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Adaptive filter for transmit leakage signal rejection

  • US 20050107051A1
  • Filed: 03/02/2004
  • Published: 05/19/2005
  • Est. Priority Date: 11/12/2003
  • Status: Active Grant
First Claim
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1. An integrated circuit comprising:

  • a summer operative to receive an input signal having a transmit leakage signal and to receive an estimator signal having an estimate of the transmit leakage signal, to subtract the estimator signal from the input signal, and to provide an output signal having the transmit leakage signal attenuated, wherein the transmit leakage signal corresponds to a portion of a modulated signal being transmitted in a wireless full-duplex communication system; and

    an estimator operative to receive the output signal and a reference signal having a version of the modulated signal, to estimate the transmit leakage signal in the input signal based on the output signal and the reference signal, and to provide the estimator signal having the estimate of the transmit leakage signal.

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