Environmental location system
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United States of America Patent
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Jul 10, 2001
Grant Date -
N/A
app pub date -
Feb 10, 1999
filing date -
Feb 10, 1999
priority date (Note) -
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Abstract
A system and method for determining a location. The system employs encoded information devices dispersed through the environment, each having a non-unique code associated therewith. The codes from the encoded information devices are acquired as a reading device passes nearby, and stored. The codes from a proximate set of information devices are correlated with a map or mapping relation to determine one or more consistent positions within the environment. The information devices are preferably passive acoustic wave transponders, and the mapping relation may be a pseudorandom sequence or a defined map.
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