Accession Number:

ADA050050

Title:

Proposed Methods and Criteria for ATCRBS PRF Assignment.

Descriptive Note:

Final rept. 1974-1975,

Corporate Author:

IIT RESEARCH INST ANNAPOLIS MD

Personal Author(s):

Report Date:

1976-08-01

Pagination or Media Count:

45.0

Abstract:

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 PRFs, staggered and jittered PRFs, 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.

Subject Categories:

  • Air Navigation and Guidance
  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE