RF Fingerprinting for Location Estimation
First Claim
1. A method of estimation of a location of a terminal within an area of coverage of a wireless network comprising at least one fixed node, the method comprising:
- measuring a complex frequency response of a radio channel between the terminal and one of said fixed nodes; and
estimating the location of the terminal on the basis of at least a comparison between data representing a first metric of the measured complex frequency response and data representing a plurality of stored metrics,each of said plurality of stored metrics being related to one of a plurality of different locations within the network and each stored metric being of a complex frequency response measured between the said one of said fixed nodes and the location within the network to which the metric relates.
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Accused Products
Abstract
The location of a terminal is estimated within an area of coverage of a wireless network comprising at least one fixed node by measuring a complex frequency response of a radio channel between the terminal and one of said fixed nodes and estimating the location of the terminal on the basis of at least a comparison between data representing a first metric of the measured complex frequency response and data representing a plurality of stored metrics, each of said plurality of stored metrics being related to one of a plurality of different locations within the network and each stored metric being of a complex frequency response measured between the said one of said fixed nodes and the location within the network to which the metric relates.
51 Citations
21 Claims
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1. A method of estimation of a location of a terminal within an area of coverage of a wireless network comprising at least one fixed node, the method comprising:
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measuring a complex frequency response of a radio channel between the terminal and one of said fixed nodes; and estimating the location of the terminal on the basis of at least a comparison between data representing a first metric of the measured complex frequency response and data representing a plurality of stored metrics, each of said plurality of stored metrics being related to one of a plurality of different locations within the network and each stored metric being of a complex frequency response measured between the said one of said fixed nodes and the location within the network to which the metric relates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of compiling survey data for use in the estimation of a location of a terminal within an area of coverage of a wireless network comprising at least one fixed node, the method comprising:
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measuring a complex frequency response of a radio channel between a measurement node and one of said fixed nodes at a plurality of different locations within the network; and deriving data representing a metric of each measured complex frequency associate with each of the plurality of different locations; storing the derived data for each of said plurality different locations together with an indication of the location within the network to which the metric relates. - View Dependent Claims (12, 13, 14, 15)
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16. A processor arranged to estimate a location of a terminal within an area of coverage of a wireless network comprising at least one fixed node,
wherein the processor is arranged to receive a measurement of a complex frequency response of a radio channel between the terminal and one of said fixed nodes, and the processor is arranged to estimate the location of the terminal on the basis of at least a comparison between data representing a first metric of the measured complex frequency response and data representing a plurality of stored metrics, each of said plurality of stored metrics being related to one of a plurality of different locations within the network and each stored metric being of a complex frequency response measured between the said one of said fixed nodes and the location within the network to which the metric relates.
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21. A computer readable medium encoded with computer executable instructions for causing a processor to estimate a location of a terminal within an area of coverage of a wireless network comprising at least one fixed node by
receiving a measurement of a complex frequency response of a radio channel between the terminal and one of said fixed nodes, and estimating the location of the terminal on the basis of at least a comparison between data representing a first metric of the measured complex frequency response and data representing a plurality of stored metrics, each of said plurality of stored metrics being related to one of a plurality of different locations within the network and each stored metric being of a complex frequency response measured between the said one of said fixed nodes and the location within the network to which the metric relates.
Specification