Friend or foe detection

摘要

An identification friend or foe (IFF) system and method can covertly identify an object as friend or foe (FoF). An encoded illumination signal can be calculated using a detected ambient signal and an identification (ID) signal and emitted. The encoded illumination signal can be detected by analyzing a detected ambient signal and decoded using a specified key.

主权项

1. A covert identification system comprising:
an ambient detector configured to detect a first ambient light signal from a first location on an outer surface of an object; an emitter configured to emit a second ambient light signal from a second location on the outer surface of the object; and a first processor coupled to the ambient detector and the emitter, the first processor configured to:
(1) receive the first ambient light signal from the ambient detector;(2) calculate an encoded illumination signal using the received first ambient light signal and an identification (ID) signal; and(3) output the encoded illumination signal to the emitter for emitting the second ambient light signal using the encoded illumination signal; wherein the ID signal in the second ambient light signal output by the emitter is undetectable in the absence of a specified key.