| http://www.w3.org/ns/prov#value | - More than three receiving units may be employed to determine tag 2 location with a greater degree of certainty. [0021] The present invention provides location finding of tags 2 in the presence of a wireless network, such as a WLAN (e.g., IEEE 802.11) or WPAN network, by calculating the time-difference-of-arrival (TDOA) for signals received from tags 2.
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