Methods and system for reduced attenuation in tracking objects using RF technology
First Claim
1. A system for RF-based tracking and locating objects, comprising:
- a Master Unit having an RF transceiver and adapted to interface to a Tag to measure distance to the Tag; and
the Tag having an RF transceiver and adapted to interface to the Master Unit,wherein the RF transceiver of the Master Unit and the RF transceiver of the Tag are configured to transmit and receive a narrow bandwidth ranging signal in no higher than a VHF band,wherein the narrow bandwidth ranging signal includes multiple pulses at different frequencies, andwherein the narrow bandwidth ranging signal is used for measuring the distance between the Master Unit and the Tag.
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Accused Products
Abstract
A method and system for a Radio Frequency (RF)-based identification, tracking and locating of objects. The method and system use a narrow bandwidth signal in VHF of lower frequency range, which minimizes propagation loss and loss of accuracy of the RF locating signals. The signal is sent from a Master Unit(s) to a Tag. The signal traveling time is recorded and the distance between the Master(s) and the Tag is calculated. The method and system allow achieving a longer distance of the RF signal penetration and an increased accuracy by using VHF bands. The techniques of Digital Signal Processing and Software-Defined Radio are used. The actual waveforms transmitted and received by the radios are defined by the software. The roles of the Master Unit(s) and the Tag can be reversed.
101 Citations
19 Claims
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1. A system for RF-based tracking and locating objects, comprising:
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a Master Unit having an RF transceiver and adapted to interface to a Tag to measure distance to the Tag; and the Tag having an RF transceiver and adapted to interface to the Master Unit, wherein the RF transceiver of the Master Unit and the RF transceiver of the Tag are configured to transmit and receive a narrow bandwidth ranging signal in no higher than a VHF band, wherein the narrow bandwidth ranging signal includes multiple pulses at different frequencies, and wherein the narrow bandwidth ranging signal is used for measuring the distance between the Master Unit and the Tag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for RF-based tracking and locating objects, comprising:
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a plurality of Master Units each having an RF transceiver and each adapted to interface to a Tag to measure distances to the Tag from each Master Unit of the plurality of the Master Units; and the Tag having an RF transceiver and adopted to interface to the plurality of the Master Units, wherein the RF transceivers of the Master Units and the RF transceiver of the Tag are configured to transmit and receive a narrow bandwidth ranging signal in no higher than a VHF band, wherein the narrow bandwidth ranging signal includes multiple pulses at different frequencies, and wherein the narrow bandwidth ranging signal is used for measuring the distance between the Master Units and the Tag. - View Dependent Claims (11, 12, 13, 14, 15, 16, 18, 19)
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17. A method for RF-based tracking and locating objects, comprising:
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transmitting, by a Master Unit, and receiving, by a Tag, a narrow bandwidth signal; the Master Unit having an RF transceiver adapted to interface to the Tag and the Tag having an RF transceiver adopted to interface to the Master Unit; and wherein the RF transceiver of the Master Unit and the RF transceiver of the Tag are transmitting and receiving the narrow bandwidth ranging signal in no higher that a VHF bands to measure a distance between the Master Unit and the Tag, and wherein the narrow bandwidth ranging signal includes multiple pulses at different frequencies.
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Specification