Patent ID: 6657586
Filing Date: 2003-12-02
Classification: G01S

Abstract:
A system for locating an object comprising:a plurality of tag signal readers for receiving wireless tag signals from a tag transmitter coupled with an object to be located, said tag signals having data indicating the identity of the object to which the tag transmitter is coupled, each tag signal reader further comprising a global positioning system receiver associated therewith for determining the location of a tag signal reader, and a wireless transmitter for transmitting a wireless data signal incorporating the wireless tag signal and location of the tag signal reader; and a location processor for receiving the wireless data signal from the tag signal readers for determining which tag signals are first-to-arrive signals and conducting differentiation of the first-to-arrive signals relative to the location of the tag signal readers as determined by the global positioning system receivers to locate a tag transmitter and object coupled therewith.