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Methods and Apparatus for Reducing Average-to-Minimum Power Ratio in Communications Signals

  • US 20100316164A1
  • Filed: 06/11/2009
  • Published: 12/16/2010
  • Est. Priority Date: 06/11/2009
  • Status: Active Grant
First Claim
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1. A baseband circuit for a communications transmitter, comprising:

  • a baseband modulator configured to generate a sequence of symbols formatted in accordance with a non-constant envelope modulation scheme;

    a pulse-shaping filter configured to band-limit said sequence of samples and provide a sequence of samples; and

    an average-to-minimum power ratio (AMPR) reduction circuit configured to analyze and modify one or more samples in said sequence of samples if a sample in said sequence of samples that has been previously analyzed by said AMPR reduction circuit is determined to have a magnitude less than a low-magnitude threshold.

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