Reply-frequency interference/jamming detector

Details Reply-frequency interference/jamming detector Reply-frequency interference/jamming detector

1975-09-26

1995-01-03

Buczinski, Stephen C.

Communications: directive radio wave systems and devices (e.g.,

Radar transponder system

Iff or sif

342 17, 342159, G01S 1378, G01S 136

Patent

active

053790430

ABSTRACT:
Received IFF reply-frequency signals are examined to determine whether they re 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.

REFERENCES:
patent: 3058104 (1962-10-01), Garfinkel et al.
patent: 3349402 (1967-10-01), Foster
patent: 3803604 (1974-04-01), Case

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