Sergey Laletin FGUP GosNIIAS Niclas Gustavson LFV

1
Sergey Laletin FGUP GosNIIASNiclas
Gustavson LFV

• Proposal for Appendix
• Digital communication systems
• to RTCA SC 206 / EUROCAE WG-44

2
Needs

• Show basic technical knowledges of communication
  systems and information theory
• Show list and technical details of ICAO adopted
  and other data links

3
Proposed structure

• Two parts
• Basics of digital communication systems
• Aviation data links

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Basics of digital communication systems

• Advantages of digital communication systems
• Information theory and Shennons theorem
• ISO/OSI reference model
• Communication and access types
• Digital signal processing

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Basics of digital communication systems

• Types of modulation
• Performance criteria
• Software role in communication systems
• Standardization

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Aviation data links and its applications

• Radio frequency spectrum allocation for aviation
  purposes
• Application types
• Data links technical details
• Standardization

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Radio frequency spectrum allocation for aviation
purposes
SSR Mode A/C interrogations, SSR Mode S
interrogations (1030 MHz)
VOR, ILS, VDB, VDL Mode 4 (108 117.975 MHz)
UAT (978 MHz)
SSR Mode A/C replies, SSR Mode S replies, ADS-B
Mode S ES transmissions (1090 MHz)
ACARS, VDL mode 2, VDL Mode 3, VDL Mode
4 (117.975 137 MHz)
DME (960 1215 MHz)
1 GHz
100 MHz
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Basics on aviation digital communication and
surveillance systems with emphasis to ADS-B
Channel Structure
Aircraft Sensor
Traffic Environment
Wideband Random Access
Mode S ES 1090 MHz (ICAO Annex 10)
ADS-B
Mode A/C SSR replies
1090
Mode A/C TCAS replies
Random
MHZ
Unslotted
Mode S SSR replies/DL
1090 Tx
Mode-S
Mode S TCAS replies/DL
Channel
IFF Replies
Narrowband Self Organizing Broadcast and
Point-to-point
Slotted
VDL Mode 4 25 kHz channels 117.975 137 MHz 108
117.975 MHz (ICAO Annex 10)
25
KHZ
ADS-B
Self Organized
Channel 1
Other Data Link Traffic
Tx/Rx 1
Slotted
25
KHZ
ADS-B
Self Organized
Channel 2
Tx/Rx 2



Other Data Link Traffic
Tx/Rx N

Slotted
25
KHZ
ADS-B
Self Organized
Channel N

Wideband Hybrid Access
UAT 978 MHz (ICAO ACP/WGC9-WP03)
Random
3
MHZ BW
Unslotted
Time
ADS-B
Segmented
UAT Tx/Rx
Uplink Broadcast Traffic
GND-Fixed Assigned Slotted
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Data Links
- Data links proposed for appendix
10

• Any other proposals are opened for describe other
  data links.

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Plan for describe data links technical details

• Technical characteristics
• Frequency,
• Modulation,
• Bit rate, (etc)
• Short description of data link applications

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List of reference

• ICAO Annex 10
• ICAO Doc. 9694
• ICAO Doc. 9816
• ICAO Doc. 9718
• ICAO ACP/WGC9-WP03 and WP04
• ETSI EN 301 842 (Part 1 4)
• ETSI EN 302 842 (Part 1 4)
• Eurocae ED-108A
• RTCA DO-242A
• RTCA DO-260A
• RTCA DO-282A
• Principles of Digital Communication Systems and
  Computer Networks by Dr. K.V. Prasad 
  ISBN1584503297 Charles River Media
• Digital and Analog Communication Systems by Leon
  W. Couch ISBN 0-13-599028-9 Prentice-Hall
  International
• European Data Link Roadmap, European Commission,
  March 2003

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• Thank you