganei

JVC Hachioji factory Mobile Test Van

S-band

Ku-band Ka-band

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R&D of STICSR&D of STICS （（ Satellite/Terrestrial Integrated mobile Communication SystemSatellite/Terrestrial Integrated mobile Communication System ））

The cellular phone doesn‘t reach in the mountainous area, the island, and the sea.

Moreover, the cellular phone cannot occasionally be used because of the disasters such as earthquakes and typhoons by the damage of the base stations.

In NICT, new R&D of the satellite/terrestrial integrated mobile communication system is started which is effective even at such situations.

This system is called STICS (Satellite/Terrestrial Integrated mobile Communication System)

Communication is available both

via satellite

via terrestrial

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Technological Study Items of STICS

Satellite gateway

Dynamic network control

equipment

Service LinkGeostationary

Satellite

Ground cellFeeder

Link

Terrestrial gateway

Hotspot

WLANbase

station

Network

Satellite Cell

Terrestrial base

station

Technological itemsTechnological items

1. Frequency sharing technology between satellite and terrestrial systems

• Cooperative frequency control technology

• Dynamic network control technology

1. Frequency sharing technology between satellite and terrestrial systems

• Cooperative frequency control technology

• Dynamic network control technology

2. Interference avoidance and frequency allocation technology between satellite and terrestrial systems

• Anti-saturation amplifier technology• Low sidelobe technology• Super multi beam forming technology• Resource allocation technology

2. Interference avoidance and frequency allocation technology between satellite and terrestrial systems

• Anti-saturation amplifier technology• Low sidelobe technology• Super multi beam forming technology• Resource allocation technology

Base Stations

for feeder link

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R&D for frequency sharing technology between satellite and terrestrial systems

Frequency sharing technology

Cooperative frequency control technology Dynamic network control technology

Technology to improve the channel capacity, which control the communication resource* between satellite and terrestrial systems dynamically according to traffic distribution and variation.

Network technology to control the resource dynamically and unity depend on the traffic between satellite and terrestrial systems.

*communication resource, frequency, time, power and space

1710 22001750 1800 1850 1900 1950 2000 2050 2100 2150

IMT-2000 IMT-2000 IMT-2000

MSS: Mobile Satellite Services UP Down1980 2010 2170 2200

MHz

Service link

MSS MSS

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R&D for Interference avoidance and frequency allocation technology between satellite and terrestrial systems

Anti-Saturation amplifier technologyLow sidelobe technologySuper multi beam forming technologyResource allocation technology

f4f3

f2

f1

メインフレーム

Network

メインフレーム

Satellite control equipment

Terrestrial control equipment

Terrestrial base station

Feeder link station

Satellite

Terrestrial cell

oror

Desired satellite cell

Beam pattern of desired

satellite cell

TerminalBase

stationTerrestrial terminal

Base station

Satellite terminal

Adjacent satellite cell

Satellite (GSO)

Same frequency interference from

terrestrial system at adjacent satellite cell

Space guard band

Same frequency interference from

terrestrial system at adjacent satellite cell

Desired wave

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WINDS project




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Features of WINDS 1.2 Gbps high speed satellite communication 155 Mbps broadband satellite communication for home Wide service area: Asia and Pacific region

To resolve digital divide Contribution to digital divide 0% in Japan Contribution to resolving digital divide in Asia and Pacific region

Disaster management satellite communication Back up of backbone (1.2Gbps) High definition image transmission from disaster area using portable

USAT (antenna size : 45cmφ) Multicast service

SHV (Super High Vision) distribution Telemedicine e-learning

Purpose of WINDS

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Wideband InterNetworkingengineering test and

Demonstration Satellite

- Broadband satellite network1.2 Gbps/beam (bent-pipe)155 Mbps/beam (regenerative)

- Inter-connection with terrestrial broadband networks

- Broadband & high power transponder- Ka-band active array antenna- On-board high speed switching and routing

Providing emergencyback-up link

Multimediamulticast service

Long-haul, thinroute linking

Temporary linking

WINDS broadband satellite communication experiments

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History of The WINDS

Gigabit Satellite R&DGigabit Satellite R&D

- Expansion of Broadband Networks

- Collaborations among Asia-Pacific nations

- Contribution to disaster mitigation

- Expansion of Broadband Networks

- Collaborations among Asia-Pacific nations

- Contribution to disaster mitigation

R&D of key technologies

- Onboard processing & switching

- Scanning spot beam antenna

R&D of key technologies

- Onboard processing & switching

- Scanning spot beam antenna

- Development of new technology verification

- Application demonstrations

- Development of new technology verification

- Application demonstrations

WINDSWINDS

Key technology development

- Onboard switch (ABS)

- Active phased array antenna (APAA)

- Multi-port amplifier (MPA)

- High speed burst modem

Key technology development

- Onboard switch (ABS)

- Active phased array antenna (APAA)

- Multi-port amplifier (MPA)

- High speed burst modem

CRL (1996 - )CRL (1996 - ) JAXA/NICT (2002 - )JAXA/NICT (2002 - )

Ka-band Scanning Spot Beam Antennas

On-board Switch

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Development Schedule of The WINDS

Launched on Feb. 23, 2008

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Unique Features of The WINDS

Very high data rate Wide bandwidth (1.1 GHz) High power multi-port amplifier (MPA) High gain spot beam antenna Very high data rate burst modem

Flexible and wide coverage Active phased array antenna (APAA) Fixed multi-beam antenna (MBA)

Rain attenuation compensation Flexible power allocation by MPA

Internet connectivity Advanced baseband switch (ABS)

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External view of WINDS

Multi-beam antenna reflectorfor domestic coverage (2.4 m)

Multi-beam antenna reflectorfor S.E. Asia coverage (2.4 m)

2.4- ton satellite bus

Ka-band active phasedarray antenna (APAA)

Rx APAATx APAA

650mm 540mm

470mm

290mmAPAA

Total EIRP:54.6 dBW (1-beam transmission)52.1 dBW (2-beam transmission)

G/T: 7.1 dB/K

by courtesy of JAXA

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Fixed beams cover Japan and several South East Asian areas.APAA Scanning beams cover almost all areas visible from WINDS.`

qqqqqqqqqqqqqq =0

APAA beam scanning area

: Fixed beams by MBA

: Scanning beams by APAA

Coverage of WINDS

Hawaii can be covered by using APAA

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Ground Terminals / Data Communication Rate

※ ： by NICT

Bent-pipe

~622Mbpsx21.2 Gbps

Bent-pipe~622Mbps

LET >5m

SDR-VSAT 2.4m

USAT 45cm

ABS ＊

DEM/ATMS/MOD

D/LWINDSU/L

HDR-VSAT 1.2m

USAT 45cm

1.5 - 6Mbps

155Mbps1.5~155Mbps

155Mbps

SDR-VSAT 2.4m

LET >5m

HDR-VSAT 1.2m

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High-speed network earth stations

SDR-VSAT: Super high data rate-VSAT

SDR-VSAT4.8 m antenna of LET

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Results of 622 Mbps transmission test

1.0E-10

1.0E-09

1.0E-08

1.0E-07

1.0E-06

1.0E-05

1.0E-04

1.0E-03

1.0E-02

1.0E-01

4 6 8 10 12 14 16

Eb/No [dB]

Bit

Err

or R

ate

LET=>LET (BPFU1)LET=>LET (BPFU2)SDRVSAT=>SDRVSAT (BPFU2)SDRVSAT=>SDRVSAT (BPFW1 Upper)SDRVSAT=>LET (BPFW1 Upper)SDRVSAT=>LET (BPFW1 Lower)TRL-loopback Upper (Ground test)TRL-loopback Lower (Ground test)BPF-U1 (Ground test)BPF-W1 Upper (Ground test)BPF-W1 Lower (Ground test)

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Experiment plan using WINDS

• Basic Experiments– Satellite developing organization (JAXA and NICT)

plans and carry out

• Application Experiments– MIC invited public proposals– 53 experiments were adopted

(30 international experiments)• Tele-medicine, E-learning, Propagation, etc

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Trunk Line Connection Experiment with Terrestrial Network

WINDS

High speed satellite link (1.2Gbps) is connected with terrestrial network and use as backbone link.

Technical purposeTo verify the compatibility between terrestrial IP network and satellite link (to examine the countermeasure against the degradation of throughput due to delay in the satellite link)

1.2Gbps high speed satellite link is connected with terrestrial network and is used as backbone link.

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Access Link Connection Experiment with Terrestrial Network

Interface equipment

INETERNET

USAT （base sation）(45cm antenna)

USAT（base station）(45cm antenna)

Assuming the disaster, users connect to USAT via wireless LAN and communicate with Internet using WINDS.

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NHK’s Super High Vision transmission experiment

This experiment uses the maximum performance of 1.2Gbps by using bent-pipe transponder.

The data rate of SHV (Super High Vision) is 16 times ( 4 x 4 ) of normal high definition video images. The raw data rate of SHV is 24Gbps.→The SHV signal is compressed to 150~1,000 Mbps for transmission.

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WINDS project




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Multi-10 Gbps class optical space communications Quantum Communication experiment between ISS and Ground stations Inter satellite link ( GEO - LEO, LEO – LEO ) High speed feeder link for satellite communications

Mechanical Tracking Equipment

Laser Tracking Trial for Optical Comm. using HAPS

Optical Space Communications (Research phase)

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NICT OGS

Wavelength: 800 nm-bandOutput power at aperture - OGS: 10mW - OICETS: 53mW

Optical terminal

OICETS(Kirari)

OICETS - Ground Laser Communication Experiments

Optical communication experiments between OICETS and NICT Optical Ground Station (OGS) were conducted in 2006 and 2008.

To improve uplink and downlink performance under atmospheric turbulence, LDPC coding technology with multi-beam transmission are employed.

Photo of uplink/downlink

Laser communications

Laser from OICETS

Laser from NICT OGS

Moon

Beam width of the OICETS laser is around 5 m.

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WINDS project




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Objectives of SDR type Transponder (Research phase)

1. Technological demonstration of onboard software-defined radio system– Versatile onboard modulator and demodulator (MODEM) with SDR technique.– application proof of highly functional onboard transponder. – application proof for next-generation communication satellite.– Adaptable to latest communications technology with flexible link design and

high data rate.

2. Gracefully degradable equipment with functional redundant technique– Reliability enhancement of onboard MODEM with software-defined radio

flexibility.– Introducing a soft fault decision process (multilevel, not “hard decision”) for

extending mission equipment lifetime (autonomous fault decision and resource evaluation).

– Reducing redundancy by assigning a light load to partially “out of order” equipment with taking account of a required computational complexity disequilibrium in an onboard MODEM.

3. Test bed in Orbit– The architecture and the information for the OSDR programming will be

opened.

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“TDMA”: Time Division Multiple Application

• All in one with RECONFIGURATION

Mesh type connectionBaseband switching and

Regenerative relay

Broadcasting, One way star type

Emergency communication systemOnboard Web server systemLayer 3 switching + onboard PEP

“Adaptive communication”mod/demod, codec, protocol

and termination layer

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Conclusions

NICT R&D items

• Development of the Gbps-class ultra-high speed satellite communications system

• Development of next-generation mobile communications

• Research of the millimeter wave / optical high-speed transmission system

• Research of the fundamental technologies to improve reliability and/or flexibility of satellite communications systems

Projects

WINDS development

ETS-V, ETS-VIII developments STICS project

ETS-VI, COMETS: millimeter OICETS optical experiment


1 recent activity on space communications projects - ets-viii, winds, and stics..- windsets-viii...

Documents

intersatellite communication

place ets

space highway

space link cluster

advanced technology

commercial service nstar

engineering test satellite

quasigeo advanced research