PROPOSED METHODS AND CRITERIA FOR ATCRBS PRF ASSIGNMENT

A model designed to aid in selecting a pulse repetition frequency (PRF) for the Air Traffic Control Radar Beacon System (ATCRBS) has been developed. The model enables the analyst to select the best PRF from among those available for a particular site. This report centers on a discussion of the mechanisms of near-synchronous interference and the various remedies available. Both false-target-inducing near-synchronous replies and transponder lockout are considered. Among the considerations for reducing near-synchronous interference are pulse-repetition-period separations, distance separations between sites with like PRF's, staggered and jittered PRF's, target-detection parameter adjustments, e.g., leading- and trailing-edge thresholds, range-correlation algorithms, and receiver sidelobe suppression. Although all of the methods considered would be helpful in discriminating against near-synchronous interference, the greatest benefits are derived from maintaining at least 35 microseconds separation between pulse repetition periods for interrogator sites with overlapping service volumes.

• Corporate Authors:

  IIT Research Institute

  10 West 35th Street
  Chicago, IL  United States  60616
• Authors:
  • Crawford, C R
• Publication Date: 1976-8

Media Info

• Pagination: 45 p.

Subject/Index Terms

• TRT Terms: Air traffic control radar beacon system; Analog to digital converters; Electromagnetic compatibility; Electromagnetic interference; Electronics; Frequency modulation; Heart rate; Radar targets; Security; Synchronous control; Transponders
• Uncontrolled Terms: Criteria; Selection
• Old TRIS Terms: An/fyq-49; Digitizers; False targets; Locking electronics; Problem areas; Pulse rate; Synchronization electronics
• Subject Areas: Security and Emergencies;

Filing Info

• Accession Number: 00175250
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: ECAC-PR-76-030, FAA-RD-77-649E
• Contract Numbers: F19628-78-C-0006,, DOT-FA70WAI-175
• Files: NTIS
• Created Date: Apr 26 2003 12:00AM