Status Report : Assessment of Compatibility of Planned LightSquared Ancillary Terrestrial Component Transmissions in the 1526-1536 MHZ Band with Certified Aviation GPS Receivers

Details

• Alternative Title:
  National Telecommunications and Information Administration (NTIA) letter enclosure 4 - 2012 January 25 - status report assessment of planned LightSquared (LSQ) ancillary terrestrial components (ATC) transmissions in 1526 to 1536 MHz
• Creators:
  Huerta, Michael P.
• Corporate Creators:
  United States. Department of Transportation. Federal Aviation Administration
• Subject/TRT Terms:
  • Global Positioning System
  • Geographic information systems
  • Communication systems
  • Mobile communication systems
  • Satellite communication
  • Wireless communication systems
  • Broadband
  • Global Positioning System
  • Geographic information systems
  • Communication systems
  More +
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  John A. Volpe National Transportation Systems Center (U.S.)
• Abstract:
  The Federal Aviation Administration (FAA) has worked with LightSquared since August ; 2011 to evaluate the compatibility of certified aviation receivers with the planned ; LightSquared ancillary terrestrial component (ATCt) network using a signal broadcast in ; the 1526-1536 MHz band. ; The assessment in this report is based on FAA performance standards. Unlike most other ; GPS devices, certified aviation GPS receivers have interference rejection requirements ; specified by the FAA and harmonized internationally. Aircraft antenna characteristics ; are also specified. The use of these specifications precludes the need to individually test ; every aviation device, and allows the assessment to be accomplished through analysis ; which estimates the LightSquared interference present at the aircraft GPS receiver, and ; then compares that level to the specified rejection limits. ; To predict the interference at the aircraft, the FAA has developed a set of propagation ; models that build upon testing conducted by the mobile satellite services and cellular ; communications industries for terrestrial applications. Unfortunately, aircraft operate at ; altitudes where no significant research on propagation has been conducted. Addressing ; this gap has been the primary focus of the FAA and LightSquared activities though ; several technical issues remain unresolved, which would require additional resources. ; While variations in the FAA and LightSquared models affect the scope of impact, they do ; not affect our fundamental conclusions.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/9561/dot_9561_DS1.pdf
• File Type:
  [PDF - 6.28 MB]
• Collection(s):
  Volpe Center
• Main Document Checksum:
  urn:sha256:360a7cdbe4fe0ff2f8e4712e223012f05cf4786d5b7acbbefe30292086c8fcac