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Systems and methods of wireless position tracking

  • US 10,605,904 B2
  • Filed: 04/16/2018
  • Issued: 03/31/2020
  • Est. Priority Date: 11/10/2011
  • Status: Active Grant
First Claim
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1. A position tracking system comprising:

  • a transmitting antenna transmitting a radio frequency (RF) signal modulated by a first pseudo-random noise sequence;

    a plurality of receiving antennae acquiring the RF signal, one of the plurality of receiving antennae being designated a reference antenna, the plurality of receiving antennae including at least three receiving antennae;

    a corresponding plurality of demodulators, each demodulator of the plurality of demodulators coupled to a respective one of the plurality of receiving antennae and configured to demodulate the RF signal received by the respective receiving antenna using a second pseudo-random noise sequence;

    a processing unit determining phase differences between a reference recovered signal derived from the demodulated RF signal received by the reference antenna and a recovered signal derived from the demodulated RF signal received by each remaining receiving antenna of the plurality of receiving antennae, the processing unit computing a position of the transmitting antenna with respect to the plurality of receiving antennae based on the determined phase differences.

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