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Open loop polar transmitter having on-chip calibration

  • US 20070129025A1
  • Filed: 12/01/2005
  • Published: 06/07/2007
  • Est. Priority Date: 12/01/2005
  • Status: Abandoned Application
First Claim
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1. An on-chip calibration system for a transceiver, comprising:

  • a transmitter;

    a receiver;

    a phase and amplitude determination element configured to determine amplitude and phase characteristics of an output signal generated in the transmitter, the signal representing transmitter characteristics;

    an amplitude comparison element configured to compare the signal representing transmitter characteristics with a desired amplitude signal and generate an amplitude compensation signal;

    an AM predistortion element configured to modify an ideal AM signal with the amplitude compensation signal;

    a phase comparison element configured to compare the signal representing transmitter characteristics with a desired phase signal and generate a phase compensation signal; and

    a PM predistortion element configured to modify an ideal phase signal with the phase compensation signal.

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