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Spatial diversity for relative position tracking

  • US 10,324,474 B2
  • Filed: 01/12/2017
  • Issued: 06/18/2019
  • Est. Priority Date: 02/13/2015
  • Status: Active Grant
First Claim
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1. A vehicle comprising:

  • at least three spatially separated receiver antennae configured to receive radio frequency (RF) signals from one or more RF-transmitting antennae coupled to an object;

    receiver circuitry coupled to the at least three spatially separated receiver antennae to acquire the RF signals received by the at least three spatially separated receiver antennae and to determine timing information from the acquired RF signals;

    memory storing information related to fixed distances between each receiver antenna and each other receiver antenna of the at least three spatially separated receiver antennae;

    a processor coupled to

         1) the memory to access the stored information related to the fixed distances between each receiver antenna and each other receiver antenna of the at least three spatially separated receiver antennae, and

         2) the receiver circuitry to receive the timing information determined from the RF signals received by the at least three spatially separated receiver antennae, the processor being configured to determine a relative position of the vehicle with respect to the one or more RF-transmitting antennae based on the stored information related to the fixed distances between each receiver antenna and each other receiver antenna of the at least three spatially separated receiver antennae and on the timing information determined by the receiver circuitry; and

    a control system configured to control operation of the vehicle in response to the relative position of the vehicle with respect to the one or more RF-transmitting antennae determined by the processor.

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