Accession Number : ADA291528

Title :   GPS-Squitter Channel Access Analysis,

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Orlando, Vincent A.

PDF Url : ADA291528

Report Date : 14 FEB 1995

Pagination or Media Count : 27

Abstract : GPS-Squitter is a system concept that merges the capabilities of Automatic Dependent Surveillance (ADS) and the Mode S beacon radar. The result is an integrated concept for seamless surveillance and data link that permits equipped aircraft to participate in ADS and/or beacon ground environments, offering many possibilities for transition from a beacon to an ADS-based environment. A number of choices exist in the selection of the squitter channel access protocol, including the access technique (i.e., random or organized), as well as such issues as the rate of squitter transmissions and whether they are fixed or variable. This report provides an analysis of the performance of the channel access protocol selected for GPS-Squitter compared with other alternative approaches. The results of this analysis indicate that the performance of the selected protocol is superior to the defined alternatives.

Descriptors :   *GLOBAL POSITIONING SYSTEM, *RADAR BEACONS, INTEGRATED SYSTEMS, ACCESS, DATA LINKS, SURVEILLANCE, AUTOMATIC, CHANNELS, OMNIDIRECTIONAL.

Subject Categories : Navigation and Guidance
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE