ACCURATE GEOGRAPHIC TRACKING OF MOBILE DEVICES
First Claim
1. A system for tracking mobile devices in real time comprising:
- a multifrequency transmitter, said transmitter transmitting identification and position information of the transmitter, a mobile device comprising;
a user display that provides images to a user as viewed from a specified viewpoint,at least two mobile display antennae mounted on the display adapted to receive signals from the multifrequency transmitter;
a receiver circuit having a carrier recovery circuit that functions to synchronize the signals received by each wireless, compare their phases and determine phase differences; and
a processor running coupled to the receiver circuit, adapted to run executable code to;
receive the phase differences from the receiver circuit;
calculate the distance from a multifrequency transmitter to each antenna based on phase differences; and
calculate the position of each antenna based on the calculated distances, and causing the images provided to the user to have viewpoint based upon the calculated positions of each antenna.
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Accused Products
Abstract
A tracking system is described having at least two mobile transmitter/receivers (“transceivers”) which sense and respond to at least one tracking transceiver. The signals sent to and received from the mobile transceivers are analyzed to get a distance (range) that each is from the tracking transceiver. This can be converted into a position relative to the mobile transceivers. If there are enough transceivers, and at least one knows its absolute location, the absolute location of the mobile transceivers may be determined. Existing smartphones, cellphones, Wi-Fi routers, Bluetooth devices, and near-field devices that have on-board processors, can be modified to run executable code to implement the current invention. They may communicate using at least one of the modalities for tracking. These may be implemented in tracking the position and orientation of moving devices, such as a head-mounted display for virtual/Augmented Reality, automobiles, packages in a package delivery truck. The system may also be implemented to identify and keep track of the last known location of various objects.
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Citations
20 Claims
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1. A system for tracking mobile devices in real time comprising:
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a multifrequency transmitter, said transmitter transmitting identification and position information of the transmitter, a mobile device comprising; a user display that provides images to a user as viewed from a specified viewpoint, at least two mobile display antennae mounted on the display adapted to receive signals from the multifrequency transmitter; a receiver circuit having a carrier recovery circuit that functions to synchronize the signals received by each wireless, compare their phases and determine phase differences; and a processor running coupled to the receiver circuit, adapted to run executable code to; receive the phase differences from the receiver circuit; calculate the distance from a multifrequency transmitter to each antenna based on phase differences; and calculate the position of each antenna based on the calculated distances, and causing the images provided to the user to have viewpoint based upon the calculated positions of each antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 19, 20)
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9. A system for tracking the location of movable objects comprising:
a plurality of transceivers being one of the group consisting of;
Bluetooth, Wi-Fi, cellular and near field transceivers, each transceiver having;a transmitter capable of transmitting an RF signal; and a receiver capable of receiving an RF signal; a processor capable of running prestored executable code causing a requesting transceiver to; broadcast a signal requesting nearby transceivers to transmit a signal back which includes an identifier of the transceiver; determine a range from each corresponding transceiver; calculate, from the plurality of received signals, a location of the requesting transceiver. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of tracking a position of a movable objects comprising the steps of:
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providing at least two tracked transceiver at known locations relative to the tracked object; employing a least two node transceiver which will return a signal when requested and transmit their identity in the signal; transmitting from the node transceivers, and indication of their presence; requesting from the tracked transceivers, that the node transceivers send a reply; receiving at the tracked transceivers the signals from each of the node transceivers; determining a distance between the each node transceiver and tracked transceiver; using the known positional locations of the tracked transceivers to the movable object, and calculating the position of each tracked transceiver, and the movable object relative to the node transceivers.
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Specification