Concurrent detection of absolute distance and relative movement for sensing action gestures

  • US 10,579,150 B2
  • Filed: 02/03/2017
  • Issued: 03/03/2020
  • Est. Priority Date: 12/05/2016
  • Status: Active Grant
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First Claim
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1. A device comprising:

  • a processing system; and

    a radar-based gesture detection component implemented at least partially in hardware and comprising;

    a two-tone radar front-end component comprising a radar-emitting element for emitting a first carrier frequency tone and a second carrier frequency tone;

    an antenna for receiving incoming radio frequency (RF) signals generated by the first carrier frequency tone and the second carrier frequency tone reflecting off a target object;

    a direct-conversion homodyne receiver electrically coupled to the antenna for receiving the incoming RF signals from the antenna and converting the incoming RF signals into baseband quadrature signals;

    at least one analog-to-digital converter (ADC) to digitize the baseband quadrature signals to generate digital samples; and

    a processing pipeline component for detecting absolute distance and relative movement information about the target object by processing the digital samples.

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