Accession Number:

ADA024471

Title:

DABS Modulation and Coding Design - A Summary.

Descriptive Note:

Project rept.,

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

Report Date:

1976-03-12

Pagination or Media Count:

106.0

Abstract:

The Discrete Address Beacon System DABS has been designed as an evolutionary replacement for the Air Traffic Control Radar Beacon System ATCRBS. As with ATCRBS, DABS is a cooperative Air Traffic Surveillance System utilizing ground based sensors interrogators and airborne transponders. In addition to its surveillance function, DABS integrally accommodates ground-to-air and air-to-ground data link communication within the interrogations and replies. In DABS, each aircraft transponder may be individually interrogated, using its unique 24-bit address, giving the ground based interrogators freedom to schedule interrogations and replies to make efficient use of the channels essentially independent of the aircraft traffic distribution. The evolutionary constraint on DABS, requiring the capability for one-for-one replacement of ATCRBS ground sensors and transponders, dictated the need to maximize commonality between the two systems. This report presents the rationale for the selection of DABS signalling waveforms and error control techniques.

Subject Categories:

  • Cybernetics
  • Air Navigation and Guidance
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE