Method and system for increased update rate in acoustic positioning
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United States of America Patent
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Feb 26, 2008
Grant Date -
Oct 20, 2005
app pub date -
Jan 28, 2005
filing date -
Jan 30, 2004
priority date (Note) -
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Abstract
A method for obtaining an increased update rate in an indoor acoustic positioning system for determining the position of one or more identification tags, comprising transmitting from an identification tag an acoustic spread spectrum sequence that is unique to the identification tag, receiving the spread spectrum sequence in a detector unit and recording the arrival time of the spectrum sequence, and comparing the spectrum sequence with stored values of the spectrum sequences used by all the identification tags in the positioning system.
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