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Multi-band wide band power amplifier digital predistortion system

  • US 8,903,337 B2
  • Filed: 05/15/2013
  • Issued: 12/02/2014
  • Est. Priority Date: 12/21/2009
  • Status: Active Grant
First Claim
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1. A digital predistortion system comprising:

  • a multi-band input signal;

    at least one power amplifier for providing an amplified output including a distortion characteristic;

    a feedback signal derived from the amplified output, the feedback signal including a representation of at least a portion of the distortion characteristic; and

    predistortion logic responsive to an aliased representation of the feedback signal for generating predistortion coefficients for linearizing the amplified output of the power amplifier, wherein a sampling rate of the aliased representation of the feedback signal is less than twice a maximum bandwidth of the feedback signal.

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