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US 8,855,671 B1Granted
System and method for determining position
AssigneeGoogle Inc.
InventorRussell Mirov
Life of this patent
Estimating the term…
Abstract
Systems and methods for determining a position of a mobile device including a magnetic signal source deployed at a predetermined location. The magnetic signal source is adapted to transmit a low frequency modulated magnetic signal. The position and orientation of the mobile device relative to the predetermined location of the magnetic signal source is determined based on the signal bearing and the signal strength.
Claims12
A method for determining position, comprising:
- receiving, at a mobile device, a magnetic signal having a signal bearing and a signal strength, the signal being transmitted from a magnetic signal source having a predetermined location in an interior space, the signal having a frequency unique to the predetermined location such that the frequency of the signal can be used to identify the magnetic signal source;
- and
- determining, by the mobile device, a position of the mobile device relative to the predetermined location in the interior space based on the signal bearing and signal strength;
- wherein the magnetic signal is transmitted by energizing an electromagnetic coil with a controlled waveform to generate a time varying magnetic field having a frequency corresponding to the frequency unique to the predetermined location.
1 more element
A method for determining position, comprising:
- receiving, at a mobile device, a magnetic signal, wherein the magnetic signal includes a signal bearing and a signal strength, wherein the signal is transmitted from a magnetic signal source deployed at an indoor predetermined location, the signal having a frequency unique to the indoor predetermined location such that the frequency of the signal can be used to identify the magnetic signal source;
- and
- determining, by the mobile device, an absolute position and an absolute orientation of the mobile device within an interior space;
- wherein the magnetic signal is transmitted by energizing an electromagnetic coil with a controlled waveform to generate a time varying magnetic field having a frequency corresponding to the frequency unique to the predetermined location.
1 more element
A system for determining position, comprising:
- a mobile device comprising a receiver configured to receive a low-frequency magnetic signal transmitted from a magnetic signal source deployed at a predetermined location within an interior space, the signal having a frequency being unique to the predetermined location such that the frequency of the signal can be used to identify the magnetic signal source;
- and
- a processor adapted to determine a position within an interior space of the mobile
- device relative to the predetermined location based on a signal bearing and a signal strength of the magnetic signal
- wherein the magnetic signal is transmitted by energizing an electromagnetic coil with a controlled waveform to generate a time varying magnetic field having a frequency corresponding to the frequency unique to the predetermined location.
2 more elements
Dependencies are inferred from the claim text.