Radio geo-location system with advanced first received wavefront

Details Radio geo-location system with advanced first received wavefront Radio geo-location system with advanced first received wavefront

1999-01-28

1999-11-30

Hellner, Mark

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

Directive

Position indicating

342463, 342465, 375200, G01S 302

Patent

active

059950463

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 spatially diverse antennas coupled to tag transmission readers are first-to-arrive signals as transmitted from any blinking tag. An object location processor carries out time-of-arrival differentiation of first-to-arrive transmissions from any blinking tag to determine where the respective object is located within the environment.

REFERENCES:
patent: 5119104 (1992-06-01), Heller
patent: 5420883 (1995-05-01), Swensen et al.
patent: 5742035 (1998-04-01), Sanderford, Jr.
patent: 5920287 (1999-07-01), Belcher et al.

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