Location-determination method and apparatus
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United States of America Patent
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Feb 25, 2003
Grant Date -
Oct 10, 2002
app pub date -
Feb 12, 2001
filing date -
Feb 12, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
Some embodiments of the invention provide a location-determination system that includes a number of transmitters and at least one receiver. Based on a reference signal received by the receiver, this location-determination system identifies an estimated location of the receiver within a region. In some embodiments, the system selects one or more locations within the region. For each particular selected location, the system calculates a metric value that quantifies the similarity between the received signal and the signal that the receiver could expect to receive at the particular location, in the absence or presence of interference. Based on the calculated metric value or values, the system identifies the estimated location of the receiver.
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