DABS (DISCRETE ADDRESS BEACON SYSTEM) DOWNLINK CODING

The report summarizes the encoding/decoding techniques incorporated into the DABS downlink design. It has been determined that the binary cyclic code used for the uplink is applicable to the downlink interference environment, thus rendering considerable hardware simplication in the transponder. The downlink environment leads to a characterization as a burst erasure channel, which allows the code to be used in a burst correction capacity. The report concentrates on the error correction techniques including specific implementations. Evaluation of the performance of the code by simulation and/or bench test is presently being carried out and will be reported in a future document.

• Corporate Authors:

  Lincoln Laboratory

  Massachusetts Institute of Technology
  Lexington, MA  United States  02173

  Federal Aviation Administration

  Systems R&D Service, 800 Independence Avenue, SW
  Washington, DC  United States 

  Department of the Air Force

  Pentagon
  Washington, DC  United States  20330
• Authors:
  • Barrows, J T
• Publication Date: 1975-9-12

Media Info

• Pagination: 38 p.

Subject/Index Terms

• TRT Terms: Air traffic control; Coding systems; Data communications; Errors
• Uncontrolled Terms: Correction (Mathematics); Data links
• Old TRIS Terms: Coding
• Subject Areas: Operations and Traffic Management;

Filing Info

• Accession Number: 00093328
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: ATC-48 Proj. Rpt., FAA-RD-75-61
• Contract Numbers: F19628-76-C-0002,, DOT-FA72WAI-261
• Files: NTIS, USDOT
• Created Date: Dec 16 1976 12:00AM