Location determination using RF fingerprints
First Claim
1. A method comprising:
- receiving a first RF fingerprint for a first signal that traverses a first path between a mobile unit and a base station; and
estimating the location of said mobile unit based on said first RF fingerprint.
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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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Citations
14 Claims
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1. A method comprising:
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receiving a first RF fingerprint for a first signal that traverses a first path between a mobile unit and a base station; and
estimating the location of said mobile unit based on said first RF fingerprint. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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receiving (i) a first RF fingerprint for a first signal that traverses a first path between a mobile unit and base station and (ii) a first estimate of the location of said mobile unit based on the global positioning system; and
generating a second estimate of the location of said mobile unit based on (i) said first RF fingerprint and (ii) said first estimate of the location of said mobile unit. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification