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System and method for digital interference cancellation

  • US 8,521,117 B1
  • Filed: 10/28/2012
  • Issued: 08/27/2013
  • Est. Priority Date: 05/02/2008
  • Status: Active Grant
First Claim
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1. A receiver comprising:

  • an input configured to receive an analog radio frequency input signal within a radio frequency band comprising a plurality of independently modulated signals;

    a signal generator, configured to generate a nulling analog radio frequency signal which tracks a phase of an undesired signal of the plurality of independent signals over time;

    a subtractor configured to receive a representation of the analog radio frequency signal and the nulling signal, and to produce a modified representation of the analog radio frequency signal with a diminished representation of the undesired signal; and

    a digitizer having an instantaneous bandwidth of at least 10 MHz, receiving the modified representation, wherein the undesired signal of the representation of the analog radio frequency signal interferes with a representation of modulation information of at least one of the plurality of independently modulated signals in an output of the digitizer, and the modified representation of the analog radio frequency signal with a diminished representation of the undesired signal does not interfere with a representation of modulation information of at least one of the plurality of independently modulated signals in the output of the digitizer.

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