Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Iff or sif
Patent
1987-12-11
1992-08-25
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Iff or sif
359154, H04B 900
Patent
active
051422883
ABSTRACT:
An electro-optical IFF system easily integrable into existing laser systems uses a laser to illuminate a potential target platform. The potential target, if friendly, has apparatus for returning to the illuminating platform a return beam which has the same signature but is delayed with respect to the illuminating beam by a predetermined time interval. If the illuminating platform sees a return beam with the same signature in the proper time frame, an indication is generated that the target is friendly. A friendly target platform contains apparatus for comparing the signature of the illuminating beam to a stored reference signature, and for providing a friendly-illumination indication and activating the return beam only if the signatures match.
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