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Apparatus and method for improving an output signal from a nonlinear device through dynamic signal pre-distortion based upon lagrange interpolation

  • US 20040052313A1
  • Filed: 09/13/2002
  • Published: 03/18/2004
  • Est. Priority Date: 09/13/2002
  • Status: Active Grant
First Claim
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1. An apparatus for pre-distorting a signal, comprising:

  • input nodes to receive an in-phase input signal and a quadrature input signal;

    feedback nodes to receive an in-phase feedback signal and a quadrature feedback signal;

    output nodes to transmit an in-phase pre-distorted signal and a quadrature pre-distorted signal; and

    a Lagrange interpolation digital pre-distortion circuit connected to said input nodes, said feedback nodes, and said output nodes, said Lagrange interpolation digital pre-distortion circuit being configured to perform a Lagrange interpolation on said in-phase input signal, said quadrature input signal, said in-phase feedback signal, and said quadrature feedback signal to produce said in-phase pre-distorted signal and said quadrature pre-distorted signal.

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