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Transmit power management for specific absorption rates

  • US 8,825,102 B2
  • Filed: 09/21/2011
  • Issued: 09/02/2014
  • Est. Priority Date: 09/21/2010
  • Status: Active Grant
First Claim
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1. A mobile device, comprising:

  • a transmitter configured to operate at a transmit power controlled by a transmit power limit;

    a proximity sensor configured to determine when the mobile device is in close proximity to a user of the mobile device;

    a processor; and

    a transmit power regulator configured to;

    calculate a cumulative energy amount transmitted by the transmitter over a specified number of frames;

    determine whether the cumulative energy amount exceeds an energy limit;

    for each frame, in a series of frames, calculate a reduced transmit power limit when the cumulative energy amount exceeds the energy limit, wherein the reduced transmit power limit for each frame in the series of frames is based on a damping factor that gradually reduces the cumulative energy amount when the proximity sensor determines that the mobile device is in close proximity to the user of the mobile device.

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