Location and tracking of people with combined use of RF...

Details Location and tracking of people with combined use of RF... Location and tracking of people with combined use of RF...

2006-04-17

2008-09-02

Issing, Gregory C (Department: 3662)

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

Directive

Position indicating

Reexamination Certificate

active

07420510

ABSTRACT:
A system for tracking persons and other assets in a structure, having a multi-function tracking tag and a network of fixed RF receivers forming a gateway array. The location of the person being tracked is calculated by a computer using an algorithm that weights each separate signal according to the probability of its accuracy, thus using data with the least error. A preferred algorithm is shown in FIG.2.

REFERENCES:
patent: 4494119 (1985-01-01), Wimbush
patent: 5977913 (1999-11-01), Christ
patent: 6567669 (2003-05-01), Groome
patent: 7236128 (2007-06-01), Sugar et al.
patent: 2002/0008625 (2002-01-01), Adams et al.
patent: 2002/0183979 (2002-12-01), Wildman
patent: 2003/0043073 (2003-03-01), Gray et al.
patent: 2005/0093745 (2005-05-01), Krumm et al.

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