Location determination using RF fingerprinting
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United States of America Patent
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Nov 29, 2011
Grant Date -
Sep 9, 2010
app pub date -
May 18, 2010
filing date -
Sep 22, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A method for determining the location of a mobile unit (MU) in a wireless communication system and presenting it to a remote party. The location of a remote MU is determined by comparing a snapshot of a predefined portion of the radio-frequency (RF) spectrum taken by the MU to a reference database containing multiple snapshots taken at various locations. The result of the comparison is used to determine if the MU is at a specific location. The comparison may be made in the MU, or at some other location situated remotely from the MU. In the latter case, sufficient information regarding the captured fingerprint is transmitted from the MU to the remote location. The database may be pre-compiled or generated on-line.
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