Wireless positioning approach using time-delay of signals with a known transmission pattern
First Claim
1. A method of determining a location of a mobile device comprising a plurality of antennas, the method comprising:
- receiving signals with known radio transmission patterns at each of the plurality of mobile device antennas from a transmitting device;
correlating the signal received at each particular antenna with a corresponding signal that has a same known radio transmission pattern to determine a time the signal traveled between the transmitting device and the particular antenna;
determining a location of each of the plurality of mobile device antennas based on the time the signal traveled between the transmitting device and each mobile device antenna; and
determining the location of the mobile device based on the location of the plurality of antennas.
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Abstract
A method of determining the location of a mobile device is provided. The method receives a signal with a known radio transmission pattern at the mobile device from each of several transmitting devices. The method correlates each received signal with a corresponding signal that has a same known radio transmission pattern to determine the time the signal traveled between the corresponding transmitting device and the mobile device. The method determines the location of the mobile device based on the time the signal travelled between the corresponding transmitting device and the mobile device. In some embodiments, determining the location of the mobile device does not require calculating a distance between the mobile device and any of the transmitting devices. In some embodiments determining the location of the mobile device includes solving a function that is dependent on the time the signals traveled between each corresponding transmitting device and the mobile device.
121 Citations
30 Claims
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1. A method of determining a location of a mobile device comprising a plurality of antennas, the method comprising:
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receiving signals with known radio transmission patterns at each of the plurality of mobile device antennas from a transmitting device; correlating the signal received at each particular antenna with a corresponding signal that has a same known radio transmission pattern to determine a time the signal traveled between the transmitting device and the particular antenna; determining a location of each of the plurality of mobile device antennas based on the time the signal traveled between the transmitting device and each mobile device antenna; and determining the location of the mobile device based on the location of the plurality of antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A non-transitory machine readable medium storing a program for determining a location of a mobile device comprising a plurality of antennas, the program for execution by at least one processing unit of the mobile device, the program comprising sets of instructions for:
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correlating signals with known radio transmission pattern received from a transmitting device at each particular antenna in the plurality of mobile device antennas with a corresponding signal that has a same known radio transmission pattern to determine a time the signal traveled between the transmitting device and the particular antenna; determining a location of each of the plurality of mobile device antennas based on the time the signal traveled between the transmitting device and each mobile device antenna; and determining the location of the mobile device based on the location of the plurality of antennas. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for determining a location of a mobile device, the system comprising:
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a mobile device comprising a plurality of antennas to receive signals; a transmitting device configured to transmit signals with known radio transmission pattern to the mobile device; the mobile device configured to; receive signals with known radio transmission pattern at each of the plurality of mobile device antennas from the transmitting device; correlate the signal received at each particular antenna with a corresponding signal that has a same known radio transmission pattern to determine a time the signal traveled between the transmitting device and the particular antenna; determine a location of each of the plurality of mobile device antennas based on the time the signal traveled between the transmitting device and each mobile device antenna; and determine the location of the mobile device based on the location of the plurality of antennas. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification