Method and system for determining position of a wireless electronic device within a volume
First Claim
1. A method for determining a position of a wireless electronic device within a volume, comprising:
- detecting a signal transmitted by the wireless electronic device for two-way communication at a first known position within the volume;
detecting the signal at at least three additional known positions within the volume, the at least three additional known positions being spatially independent of each other and of the first known position;
determining a phase difference at each of a plurality of frequencies between the signal detected at the first position and the signal detected at each of the at least three additional positions, the phase difference determined without use of a time reference;
determining the position of the wireless electronic device using a determined relationship of the phase differences with respect to frequency; and
at least one of storing and displaying the position of the wireless electronic device.
1 Assignment
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Accused Products
Abstract
A method for determining a position of a wireless electronic device within a volume includes detecting a signal transmitted by the wireless device during two-way communication to and from a first known position within the volume. The method further includes detecting the signal from at least three additional known positions within the volume, where the at least three additional known positions are spatially independent of each other. The method further includes determining a phase difference between the signal detected at the first position and the signal detected at each of the at least three additional positions, determining the position of the wireless electronic device using the phase differences, and at least one of displaying and storing the position of the wireless electronic device.
48 Citations
10 Claims
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1. A method for determining a position of a wireless electronic device within a volume, comprising:
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detecting a signal transmitted by the wireless electronic device for two-way communication at a first known position within the volume; detecting the signal at at least three additional known positions within the volume, the at least three additional known positions being spatially independent of each other and of the first known position; determining a phase difference at each of a plurality of frequencies between the signal detected at the first position and the signal detected at each of the at least three additional positions, the phase difference determined without use of a time reference; determining the position of the wireless electronic device using a determined relationship of the phase differences with respect to frequency; and at least one of storing and displaying the position of the wireless electronic device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for determining a position of a wireless electronic device within a volume, comprising:
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a reference receiver configured to detect a two-way communication signal transmitted by the wireless electronic device and used as a corresponding reference signal; at least three additional receivers which are spatially independent of each other, said additional receivers being coupled to the reference receiver to receive the reference signal and being configured to detect the signal transmitted by the wireless electronic device; and a processor configured to compute the position of the wireless electronic device based on a determined relationship of a phase difference with respect to frequency at a plurality of frequencies between the signal detected by the reference receiver and the signals detected at each of the additional receivers, the processor configured to determine phase differences without a time reference. - View Dependent Claims (8, 9, 10)
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Specification