×

Methods and system for multi-path mitigation in tracking objects using reduced attenuation RF technology

  • US 7,872,583 B1
  • Filed: 07/14/2009
  • Issued: 01/18/2011
  • Est. Priority Date: 12/15/2005
  • Status: Active Grant
First Claim
Patent Images

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;

    the Master Unit having an RF transceiver and adapted to interface to one or more Masters to measure distance to between Masters; and

    the Tag having an RF transceiver and adapted to interface to the Master Unit; and

    the Master Unit having an RF transceiver and adapted to interface to one or more Master Units,wherein the RF transceiver of the Master Unit and the RF transceiver of the Tag are configured to transmit and receive a ranging signal;

    the RF transceiver of the Master Unit and the RF transceiver(s) of one or more Master Units are configured to transmit and receive a ranging signal,wherein the RF transceivers of all Master Units are configured to transmit a ranging signal,wherein the RF transceiver of the Tag is configured to receive a ranging signal;

    wherein the RF transceivers of all Master Units are configured to receive a ranging signalwherein the ranging signal includes multiple pulses at different frequencies,wherein the ranging signal is used for measuring the distance between the Master Unit and the Tag, and all Master Units; and

    wherein a high-resolution spectrum estimation analysis is used to reduce spatial ambiguity in the distance measurement, including estimating a model size for a number of (GB) frequency components, and calculating the distance based on a distribution of the frequency components.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×