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Method and apparatus for providing a Cartesian training waveform

  • US 7,719,355 B2
  • Filed: 05/31/2007
  • Issued: 05/18/2010
  • Est. Priority Date: 05/31/2007
  • Status: Active Grant
First Claim
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1. A method of providing a Cartesian training waveform for use when training a linear amplifier that uses Cartesian feedback linearization, comprising:

  • providing an in-phase signal component having a zero-crossing portion;

    providing a quadrature signal component having a non-zero portion;

    combining the in-phase signal component and the quadrature signal component such that the zero-crossing portion of the in-phase signal component is coincident in time with the non-zero portion of the quadrature signal component to provide a Cartesian training waveform exhibiting a gradual change in phase.

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