Identification system for verifying an authorization to...

Details Identification system for verifying an authorization to... Identification system for verifying an authorization to...

2006-08-29

2006-08-29

Garber, Wendy R. (Department: 2612)

Communications: electrical

Selective

Intelligence comparison for controlling

C340S010400

Reexamination Certificate

active

07098769

ABSTRACT:
An identification system is disclosed in which an interrogation signal is emitted on the side of the object, the signal having a carrier frequency which is modified in sections. A mobile encoder (20) encodes the interrogation signal and produces a response signal which is sent back to the object (10). The response signal is mixed with the interrogation signal and decoded in an evaluation unit (14–16) on the side of the object. The distance (d) between the encoder (20) and the object (10) is then determined by means of Fourier transformation (16).

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