System and method of locating a radio frequency (RF) tracking device using a calibration routine
First Claim
1. A position tracking system for tracking a physical location of a radio frequency (RF) transmitter, the position tracking system comprising:
- an RF transmitter transmitting an RF signal from each of a plurality of known locations where the RF transmitter is placed in turn;
at least four RF receiver antennae disposed at undetermined locations within range of the RF transmitter to receive the RF signals transmitted from the plurality of known locations; and
a receiver station in communication with the at least four RF receiver antennae, the receiver station initially calibrating a relative position of each RF receiver antenna with respect to the other RF receiver antennae based on the plurality of known locations and on information acquired in response to the RF signals received at the at least four RF receiver antennae, the receiver station being configured to compute dynamically a position of an RF-transmitting device based on the calibrated relative positions of the RF receiver antennae after initial calibration.
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Accused Products
Abstract
Position tracking systems and methods for tracking a physical location of a radio frequency (RF) transmitter include an RF transmitter transmitting an RF signal from a plurality of known locations. At least four RF receiver antennae are disposed at unknown locations within range of the RF transmitter to receive the RF signals transmitted from the plurality of known locations. A receiver station in communication with the at least four RF receiver antennae initially calibrates a relative position of each RF receiver antenna with respect to the other RF receiver antennae based on the plurality of known locations and on information acquired in response to the RF signals received at the at least four RF receiver antennae.
101 Citations
17 Claims
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1. A position tracking system for tracking a physical location of a radio frequency (RF) transmitter, the position tracking system comprising:
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an RF transmitter transmitting an RF signal from each of a plurality of known locations where the RF transmitter is placed in turn; at least four RF receiver antennae disposed at undetermined locations within range of the RF transmitter to receive the RF signals transmitted from the plurality of known locations; and a receiver station in communication with the at least four RF receiver antennae, the receiver station initially calibrating a relative position of each RF receiver antenna with respect to the other RF receiver antennae based on the plurality of known locations and on information acquired in response to the RF signals received at the at least four RF receiver antennae, the receiver station being configured to compute dynamically a position of an RF-transmitting device based on the calibrated relative positions of the RF receiver antennae after initial calibration. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for tracking a physical location of a radio frequency (RF) transmitting device, the method comprising:
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receiving, by at least four RF receiver antennae disposed at undetermined locations, an RF signal transmitted in turn from each of a plurality of known locations by an RF transmitter; and calibrating a relative position of each RF receiver antenna with respect to the other RF receiver antennae based on the plurality of known locations and information acquired in response to the RF signals received at the at least four RF receiver antennae and dynamically computing the physical location of the RF-transmitting device based on the relative positions of the at least four RF receiver antennae after the calibrating of the relative position of each RF receiver antenna with respect to the other RF receiver antennae. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A radio frequency (RF) receiver station for tracking a physical location of an RF-transmitting, tracked device, the receiver station comprising:
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a controller unit in communication with at least four RF receiver antennae disposed at undetermined locations, the controller unit computing a set of time difference of arrival measurements for each of at least four different transmissions of RF signals from the tracked device and received at each of the at least four RF receiver antennae; and a computing system in communication with the controller unit to receive therefrom the sets of time difference of arrival measurements, the computing system including memory that stores a position location for each of a plurality of known locations and associates each set of time difference of arrival measurements with one of the known locations, the computer system further comprising a processor configured to compute a relative position of each RF receiver antenna with respect to the other RF receiver antennae based on the plurality of known locations and the sets of time difference of arrival measurements, the computing system being further configured to compute dynamically the physical location of the RF-transmitting tracked device based on the computed relative ions of the at least four RF receiver antennae after initial calibration. - View Dependent Claims (16, 17)
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Specification