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Distributed-input OFDM angle-of-arrival scheme for location determination

  • US 9,521,520 B2
  • Filed: 11/13/2013
  • Issued: 12/13/2016
  • Est. Priority Date: 11/13/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • at a particular first wireless device having a plurality of antennas and that is part of a group of a plurality of first wireless devices at respective known locations, generating a location packet to be transmitted to a second wireless device, wherein the location packet is one of a plurality of location packets enabling a second wireless device to determine a location of the second wireless device by performing angle of arrival location determination with respect to the respective known locations of the plurality of first wireless devices;

    determining a particular subset of subcarriers among a set of subcarriers available for use in transmitting the location packet, the particular subset of subcarriers associated with the particular first wireless device;

    transmitting the location packet to the second wireless device across the particular subset of subcarriers using the plurality of antennas of the particular first wireless device, wherein the location packet is transmitted simultaneously with the plurality of location packets transmitted by a corresponding one or more of other first wireless devices in the group,wherein the plurality of location packets are simultaneously transmitted within a duration of a single location packet by the plurality of first wireless devices in the group to the second wireless device using respective different subsets of subcarriers to enable the second wireless device to perform angle of arrival location determination with respect to the respective known locations of the plurality of first wireless devices in the group.

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