Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Patent
1999-11-19
2000-09-19
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
342463, 342465, 375200, G01S 302
Patent
active
061219266
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.
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Belcher Donald K.
Boyd Robert W.
Wohl Michael A.
Hellner Mark
Wherenet
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