Radio location system for precisely tracking objects by RF trans

Details Radio location system for precisely tracking objects by RF trans Radio location system for precisely tracking objects by RF trans

1997-01-21

1999-07-06

Hellner, Mark

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

Directive

Position indicating

342463, 342465, 375200, G01S 302

Patent

active

059202874

ABSTRACT:
An asset management radio location system uses time-of-arrival differentiation for random and repetitive spread spectrum, short duration pulse `blinks` from object-attached tags, to provide a practical, continuous identification of the location of each and every object within an environment of interest, irrespective whether the object is stationary or moving. Correlation-based RF processors determine which signals received by tag transmission readers are first-to-arrive signals as transmitted from any blinking tag, and an object location processor carries out time-of-arrival differentiation of these first-to-arrive transmissions from any blinking tag to determine where the respective object is located within the environment. A low power interrogation wand may be employed to refine the location of an object by a user programmed transmission-response exchange between the wand and the tag associated with the object of interest.

REFERENCES:
patent: 5119104 (1992-06-01), Heller
patent: 5742635 (1998-04-01), Sanderford, Jr.

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