Method and apparatus for location estimation using region of confidence filtering
First Claim
1. A method for location estimation in a wireless communication environment, comprising:
- receiving RF signals from at least two transmitters in the wireless communication environment;
calculating a number of location estimate candidates by a location estimation algorithm; and
forming a region of confidence (RoC) for the location estimate candidates.
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Abstract
A method for location estimation employs filtering in both the radio signal domain and the space domain separately. The method filters raw values of the run-time radio signal measurements to reject distorted inputs. A region of confidence (RoC) is formed according to certain algorithms. Only location estimates falling within the RoC are considered for further processing. The location estimate candidates filtered by the RoC are put in a number of time-indexed bins. Each of the bins contains location estimate candidates obtained at similar times. A shortest route connecting a candidate from each bin is calculated to further improve the accuracy of the location estimation.
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Citations
41 Claims
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1. A method for location estimation in a wireless communication environment, comprising:
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receiving RF signals from at least two transmitters in the wireless communication environment;
calculating a number of location estimate candidates by a location estimation algorithm; and
forming a region of confidence (RoC) for the location estimate candidates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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24. In a wireless network, a location estimation apparatus comprising:
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a RF signal receiver, receiving RF signals from transmitters in the wireless network;
a candidate processor, calculating a number of location estimate candidates by a location estimation algorithm; and
a region of confidence (RoC) formation module, forming a RoC for the location estimate candidates. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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Specification