Determining the position of a mobile device using the characteristics of received signals and a reference database
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United States of America Patent
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Nov 20, 2012
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N/A
app pub date -
Aug 6, 2010
filing date -
Mar 31, 2008
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Abstract
Some embodiments use scanning devices to characterize radio signals received at a number of locations within a geographical area of interest. The signal characteristics along with the location information associated with the characteristics are stored in a centralized reference database. A mobile device characterizes signals it receives at a certain location and compares the characteristics with the signal characteristics stored in the reference database to obtain accurate location information of the certain location.
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