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Shaping near-field transmission signals

  • US 9,450,649 B2
  • Filed: 07/01/2013
  • Issued: 09/20/2016
  • Est. Priority Date: 07/02/2012
  • Status: Active Grant
First Claim
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1. A method comprising:

  • estimating a coupling condition of an antenna;

    shaping, based on the coupling condition of the antenna, a baseband data signal;

    modulating a radio frequency (RF) carrier signal with the shaped baseband data signal to provide a shaped transmission signal;

    applying the shaped transmission signal to the antenna to generate an RF field, the shaped transmission signal effective to reduce distortion of the RF field associated with the coupling condition;

    updating the coupling condition of the antenna; and

    dynamically adjusting the shaped transmission signal while the shaped transmission signal is applied to the antenna, the adjusting responsive to a changed coupling condition.

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