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Joint Adaptive Bias Point Adjustment and Digital Pre-Distortion for Power Amplifier

  • US 20120219048A1
  • Filed: 02/28/2011
  • Published: 08/30/2012
  • Est. Priority Date: 02/28/2011
  • Status: Active Grant
First Claim
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1. A transmitter circuit, comprising:

  • one or more transmission chain elements configured to receive an input signal and to generate an output signal;

    a figure of merit measurement element configured to receive information about the output signal from a feedback loop, extending from the one or more transmission chain elements to the figure of merit measurement element, and to determine a measured figure of merit of the output signal;

    an adaptive biasing element configured to adaptively bias the one or more transmission chain elements to iteratively adjusting a current consumption of the one or more transmission chain elements; and

    a pre-distortion element located upstream of the one or more transmission chain elements and configured to generate a distorted input signal to account for non-linearities introduced into the output signal during the adaptive biasing.

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