Abstract: A computer-implemented method for determining position of a mobile device using magnetic beacons including detecting, by a sensor in the mobile device, a magnetic signal having a unique signature associated with a given magnetic beacon; storing location and an associated signature for each of a plurality of magnetic beacons in a data store of the mobile device, where each of the magnetic beacons is assigned a different signature; extracting the unique signature from the magnetic signal; comparing the extracted signature to each of the signatures stored in the data store; identifying a given magnetic beacon from the plurality of magnetic beacons, where signature for the given beacon matches the extracted signature; and retrieving the location for the given magnetic beacon for the data store and correlating location of the mobile device with the location of the given magnetic beacon.

Abstract: Apparatus for determining a location of a target, the apparatus comprising: first and second magnetic dipole beacons positioned at substantially a same spatial location having respectively first and second time dependent magnetic moments oriented in different directions that generate first and second magnetic fields having different time dependencies; at least one magnetic field sensor coil located at the location of the target that generates signals responsive to the first and second magnetic fields; and circuitry that receives the signals generated by the at least one sensor coil and processes the signals responsive to the different time dependencies of the magnetic fields to determine a location of the at least one sensor coil and thereby the target.

Abstract: A computer-implemented method for determining position of a mobile device using magnetic beacons including detecting, by a sensor in the mobile device, a magnetic signal having a unique signature associated with a given magnetic beacon; storing location and an associated signature for each of a plurality of magnetic beacons in a data store of the mobile device, where each of the magnetic beacons is assigned a different signature; extracting the unique signature from the magnetic signal; comparing the extracted signature to each of the signatures stored in the data store; identifying a given magnetic beacon from the plurality of magnetic beacons, where signature for the given beacon matches the extracted signature; and retrieving the location for the given magnetic beacon for the data store and correlating location of the mobile device with the location of the given magnetic beacon.

Abstract: Apparatus for determining a location of a target, the apparatus comprising: first and second magnetic dipole beacons positioned at substantially a same spatial location having respectively first and second time dependent magnetic moments oriented in different directions that generate first and second magnetic fields having different time dependencies; at least one magnetic field sensor coil located at the location of the target that generates signals responsive to the first and second magnetic fields; and circuitry that receives the signals generated by the at least one sensor coil and processes the signals responsive to the different time dependencies of the magnetic fields to determine a location of the at least one sensor coil and thereby the target.