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Method, apparatus, and computer program product for high accuracy location determination

  • US 9,702,963 B2
  • Filed: 05/30/2012
  • Issued: 07/11/2017
  • Est. Priority Date: 05/30/2012
  • Status: Active Grant
First Claim
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1. A method for low power position detection between relatively moving objects, for wireless location determination, comprising:

  • receiving, by a first transceiver of an apparatus having a first antenna array mounted on a moveable platform, from a remote device, one or more wireless Bluetooth Low Energy advertising packets modified to have an overall packet length with a first portion of the packet including a header and payload and a second portion of the packet being a direction finding extension containing angle of arrival information including a reference binary signal pattern in a continuous digital wave from the remote device, wherein the moveable platform is in motion relative to the remote device;

    sampling, by a sampler and phase detector of the apparatus, the sampler configured to not process the header or payload of the first portion of the packet, but to sample the direction finding extension of the second portion of the packet, a first phase and amplitude of the reference binary signals in the received pattern in the continuous digital wave in the direction finding extension of the second portion of the packet;

    decoding, by a decoder of the apparatus, the sampled reference binary signals and determining at least a first angle of arrival from the received angle of arrival information, wherein the first angle of arrival is determined when the apparatus is at a first location, using the first antenna array receiving the information packets;

    sampling, by the sampler and phase detector of the apparatus, the sampler configured to not process the header or payload of the first portion of the packet, but to sample the direction finding extension of the second portion of the packet, a second phase and amplitude of the reference binary signals in the received pattern in the continuous digital wave in the direction finding extension of the second portion of the packet;

    decoding, by the decoder of the apparatus, the sampled reference binary signals and determining at least a second angle of arrival from the received angle of arrival information, wherein the second angle of arrival is determined when the apparatus is at a second location, using the first antenna array receiving the information packets;

    generating distance estimation data in the apparatus relative to the remote device, based on a separation distance between the first location and the second location, the determined first angle of arrival and second angle of arrival; and

    determining relative position of the apparatus and the remote device for location determination, based on the distance estimation data, the determined first angle of arrival and second angle of arrival.

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