PRECISION LOCATION METHOD AND SYSTEM
First Claim
1. A system for locating an object, comprising:
- a plurality of reference units for positioning about a region in which a mobile unit is located, each reference unit including a transceiver for transmitting and receiving a transaction-based location signal to and from the mobile unit; and
at least one processor configured for;
estimating time offsets between the mobile unit and the plurality of reference units;
aligning the transaction-based location signals by removing the time offsets; and
collectively processing data representative of the aligned location signals received from the plurality of reference units based on a plurality of potential locations to identify at least one of the potential locations as a likely mobile unit location.
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Abstract
Systems and methods for locating an object are disclosed herein. The locator system includes a plurality of reference units and a processor in communication with the reference units. The reference units are positioned about a region in which a mobile unit is located, and each reference unit includes a transceiver for transmitting and receiving a transaction-based location signal to and from the mobile unit. The processor is configured for estimating time offsets between the mobile unit and reference units and aligning the transaction-based location signals from the reference units by removing the time offsets. The processor is further configured for collectively processing data representative of the aligned location signals based on a plurality of potential locations to identify at least one of the potential locations as a likely mobile unit location.
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Citations
22 Claims
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1. A system for locating an object, comprising:
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a plurality of reference units for positioning about a region in which a mobile unit is located, each reference unit including a transceiver for transmitting and receiving a transaction-based location signal to and from the mobile unit; and at least one processor configured for; estimating time offsets between the mobile unit and the plurality of reference units; aligning the transaction-based location signals by removing the time offsets; and collectively processing data representative of the aligned location signals received from the plurality of reference units based on a plurality of potential locations to identify at least one of the potential locations as a likely mobile unit location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for locating an object comprising:
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a plurality of reference units for positioning about a region in which a mobile unit is located, each reference unit including a transceiver for transmitting and receiving unaligned transaction-based location signals to and from the mobile unit; and at least one processor for; estimating time offsets between the mobile unit and the plurality of reference units; aligning the transaction-based location signals by removing the time offsets; and collectively processing data representative of the unaligned location signals and the aligned location signals to identify at least one of the potential locations as a likely mobile unit location, wherein collectively processing data comprises; calculating a first metric at the plurality of potential locations based on the aligned signals; calculating a second metric at the plurality of positional locations based on unaligned signals; and calculating a posterior probability distribution at the plurality of potential locations based at least the first metric and the second metric.
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14. A method for locating an object, comprising:
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positioning a plurality of reference units about a region in which a mobile unit is located, each reference unit including a transceiver for transmitting and receiving a transaction-based location signal to and from the mobile unit; estimating time offsets between the mobile unit and the plurality of reference units; aligning the transaction-based location signals by removing the time offsets; and
collectively processing data representative of the aligned location signals received from the plurality of reference units based on a plurality of potential locations to identify at least one of the potential locations as a likely mobile unit location. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A method for locating an object, comprising:
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estimating time offsets between a mobile unit and a plurality of reference units; aligning transaction-based location signals by removing the time offsets; and collectively processing data representative of unaligned location signals and the aligned location signals to identify at least one of the potential locations as a likely mobile unit location, wherein collectively processing data comprises; calculating a first metric at the plurality of potential locations based on the aligned signals; calculating a second metric at the plurality of positional locations based on unaligned signals; and calculating a posterior probability distribution at the plurality of potential locations based at least the first metric and the second metric.
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Specification