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Demonstration of an Airborne Software Reprogrammable Payload

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SRPs may allow for Automatic Identification System (AIS) message collection from the sky ... with the Cessna 337 Super Skymaster at Indian Head Airport in Md. ... – PowerPoint PPT presentation

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Title: Demonstration of an Airborne Software Reprogrammable Payload


1
Demonstration of an Airborne Software
Reprogrammable Payload
  • Ryan Hauer, Naval Research Laboratory
  • Thomas Pickard, Naval Research Laboratory
  • Timothy Meehan, Vista Research, formerly Naval
    Research Laboratory
  • Christopher Huffine, Naval Research Laboratory

2
Outline
  • Introduction
  • Hardware
  • Software
  • Airborne Demonstration
  • Results

3
Introduction
  • An airborne Software Defined Radio (SDR) can be
    referred to as a Software Reprogrammable Payload
    (SRP)
  • SRPs can facilitate beyond line-of-sight (BLOS)
    communication
  • SRPs may allow for Automatic Identification
    System (AIS) message collection from the sky
  • Demonstrate SRP with multiple applications on an
    airborne platform using COTS components
  • Utilized GNU Radio, an SDR API
  • Leveraged Ettus Researchs Universal Software
    Radio Peripheral and applicable daughterboards

4
Hardware
5
Software Overview
  • Three major applications
  • Bent pipe relay with interference mitigation
  • AIS collection and downlink
  • IP Router
  • All software was written in Python and all
    applications which required interaction with the
    USRP utilized the GNU Radio API

6
Relay with Interference Mitigation
Signal without interference
Signal of Interest
Interference
7
Relay Application
8
AIS Application
9
AIS Application
10
IP Router
Transmitting at Frequency B
Radio 2 Receives Frequency B
Radio 3 Receives Frequency C
Radio 1 Sending to Radio 2 at Frequency A
Radio 4 Receives Frequency D
11
IP Router
12
Airborne Demonstration
The SRP hardware in a rack inside a Cessna 337
Super Skymaster.
Thomas Pickard, Ryan Hauer, and Gordon Seuell
pictured with the Cessna 337 Super Skymaster at
Indian Head Airport in Md.
13
Results
  • Relay worked well out to 10 miles
  • Interference was consistently mitigated
  • Limiting factors included geometry, antenna
    separation, full duplex
  • In the AIS application, 174 unique MMSI numbers
    were detected during one flight. Vessels could be
    observed in the Atlantic Ocean, on the Delaware
    River, in the Chesapeake Bay, and on the Potomac
    River
  • Routing successfully demonstrated through chat
    program, improved performance through chats
    acknowledgement scheme

14
Conclusion
  • The STAFE program demonstrated the utility of the
    SRP for military communications and signal
    collection
  • The program exercised a single payload built
    from commercial components with three diverse
    applications
  • In the future, robust coding techniques and
    alternative antenna designs and placement can be
    utilized to improve link performance

15
References
  • 1 J. Mitola, The Software Radio Architecture,
    IEEE Communications Magazine, vol. 33, no. 5, May
    1995.
  • 2 Automatic Identification System Overview
    USCG Navigation Center, United States Coast
    Guard. June 6, 2009 lthttp//www.navcen.uscg.gov/en
    av/AIS/default.htmgt
  • 3 GNU Radio. GNU Radio Website. June 10, 2009
    lthttp//GNU Radio.org/tracgt
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