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Predistortion circuit and method for compensating A/D and other distortion in a digital RF communications transmitter

  • US 20050163251A1
  • Filed: 05/06/2004
  • Published: 07/28/2005
  • Est. Priority Date: 01/27/2004
  • Status: Active Grant
First Claim
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1. A method of compensating for distortion introduced by analog-transmitter components of a digital communications transmitter, said method comprising:

  • providing a digital-to-analog converter (D/A) and an analog-to-digital converter (A/D), said D/A exhibiting higher resolution than said A/D;

    digitizing, in said A/D, a first signal output by said D/A;

    in response to said first signal, compensating for distortion introduced by said A/D by processing an output of said A/D;

    digitizing, in said A/D, a second signal output by analog-transmitter components; and

    in response to said second signal, counteracting distortion introduced by said analog-transmitter components by processing said output of said A/D.

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