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Methods and Apparatus for Reducing Own-Transmitter Interference in Low-IF and Zero-IF Receivers

  • US 20090325509A1
  • Filed: 06/27/2008
  • Published: 12/31/2009
  • Est. Priority Date: 06/27/2008
  • Status: Active Grant
First Claim
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1. A radio transceiver circuit, comprising:

  • a receiver circuit configured to downconvert, filter, and sample a radio frequency signal comprising a desired signal and a transmitter leakage signal to obtain a sampled signal of interest;

    a distortion estimation circuit configured to generate a sampled distortion signal estimate of one or more distortion products of the transmitter leakage signal; and

    an interference subtraction circuit configured to combine the sampled distortion signal estimate with the sampled signal of interest to obtain interference-reduced signal samples.

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