Radar-based authentication

  • US 10,503,883 B1
  • Filed: 10/06/2016
  • Issued: 12/10/2019
  • Est. Priority Date: 10/06/2015
  • Status: Active Grant
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First Claim
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1. An authentication module implemented at least partially in hardware of a computing device and configured to initiate one or more authentication states based on biometric characteristicsby performing operations comprising:

  • initiating transmission of outgoing frequency-modulated continuous-wave (FMCW) radio frequency (RF) radar signals via a plurality of transmitting antennas of the computing device using beamforming techniques, the transmitting antennas collocated to enable the beamforming techniques such that a radiation pattern generated by the transmitting antennas comprises constructive interference and destructive interference;

    receiving, via a plurality of receiving antennas of the computing device that are separate from the transmitting antennas, incoming RF signals generated by the outgoing FMCW RF radar signals reflecting off a person, a number of the receiving antennas greater than or equal to a number of the transmission antennas;

    analyzing the incoming RF signals to determine a spatial representation of the person;

    comparing the spatial representation of the person with stored biometric characteristics in an authentication library to recognize the person as a known person or a known type of person; and

    determining an authentication state associated with the known person or known type of person from the authentication library.

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