Method and apparatus for location tracking in a multi-path environment
First Claim
1. A method of calibrating a wireless tracking system, comprising:
- providing at least one calibration signal using a mobile unit having a first plurality of antennae while the mobile unit is proximate at least one predetermined location;
receiving a plurality of signals at a second plurality of antennae in response to providing the at least one calibration signal;
determining a portion of a transmission matrix using the plurality of received signals and the at least one calibration signal; and
associating the portion of the transmission matrix with the predetermined location, wherein associating the portion of the transmission matrix with the predetermined location comprises associating the portion of the transmission matrix with the predetermined location using a portion of at least one stored transmission matrix, and wherein the portion of the at least one stored transmission matrix is associated with the predetermined location.
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Accused Products
Abstract
The present invention provides a method of calibrating a wireless tracking system and a method of tracking a mobile unit in a wireless local area network. The method includes providing at least one calibration signal using a mobile unit having a first plurality of antennae while the mobile unit is proximate at least one predetermined location and receiving a plurality of signals at a second plurality of antennae in response to providing the at least one calibration signal. The method also includes determining a portion of a transmission matrix using the plurality of received signals and the at least one calibration signal and associating the portion of the transmission matrix with the predetermined location.
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Citations
26 Claims
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1. A method of calibrating a wireless tracking system, comprising:
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providing at least one calibration signal using a mobile unit having a first plurality of antennae while the mobile unit is proximate at least one predetermined location; receiving a plurality of signals at a second plurality of antennae in response to providing the at least one calibration signal; determining a portion of a transmission matrix using the plurality of received signals and the at least one calibration signal; and associating the portion of the transmission matrix with the predetermined location, wherein associating the portion of the transmission matrix with the predetermined location comprises associating the portion of the transmission matrix with the predetermined location using a portion of at least one stored transmission matrix, and wherein the portion of the at least one stored transmission matrix is associated with the predetermined location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of tracking a mobile unit in a wireless local area network, comprising:
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receiving a plurality of signals at a first plurality of antennae; determining a portion of a transmission matrix using the plurality of received signals; and associating the portion of the transmission matrix with the predetermined location, wherein associating the portion of the transmission matrix with the predetermined location comprises associating the portion of the transmission matrix with the predetermined location using a portion of at least one stored transmission matrix, and wherein the portion of the at least one stored transmission matrix is associated with the predetermined location. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A wireless local area network, comprising:
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a mobile unit having a first plurality of antennae capable of providing a plurality of signals; an access point having a second plurality of antennae capable of receiving a plurality of signals in response to the plurality of signals provided by the mobile unit, the access point being capable of; determining a portion of a transmission matrix using the plurality of received signals; and associating the portion of the transmission matrix with a predetermined location, wherein associating the portion of the transmission matrix with the predetermined location comprises associating the portion of the transmission matrix with the predetermined location using a portion of at least one stored transmission matrix, and wherein the portion of the at least one stored transmission matrix is associated with the predetermined location. - View Dependent Claims (25, 26)
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Specification