TRIS Online Record

Printable View

Title	PROPOSED METHODS AND CRITERIA FOR ATCRBS PRF ASSIGNMENT
Accession No	00175250
Authors	Crawford, C R
Corp. Authors / Publisher	IIT Research Institute
Publication Date	19760800
Description	45 p.
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 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.
TRT Terms	Air traffic control radar beacon system ; Analog to digital converters ; Electromagnetic compatibility ; Electromagnetic interference ; Electronics ; Heart rate ; Radar targets ; Security ; Synchronous control ; Transponders
Other Terms	An/fyq-49; Criteria; Digitizers; False targets; Locking electronics; Problem areas; Pulse frequency modulation; Pulse rate; Selection; Synchronization electronics
Contract Number	F19628-78-C-0006,; DOT-FA70WAI-175
Report Number	ECAC-PR-76-030; FAA-RD-77-649E
Availability	National Technical Information Service Order Number: AD-A050050/4ST
Document Source	National Technical Information Service
TRIS Files	NTIS
Database	TRIS Online

TRIS is a bibliographic database funded by sponsors of the Transportation Research Board (TRB), primarily the state departments of transportation and selected federal transportation agencies. TRIS Online is hosted by the National Transportation Library under a cooperative agreement between the Bureau of Transportation Statistics and TRB.