Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Iff or sif
Patent
1993-06-22
1995-10-17
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Iff or sif
342 6, 342 54, G01S 1379
Patent
active
054594707
ABSTRACT:
A system (10) for friend-or-foe identification (IFF) comprises an interrogator unit (18) carried on a first platform (T1) for generating and transmitting a laser beam. A control unit (22) selectively directs the transmitted laser beam toward a second platform (T2). A coding/decoding unit (28) encodes an IFF interrogator message with which a portion of the transmitted laser beam is modulated. A laser reflector (30) carried on the second platform receives the coded laser beam. The reflector is a normally passive reflector which is activated by receipt of the transmitted laser beam. The reflector responds to the IFF message contained in the received laser beam by modulating the unmodulated portion of the transmitted laser beam. This newly modulated portion of the laser beam is reflected back toward the first platform. The coding/encoding unit decodes on the first platform receives and the response, and determines if it corresponds to a predetermined response which identifies the second platform as a "friend".
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Holder David
Waldman Gary
Wootton John R.
Electronics & Space Corp.
Sotomayor John B.
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