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LINEARIZATION OF INTERMODULATION BANDS FOR CONCURRENT DUAL-BAND POWER AMPLIFIERS

  • US 20150049841A1
  • Filed: 12/02/2013
  • Published: 02/19/2015
  • Est. Priority Date: 05/22/2013
  • Status: Active Grant
First Claim
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1. A concurrent multi-band transmitter, comprising:

  • a digital predistortion subsystem comprising a plurality of digital predistorters configured to process a plurality of digital input signals for a plurality of frequency bands of a concurrent multi-band signal to provide a plurality of predistorted digital input signals each being for a different one of the plurality of frequency bands of the concurrent multi-band signal and one or more intermodulation distortion compensation signals each being for a different one of one or more intermodulation distortion frequency bands;

    circuitry configured to process the plurality of predistorted digital input signals and the one or more intermodulation distortion compensation signals to provide a predistorted concurrent multi-band signal;

    power amplifier circuitry configured to amplify the predistorted concurrent multi-band signal to provide the concurrent multi-band signal; and

    an adaptation subsystem configured to adaptively configure the plurality of digital predistorters based on a memory polynomial based digital baseband model of the plurality of digital predistorters.

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