Radio frequency navigation using frequency response matching
First Claim
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1. A method for radio navigation, comprising:
- predicting a frequency response for each of a multiplicity of possible device locations, wherein predicting the frequency response comprises;
determining a location of any objects proximate to the device;
determining physical dimensions of any objects proximate to the device; and
determining electromagnetic properties of any objects proximate to the device;
measuring a frequency response at an actual device location; and
matching the measured frequency response to one of the predicted frequency responses to determine an estimated device location, wherein the estimated device location corresponds to the possible device location associated with the one predicted frequency response that most closely matches the measured frequency response, wherein each predicted frequency response for each of the multiplicity of possible device locations and the measured frequency response at the actual device location are representable by a plot of received power over a selected range of frequencies to match the measured frequency response to one of the predicted frequency responses.
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Abstract
A method for radio navigation may include predicting a frequency response for each of a multiplicity of possible device locations. The method may also include measuring a frequency response at an actual device location. The method may further include matching the measured frequency response to one of the predicted frequency responses to determine an estimated device location, wherein the estimated device location corresponds to the possible device location associated with the one predicted frequency response that most closely matches the measured frequency response.
15 Citations
33 Claims
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1. A method for radio navigation, comprising:
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predicting a frequency response for each of a multiplicity of possible device locations, wherein predicting the frequency response comprises; determining a location of any objects proximate to the device; determining physical dimensions of any objects proximate to the device; and determining electromagnetic properties of any objects proximate to the device; measuring a frequency response at an actual device location; and matching the measured frequency response to one of the predicted frequency responses to determine an estimated device location, wherein the estimated device location corresponds to the possible device location associated with the one predicted frequency response that most closely matches the measured frequency response, wherein each predicted frequency response for each of the multiplicity of possible device locations and the measured frequency response at the actual device location are representable by a plot of received power over a selected range of frequencies to match the measured frequency response to one of the predicted frequency responses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for radio navigation, comprising:
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predicting a frequency response for each of a multiplicity of possible device locations, wherein predicting the frequency response comprises; determining a location of any objects proximate to the device; determining physical dimensions of any objects proximate to the device; and determining electromagnetic properties of any objects proximate to the device; measuring a frequency response at an actual device location; comparing the measured frequency response to each of the predicted frequency responses respectively associated with each of the multiplicity of possible device locations; and selecting an estimated device location from the multiplicity of possible device locations based on a best fit between the measured frequency response and one of the predicted frequency responses, wherein each predicted frequency response for each of the multiplicity of possible device locations and the measured frequency response at the actual device location are each representable by a plot of received power over a selected range of frequencies to determine the best fit between the measured frequency response and one of the predicted frequency responses. - View Dependent Claims (13, 14, 15, 16)
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17. A device for radio navigation, comprising:
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a frequency response prediction subsystem to predict a frequency response for each of a multiplicity of possible device locations; a frequency response measurement subsystem to measure a frequency response at an actual device location; a location estimation subsystem to compare the measured frequency response to each of the predicted frequency responses respectively associated with each of the multiplicity of possible device locations, and to select an estimated device location from the multiplicity of possible device locations based on a best fit between the measured frequency response and one of the predicted frequency responses, wherein each predicted frequency response for each of the multiplicity of possible device locations and the measured frequency response at the actual device location are each representable by a plot of received power over a selected range of frequencies to determine the best fit between the measured frequency response and one of the predicted frequency responses; and a geographic and materials database to store locations, physical dimensions and electromagnetic properties of any objects proximate to the device; and an apparatus to sense or locate any objects proximate to the device. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A device for radio navigation, comprising:
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means for predicting a frequency response for each of a multiplicity of possible device locations, wherein the means for predicting a frequency response comprises; means for determining a location of any objects proximate to the device; means for determining physical dimensions of any objects proximate to the device; and means for determining electromagnetic properties of any objects proximate to the device; means for measuring a frequency response at an actual device location; and means for matching the measured frequency response to one of the predicted frequency responses to determine an estimated device location, wherein the estimated device location corresponds to the possible device location associated with the one predicted frequency response that most closely matches the measured frequency response, wherein each predicted frequency response for each of the multiplicity of possible device locations and the measured frequency response at the actual device location are representable by a plot of received power over a selected range of frequencies to match the measured frequency response to one of the predicted frequency responses. - View Dependent Claims (24, 25, 26)
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27. A computer program product for radio navigation, the computer program product comprising:
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a computer usable storage medium having computer usable program code embodied therein, the computer usable storage medium comprising; computer usable program code configured to predict a frequency response for each of a multiplicity of possible device locations, wherein the computer usable program code to predict the frequency response comprises; computer usable program code configured to determine a location of any objects proximate to the device; computer usable program code configured to determine physical dimensions of any objects proximate to the device; and computer usable program code configured to determine electromagnetic properties of any objects proximate to the device; computer usable program code configured to compare a measured frequency response to each of the multiplicity of predicted frequency responses respectively associated with each of a multiplicity of possible device locations; and computer usable program code configured to select an estimated device location from the multiplicity of possible device locations based on a best fit between the measured frequency response and one of the predicted frequency responses, wherein each predicted frequency response for each of the multiplicity of possible device locations and the measured frequency response at the actual device location are each representable by a plot of received power over a selected range of frequencies to determine the best fit between the measured frequency response and one of the predicted frequency responses. - View Dependent Claims (28, 29, 30)
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31. A vehicle, comprising:
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a device for radio navigation, wherein the device for radio navigation includes; means for predicting a frequency response for each of a multiplicity of possible vehicle locations, wherein the means for predicting a frequency response comprises; means for determining a location of any objects proximate to the device; means for determining physical dimensions of any objects proximate to the and means for determining electromagnetic properties of any objects proximate to the device; means for measuring a frequency response at an actual vehicle location; and means for matching the measured frequency response to one of the predicted frequency responses to determine an estimated vehicle location, wherein the estimated vehicle location corresponds to the possible vehicle location associated with the one predicted frequency response that most closely matches the measured frequency response, wherein each predicted frequency response for each of the multiplicity of possible device locations and the measured frequency response at the actual device location are representable by a plot of received power over a selected range of frequencies to match the measured frequency response to one of the predicted frequency responses. - View Dependent Claims (32, 33)
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Specification