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Object and movement detection

  • US 8,625,846 B2
  • Filed: 03/18/2009
  • Issued: 01/07/2014
  • Est. Priority Date: 03/18/2008
  • Status: Active Grant
First Claim
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1. A method of recognizing motion of a human hand, the method comprising:

  • transmitting a plurality of transmit signals in respective time frames;

    receiving a plurality of receive signals, at least some of the receive signals being reflected from the hand;

    calculating a plurality of channel impulse responses using the transmit and receive signals, wherein the receive signals are convolutions of the transmit signals and the channel impulse responses;

    defining a matrix of impulse responses, with impulse responses for adjacent time frames adjacent to each other; and

    analysing the matrix for patterns corresponding to movement of the hand.

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