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Aeronautical Ku-band Satellite Communication Single Focus Workshop 25 March 2010. Peter Lemme. KU Band. Formed in Dec 2007 ARINC 791 Part 1: Provisions (form and fit) March 2011 Part 2: Protocols (function) March 2012. Ku-band Technical Working Group. Airlines

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Presentation Transcript
ku band technical working group
Formed in Dec 2007

ARINC 791

Part 1: Provisions (form and fit)

March 2011

Part 2: Protocols (function)

March 2012

Ku-band Technical Working Group
working group participants
Airlines

Delta, Lufthansa, KLM

Airbus and Boeing

Antenna, Radome, KRFU, KANDU

TECOM, Cobham, AeroSat, EMS, Viasat, ThinKom, QEST, Starling

Components

EMS, Rockwell Collins,ITS Electronics, Gore, COMDEV, Tyco, Saint-Gobain, Souriau

Service Provider (ModMan, Space Segment, Internet Gateway, Billing, Operations)

Panasonic, Row 44

Others

DDEi, AEEC, Aircell

Working Group Participants
ku band satellite
Geo-Stationary Orbit (GSO)

Multiple transponders for full or partial lease

Each transponder is 36-72 MHz wide

Single transponder can cover a whole continent

Most coverage over populated regions

Designed for 0.8 to 1.2 meter fixed terminal

Terminal transmit 13.75 to 14.50 GHz

Terminal receive 10.7 to 12.75 GHz

Ku-band Satellite
interference
Transmission power spectral density under strict limits from two degrees of the target satellite

Antenna transmit beamwidth most critical factor for compliance

Aero antennas may not comply in some conditions

Spread Spectrum

Reduce EIRP

Interference
transmit limitations
GSO Beamwidth

Skew angle

EIRP

Achieved beam steering accuracy

Spreading factors and modulations

Other interference considerations

Radio Astronomy

Non-GSO operators

Transmit Limitations
data link efficiency
Spectral Efficiency (bps per Hz)

Modulation, Coding, Spreading

As high as 1.0 under favorable scenarios

Typical efficiency perhaps 0.3

Less then 0.1 under demanding scenarios

Data Link Efficiency
data rates
Received at the airplane

Forward Channel

Single transponder 10 to 50 Mbps (shared)

May receive multiple transponders for nearly limitless bandwidth

Transmitted from the airplane

Return Channel

Single Channel

Data rates typically 64 kbps to 1 Mbps

Data Rates
aircraft antenna installation
Two frame spacings

Seven fittings

32” to 37” swept volume

10” to 12” radome height

Aircraft Antenna Installation
regulatory
Aeronautical Mobile Satellite Service (AMSS)

ITU S.728-1 (psd)

ETSI EN 301 428 V1.3.1 (psd)

FCC 25.209 (gain), 25.222 (psd)

Availability is not assured

Secondary Allocation

Regulatory
skew angle
Optimum situation

small azimuth beamwidth across GSO

Troublesome situation

wide elevation beamwidth across GSO

Roll angle

Tropic latitudes

Skew Angle
other issues and concerns
Bird strike

Environmental Qualification

Aircraft blockages

Beam steering

Other Issues and Concerns
summary
Summary
  • ARINC 791 will lead to common provisions and interchangeable components
    • Viable technology
  • Ku band forward channel capacity is unmatched
  • Ku band return channel data rate is competitive with any other radio system
  • Coverage is subject to market demand