Accession Number : ADD017428

Title :   Reply-Frequency Interference/Jamming Detector.

Descriptive Note : Patent, Filed 26 Sep 75, Patented 3 Jan 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bishop, Walton B

Report Date : 03 Jan 1995

Pagination or Media Count : 6

Abstract : Received IFF reply-frequency signals are examined to determine whether they are being interfered with by enemy sources and indication of the extent of detected interference is provided. The number of correct replies received from selected range bins surrounding and including the center one in which a target leading edge is first declared is counted and compared with the count of the number of friend-accept decisions made based on replies from the selected range bins. The level of interference is then indicated by the ratio between the two counts. (MM)

Descriptors :   *RADAR COUNTERMEASURES, *RADAR JAMMING, *PATENTS, SIGNAL PROCESSING, TARGETS, BEAM SPLITTING, IDENTIFICATION, INTERFERENCE, ANTIJAMMING, COUNTER COUNTERMEASURES

Subject Categories : Radar Countermeasures

Distribution Statement : APPROVED FOR PUBLIC RELEASE